Skip virtual disks (#1332)

- Add per-frame size limit (1MB) to prevent single massive log entries
- Add total log size limit (5MB) for network transfer and browser rendering
- Gracefully truncate logs that exceed limits instead of consuming unbounded memory

.dockerignore

@@ -0,0 +1,48 @@
+# Node.js dependencies
+node_modules
+internalsite/node_modules
+
+# Go build artifacts and binaries
+build
+dist
+*.exe
+beszel-agent
+beszel_data*
+pb_data
+data
+temp
+
+# Development and IDE files
+.vscode
+.idea*
+*.swc
+__debug_*
+
+# Git and version control
+.git
+.gitignore
+
+# Documentation and supplemental files
+*.md
+supplemental
+freebsd-port
+
+# Test files (exclude from production builds)
+*_test.go
+coverage
+
+# Docker files
+dockerfile_*
+
+# Temporary files
+*.tmp
+*.bak
+*.log
+
+# OS specific files
+.DS_Store
+Thumbs.db
+
+# .NET build artifacts
+agent/lhm/obj
+agent/lhm/bin

.github/DISCUSSION_TEMPLATE/support.yml

@@ -0,0 +1,61 @@
+body:
+  - type: markdown
+    attributes:
+      value: |
+        ### Before opening a discussion:
+
+        - Check the [common issues guide](https://beszel.dev/guide/common-issues).
+        - Search existing [issues](https://github.com/henrygd/beszel/issues) and [discussions](https://github.com/henrygd/beszel/discussions) (including closed).
+
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: A clear and concise description of the issue or question. If applicable, add screenshots to help explain your problem.
+    validations:
+      required: true
+  - type: input
+    id: system
+    attributes:
+      label: OS / Architecture
+      placeholder: linux/amd64 (agent), freebsd/arm64 (hub)
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Beszel version
+      placeholder: 0.9.1
+    validations:
+      required: true
+  - type: dropdown
+    id: install-method
+    attributes:
+      label: Installation method
+      options:
+        - Docker
+        - Binary
+        - Nix
+        - Unraid
+        - Coolify
+        - Other (please describe above)
+    validations:
+      required: true
+  - type: textarea
+    id: config
+    attributes:
+      label: Configuration
+      description: Please provide any relevant service configuration
+      render: yaml
+  - type: textarea
+    id: hub-logs
+    attributes:
+      label: Hub Logs
+      description: Check the logs page in PocketBase (`/_/#/logs`) for relevant errors (copy JSON).
+      render: json
+  - type: textarea
+    id: agent-logs
+    attributes:
+      label: Agent Logs
+      description: Please provide any logs from the agent, if relevant. Use `LOG_LEVEL=debug` for more info.
+      render: shell

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,134 @@
+name: 🐛 Bug report
+description: Report a new bug or issue.
+title: '[Bug]: '
+labels: ['bug', "needs confirmation"]
+body:
+  - type: dropdown
+    id: component
+    attributes:
+      label: Component
+      description: Which part of Beszel is this about?
+      options:
+        - Hub
+        - Agent
+        - Hub & Agent
+    validations:
+      required: true
+  - type: markdown
+    attributes:
+      value: |
+        ### Thanks for taking the time to fill out this bug report!
+
+        - For more general support, please [start a support thread](https://github.com/henrygd/beszel/discussions/new?category=support).
+        - To request a change or feature, use the [feature request form](https://github.com/henrygd/beszel/issues/new?template=feature_request.yml).
+        - Please do not submit bugs that are specific to ZFS. We plan to add integration with ZFS utilities in the near future.
+
+        ### Before submitting a bug report:
+
+        - Check the [common issues guide](https://beszel.dev/guide/common-issues).
+        - Search existing [issues](https://github.com/henrygd/beszel/issues) and [discussions](https://github.com/henrygd/beszel/discussions) (including closed).
+  - type: textarea
+    id: description
+    attributes:
+      label: Description
+      description: Explain the issue you experienced clearly and concisely.
+      placeholder: I went to the coffee pot and it was empty.
+    validations:
+      required: true
+  - type: textarea
+    id: expected-behavior
+    attributes:
+      label: Expected Behavior
+      description: In a perfect world, what should have happened?
+      placeholder: When I got to the coffee pot, it should have been full.
+    validations:
+      required: true
+  - type: textarea
+    id: steps-to-reproduce
+    attributes:
+      label: Steps to Reproduce
+      description: Describe how to reproduce the issue in repeatable steps.
+      placeholder: |
+        1. Go to the coffee pot.
+        2. Make more coffee.
+        3. Pour it into a cup.
+    validations:
+      required: true
+  - type: dropdown
+    id: category
+    attributes:
+      label: Category
+      description: Which category does this relate to most?
+      options:
+        - Metrics
+        - Charts & Visualization
+        - Settings & Configuration
+        - Notifications & Alerts
+        - Authentication
+        - Installation
+        - Performance
+        - UI / UX
+        - Other
+    validations:
+      required: true
+  - type: dropdown
+    id: metrics
+    attributes:
+      label: Affected Metrics
+      description: If applicable, which specific metric does this relate to most?
+      options:
+        - CPU
+        - Memory
+        - Storage
+        - Network
+        - Containers
+        - GPU
+        - Sensors
+        - Other
+    validations:
+      required: true
+  - type: input
+    id: system
+    attributes:
+      label: OS / Architecture
+      placeholder: linux/amd64 (agent), freebsd/arm64 (hub)
+    validations:
+      required: true
+  - type: input
+    id: version
+    attributes:
+      label: Beszel version
+      placeholder: 0.9.1
+    validations:
+      required: true
+  - type: dropdown
+    id: install-method
+    attributes:
+      label: Installation method
+      options:
+        - Docker
+        - Binary
+        - Nix
+        - Unraid
+        - Coolify
+        - Other (please describe above)
+    validations:
+      required: true
+  - type: textarea
+    id: config
+    attributes:
+      label: Configuration
+      description: Please provide any relevant service configuration
+      render: yaml
+  - type: textarea
+    id: hub-logs
+    attributes:
+      label: Hub Logs
+      description: Check the logs page in PocketBase (`/_/#/logs`) for relevant errors (copy JSON).
+      render: json
+  - type: textarea
+    id: agent-logs
+    attributes:
+      label: Agent Logs
+      description: Please provide any logs from the agent, if relevant. Use `LOG_LEVEL=debug` for more info.
+      render: shell

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,8 @@
+blank_issues_enabled: false
+contact_links:
+  - name: 💬 Support and questions
+    url: https://github.com/henrygd/beszel/discussions
+    about: Ask and answer questions here.
+  - name: ℹ️ View the Common Issues page
+    url: https://beszel.dev/guide/common-issues
+    about: Find information about commonly encountered problems.

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,76 @@
+name: 🚀 Feature request
+description: Request a new feature or change.
+title: "[Feature]: "
+labels: ["enhancement", "needs review"]
+body:
+  - type: dropdown
+    id: component
+    attributes:
+      label: Component
+      description: Which part of Beszel is this about?
+      options:
+        - Hub
+        - Agent
+        - Hub & Agent
+    validations:
+      required: true
+  - type: markdown
+    attributes:
+      value: Before submitting, please search existing [issues](https://github.com/henrygd/beszel/issues) and [discussions](https://github.com/henrygd/beszel/discussions) (including closed).
+  - type: textarea
+    attributes:
+      label: Describe the feature you would like to see
+    validations:
+      required: true
+  - type: textarea
+    id: motivation
+    attributes:
+      label: Motivation / Use Case
+      description: Why do you want this feature? What problem does it solve?
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe how you would like to see this feature implemented
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Screenshots
+      description: Please attach any relevant screenshots, such as images from your current solution or similar implementations.
+    validations:
+      required: false
+  - type: dropdown
+    id: category
+    attributes:
+      label: Category
+      description: Which category does this relate to most?
+      options:
+        - Metrics
+        - Charts & Visualization
+        - Settings & Configuration
+        - Notifications & Alerts
+        - Authentication
+        - Installation
+        - Performance
+        - UI / UX
+        - Other
+    validations:
+      required: true
+  - type: dropdown
+    id: metrics
+    attributes:
+      label: Affected Metrics
+      description: If applicable, which specific metric does this relate to most?
+      options:
+        - CPU
+        - Memory
+        - Storage
+        - Network
+        - Containers
+        - GPU
+        - Sensors
+        - Other
+    validations:
+      required: true

.github/funding.yml

@@ -0,0 +1 @@
+buy_me_a_coffee: henrygd

.github/pull_request_template.md

@@ -0,0 +1,33 @@
+## 📃 Description
+
+A short description of the pull request changes should go here and the sections below should list in detail all changes. You can remove the sections you don't need.
+
+## 📖 Documentation
+
+Add a link to the PR for [documentation](https://github.com/henrygd/beszel-docs) changes.
+
+## 🪵 Changelog
+
+### ➕ Added
+
+- one
+- two
+
+### ✏️ Changed
+
+- one
+- two
+
+### 🔧 Fixed
+
+- one
+- two
+
+### 🗑️ Removed
+
+- one
+- two
+
+## 📷 Screenshots
+
+If this PR has any UI/UX changes it's strongly suggested you add screenshots here.

.github/workflows/docker-images.yml

@@ -3,7 +3,7 @@ name: Make docker images
 on:
   push:
     tags:
-      - '*'
+      - "v*"
 
 jobs:
   build:
@@ -12,12 +12,138 @@ jobs:
       fail-fast: false
       matrix:
         include:
+          # henrygd/beszel
           - image: henrygd/beszel
-            context: ./hub
-            dockerfile: ./hub/Dockerfile
+            dockerfile: ./internal/dockerfile_hub
+            registry: docker.io
+            username_secret: DOCKERHUB_USERNAME
+            password_secret: DOCKERHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # henrygd/beszel-agent
           - image: henrygd/beszel-agent
-            context: ./agent
-            dockerfile: ./agent/Dockerfile
+            dockerfile: ./internal/dockerfile_agent
+            registry: docker.io
+            username_secret: DOCKERHUB_USERNAME
+            password_secret: DOCKERHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # henrygd/beszel-agent-nvidia
+          - image: henrygd/beszel-agent-nvidia
+            dockerfile: ./internal/dockerfile_agent_nvidia
+            platforms: linux/amd64
+            registry: docker.io
+            username_secret: DOCKERHUB_USERNAME
+            password_secret: DOCKERHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # henrygd/beszel-agent-intel
+          - image: henrygd/beszel-agent-intel
+            dockerfile: ./internal/dockerfile_agent_intel
+            platforms: linux/amd64
+            registry: docker.io
+            username_secret: DOCKERHUB_USERNAME
+            password_secret: DOCKERHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # henrygd/beszel-agent:alpine
+          - image: henrygd/beszel-agent
+            dockerfile: ./internal/dockerfile_agent_alpine
+            registry: docker.io
+            username_secret: DOCKERHUB_USERNAME
+            password_secret: DOCKERHUB_TOKEN
+            tags: |
+              type=raw,value=alpine
+              type=semver,pattern={{version}}-alpine
+              type=semver,pattern={{major}}.{{minor}}-alpine
+              type=semver,pattern={{major}}-alpine
+
+          # ghcr.io/henrygd/beszel
+          - image: ghcr.io/${{ github.repository }}/beszel
+            dockerfile: ./internal/dockerfile_hub
+            registry: ghcr.io
+            username: ${{ github.actor }}
+            password_secret: GITHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # ghcr.io/henrygd/beszel-agent
+          - image: ghcr.io/${{ github.repository }}/beszel-agent
+            dockerfile: ./internal/dockerfile_agent
+            registry: ghcr.io
+            username: ${{ github.actor }}
+            password_secret: GITHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # ghcr.io/henrygd/beszel-agent-nvidia
+          - image: ghcr.io/${{ github.repository }}/beszel-agent-nvidia
+            dockerfile: ./internal/dockerfile_agent_nvidia
+            platforms: linux/amd64
+            registry: ghcr.io
+            username: ${{ github.actor }}
+            password_secret: GITHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # ghcr.io/henrygd/beszel-agent-intel
+          - image: ghcr.io/${{ github.repository }}/beszel-agent-intel
+            dockerfile: ./internal/dockerfile_agent_intel
+            platforms: linux/amd64
+            registry: ghcr.io
+            username: ${{ github.actor }}
+            password_secret: GITHUB_TOKEN
+            tags: |
+              type=raw,value=edge
+              type=semver,pattern={{version}}
+              type=semver,pattern={{major}}.{{minor}}
+              type=semver,pattern={{major}}
+              type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+
+          # ghcr.io/henrygd/beszel-agent:alpine
+          - image: ghcr.io/${{ github.repository }}/beszel-agent
+            dockerfile: ./internal/dockerfile_agent_alpine
+            registry: ghcr.io
+            username: ${{ github.actor }}
+            password_secret: GITHUB_TOKEN
+            tags: |
+              type=raw,value=alpine
+              type=semver,pattern={{version}}-alpine
+              type=semver,pattern={{major}}.{{minor}}-alpine
+              type=semver,pattern={{major}}-alpine
+
     permissions:
       contents: read
       packages: write
@@ -30,10 +156,10 @@ jobs:
         uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
-        run: bun install --no-save --cwd ./hub/site
+        run: bun install --no-save --cwd ./internal/site
 
       - name: Build site
-        run: bun run --cwd ./hub/site build
+        run: bun run --cwd ./internal/site build
 
       - name: Set up QEMU
         uses: docker/setup-qemu-action@v3
@@ -46,29 +172,27 @@ jobs:
         uses: docker/metadata-action@v5
         with:
           images: ${{ matrix.image }}
-          tags: |
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=raw,value={{sha}},enable=${{ github.ref_type != 'tag' }}
+          tags: ${{ matrix.tags }}
 
       # https://github.com/docker/login-action
       - name: Login to Docker Hub
-        if: github.event_name != 'pull_request'
+        env:
+          password_secret_exists: ${{ secrets[matrix.password_secret] != '' && 'true' || 'false' }}
+        if: github.event_name != 'pull_request' && env.password_secret_exists == 'true'
         uses: docker/login-action@v3
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          username: ${{ matrix.username || secrets[matrix.username_secret] }}
+          password: ${{ secrets[matrix.password_secret] }}
+          registry: ${{ matrix.registry }}
 
       # Build and push Docker image with Buildx (don't push on PR)
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         uses: docker/build-push-action@v5
         with:
-          context: '${{ matrix.context }}'
+          context: ./
           file: ${{ matrix.dockerfile }}
-          platforms: linux/amd64,linux/arm64
-          push: ${{ github.ref_type == 'tag' }}
+          platforms: ${{ matrix.platforms || 'linux/amd64,linux/arm64,linux/arm/v7' }}
+          push: ${{ github.ref_type == 'tag' && secrets[matrix.password_secret] != '' }}
           tags: ${{ steps.metadata.outputs.tags }}
           labels: ${{ steps.metadata.outputs.labels }}
-          cache-from: type=gha
-          cache-to: type=gha

.github/workflows/inactivity-actions.yml

@@ -0,0 +1,43 @@
+name: 'Issue and PR Maintenance'
+
+on:
+  schedule:
+    - cron: '0 0 * * *'   # runs at midnight UTC
+  workflow_dispatch:
+
+permissions:
+  issues: write
+  pull-requests: write
+
+jobs:
+  close-stale:
+    name: Close Stale Issues
+    runs-on: ubuntu-24.04
+    steps:
+      - name: Close Stale Issues
+        uses: actions/stale@v9
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+
+          # Messaging
+          stale-issue-message: >
+            👋 This issue has been automatically marked as stale due to inactivity.
+            If this issue is still relevant, please comment to keep it open.
+            Without activity, it will be closed in 7 days.
+
+          close-issue-message: >
+            🔒 This issue has been automatically closed due to prolonged inactivity.
+            Feel free to open a new issue if you have further questions or concerns.
+
+          # Timing
+          days-before-issue-stale: 14
+          days-before-issue-close: 7
+
+          # Labels
+          stale-issue-label: 'stale'
+          remove-stale-when-updated: true
+          only-issue-labels: 'awaiting-requester'
+
+          # Exemptions
+          exempt-assignees: true
+          exempt-milestones: true

.github/workflows/label-from-dropdown.yml

@@ -0,0 +1,82 @@
+name: Label issues from dropdowns
+
+on:
+  issues:
+    types: [opened]
+
+jobs:
+  label_from_dropdown:
+    runs-on: ubuntu-latest
+    permissions:
+      issues: write
+    steps:
+      - name: Apply labels based on dropdown choices
+        uses: actions/github-script@v7
+        with:
+          script: |
+
+            const issueNumber = context.issue.number;
+            const owner = context.repo.owner;
+            const repo = context.repo.repo;
+
+            // Get the issue body
+            const body = context.payload.issue.body;
+
+            // Helper to find dropdown value in the body (assuming markdown format)
+            function extractSectionValue(heading) {
+              const regex = new RegExp(`### ${heading}\\s+([\\s\\S]*?)(?:\\n###|$)`, 'i');
+              const match = body.match(regex);
+              if (match) {
+                // Get the first non-empty line after the heading
+                const lines = match[1].split('\n').map(l => l.trim()).filter(Boolean);
+                return lines[0] || null;
+              }
+              return null;
+            }
+
+            // Extract dropdown selections
+            const category = extractSectionValue('Category');
+            const metrics = extractSectionValue('Affected Metrics');
+            const component = extractSectionValue('Component');
+
+            // Build labels to add
+            let labelsToAdd = [];
+            if (category) labelsToAdd.push(category);
+            if (metrics) labelsToAdd.push(metrics);
+            if (component) labelsToAdd.push(component);
+
+            // Get existing labels in the repo
+            const { data: existingLabels } = await github.rest.issues.listLabelsForRepo({
+              owner,
+              repo,
+              per_page: 100
+            });
+            const existingLabelNames = existingLabels.map(l => l.name);
+
+            // Find labels that need to be created
+            const labelsToCreate = labelsToAdd.filter(label => !existingLabelNames.includes(label));
+
+            // Create missing labels (with a default color)
+            for (const label of labelsToCreate) {
+              try {
+                await github.rest.issues.createLabel({
+                  owner,
+                  repo,
+                  name: label,
+                  color: 'ededed' // light gray, you can pick any hex color
+                });
+              } catch (e) {
+                // Ignore if label already exists (race condition), otherwise rethrow
+                if (!e || e.status !== 422) throw e;
+              }
+            }
+
+            // Now apply all labels (they all exist now)
+            if (labelsToAdd.length > 0) {
+              await github.rest.issues.addLabels({
+                owner,
+                repo,
+                issue_number: issueNumber,
+                labels: labelsToAdd
+              });
+            } 

.github/workflows/release.yml

@@ -3,7 +3,7 @@ name: Make release and binaries
 on:
   push:
     tags:
-      - '*'
+      - "v*"
 
 permissions:
   contents: write
@@ -21,32 +21,34 @@ jobs:
         uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
-        run: bun install --no-save --cwd ./hub/site
+        run: bun install --no-save --cwd ./internal/site
 
       - name: Build site
-        run: bun run --cwd ./hub/site build
+        run: bun run --cwd ./internal/site build
 
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
-          go-version: '^1.22.1'
+          go-version: "^1.22.1"
+
+      - name: Set up .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: "9.0.x"
+
+      - name: Build .NET LHM executable for Windows sensors
+        run: |
+          dotnet build -c Release ./agent/lhm/beszel_lhm.csproj
+        shell: bash
 
       - name: GoReleaser beszel
         uses: goreleaser/goreleaser-action@v6
         with:
-          workdir: ./hub
+          workdir: ./
           distribution: goreleaser
           version: latest
           args: release --clean
         env:
-          GITHUB_TOKEN: ${{ secrets.TOKEN }}
-
-      - name: GoReleaser beszel-agent
-        uses: goreleaser/goreleaser-action@v6
-        with:
-          workdir: ./agent
-          distribution: goreleaser
-          version: latest
-          args: release --clean
-        env:
-          GITHUB_TOKEN: ${{ secrets.TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.TOKEN || secrets.GITHUB_TOKEN }}
+          WINGET_TOKEN: ${{ secrets.WINGET_TOKEN }}
+          IS_FORK: ${{ github.repository_owner != 'henrygd' }}

.github/workflows/vulncheck.yml

@@ -0,0 +1,33 @@
+# https://github.com/minio/minio/blob/master/.github/workflows/vulncheck.yml
+
+name: VulnCheck
+on:
+  pull_request:
+    branches:
+      - main
+
+  push:
+    branches:
+      - main
+
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
+jobs:
+  vulncheck:
+    name: VulnCheck
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v4
+      - name: Set up Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.25.x
+          # cached: false
+      - name: Get official govulncheck
+        run: go install golang.org/x/vuln/cmd/govulncheck@latest
+        shell: bash
+      - name: Run govulncheck
+        run: govulncheck -show verbose ./...
+        shell: bash

.gitignore

@@ -3,8 +3,20 @@ pb_data
 data
 temp
 .vscode
-beszel
 beszel-agent
 beszel_data
 beszel_data*
-dist
+dist
+*.exe
+internal/cmd/hub/hub
+internal/cmd/agent/agent
+node_modules
+build
+*timestamp*
+.swc
+internal/site/src/locales/**/*.ts
+*.bak
+__debug_*
+agent/lhm/obj
+agent/lhm/bin
+dockerfile_agent_dev

.goreleaser.yml

@@ -0,0 +1,237 @@
+version: 2
+
+project_name: beszel
+
+before:
+  hooks:
+    - go mod tidy
+
+builds:
+  - id: beszel
+    binary: beszel
+    main: internal/cmd/hub/hub.go
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+    goarch:
+      - amd64
+      - arm64
+      - arm
+
+  - id: beszel-agent
+    binary: beszel-agent
+    main: internal/cmd/agent/agent.go
+    env:
+      - CGO_ENABLED=0
+    goos:
+      - linux
+      - darwin
+      - freebsd
+      - openbsd
+      - windows
+    goarch:
+      - amd64
+      - arm64
+      - arm
+      - mips64
+      - riscv64
+      - mipsle
+      - mips
+      - ppc64le
+    gomips:
+      - hardfloat
+      - softfloat
+    ignore:
+      - goos: freebsd
+        goarch: arm
+      - goos: openbsd
+        goarch: arm
+      - goos: linux
+        goarch: mips64
+        gomips: softfloat
+      - goos: linux
+        goarch: mipsle
+        gomips: hardfloat
+      - goos: linux
+        goarch: mips
+        gomips: hardfloat
+      - goos: windows
+        goarch: arm
+      - goos: darwin
+        goarch: riscv64
+      - goos: windows
+        goarch: riscv64
+
+archives:
+  - id: beszel-agent
+    formats: [tar.gz]
+    ids:
+      - beszel-agent
+    name_template: >-
+      {{ .Binary }}_
+      {{- .Os }}_
+      {{- .Arch }}
+    format_overrides:
+      - goos: windows
+        formats: [zip]
+
+  - id: beszel
+    formats: [tar.gz]
+    ids:
+      - beszel
+    name_template: >-
+      {{ .Binary }}_
+      {{- .Os }}_
+      {{- .Arch }}
+
+nfpms:
+  - id: beszel-agent
+    package_name: beszel-agent
+    description: |-
+      Agent for Beszel
+      Beszel is a lightweight server monitoring platform that includes Docker
+      statistics, historical data, and alert functions. It has a friendly web
+      interface, simple configuration, and is ready to use out of the box.
+      It supports automatic backup, multi-user, OAuth authentication, and
+      API access.
+    maintainer: henrygd <hank@henrygd.me>
+    section: net
+    ids:
+      - beszel-agent
+    formats:
+      - deb
+    contents:
+      - src: ./supplemental/debian/beszel-agent.service
+        dst: lib/systemd/system/beszel-agent.service
+        packager: deb
+      - src: ./supplemental/debian/copyright
+        dst: usr/share/doc/beszel-agent/copyright
+        packager: deb
+      - src: ./supplemental/debian/lintian-overrides
+        dst: usr/share/lintian/overrides/beszel-agent
+        packager: deb
+    scripts:
+      postinstall: ./supplemental/debian/postinstall.sh
+      preremove: ./supplemental/debian/prerm.sh
+      postremove: ./supplemental/debian/postrm.sh
+    deb:
+      predepends:
+        - adduser
+        - debconf
+      scripts:
+        templates: ./supplemental/debian/templates
+        # Currently broken due to a bug in goreleaser
+        # https://github.com/goreleaser/goreleaser/issues/5487
+        #config: ./supplemental/debian/config.sh
+
+scoops:
+  - ids: [beszel-agent]
+    name: beszel-agent
+    repository:
+      owner: henrygd
+      name: beszel-scoops
+    homepage: "https://beszel.dev"
+    description: "Agent for Beszel, a lightweight server monitoring platform."
+    license: MIT
+    skip_upload: '{{ if eq (tolower .Env.IS_FORK) "true" }}true{{ else }}auto{{ end }}'
+
+# # Needs choco installed, so doesn't build on linux / default gh workflow :(
+# chocolateys:
+#   - title: Beszel Agent
+#     ids: [beszel-agent]
+#     package_source_url: https://github.com/henrygd/beszel-chocolatey
+#     owners: henrygd
+#     authors: henrygd
+#     summary: 'Agent for Beszel, a lightweight server monitoring platform.'
+#     description: |
+#       Beszel is a lightweight server monitoring platform that includes Docker statistics, historical data, and alert functions.
+
+#       It has a friendly web interface, simple configuration, and is ready to use out of the box. It supports automatic backup, multi-user, OAuth authentication, and API access.
+#     license_url: https://github.com/henrygd/beszel/blob/main/LICENSE
+#     project_url: https://beszel.dev
+#     project_source_url: https://github.com/henrygd/beszel
+#     docs_url: https://beszel.dev/guide/getting-started
+#     icon_url: https://cdn.jsdelivr.net/gh/selfhst/icons/png/beszel.png
+#     bug_tracker_url: https://github.com/henrygd/beszel/issues
+#     copyright: 2025 henrygd
+#     tags: foss cross-platform admin monitoring
+#     require_license_acceptance: false
+#     release_notes: 'https://github.com/henrygd/beszel/releases/tag/v{{ .Version }}'
+
+brews:
+  - ids: [beszel-agent]
+    name: beszel-agent
+    repository:
+      owner: henrygd
+      name: homebrew-beszel
+    homepage: "https://beszel.dev"
+    description: "Agent for Beszel, a lightweight server monitoring platform."
+    license: MIT
+    skip_upload: '{{ if eq (tolower .Env.IS_FORK) "true" }}true{{ else }}auto{{ end }}'
+    extra_install: |
+      (bin/"beszel-agent-launcher").write <<~EOS
+        #!/bin/bash
+        set -a
+        if [ -f "$HOME/.config/beszel/beszel-agent.env" ]; then
+          source "$HOME/.config/beszel/beszel-agent.env"
+        fi
+        set +a
+        exec #{bin}/beszel-agent "$@"
+      EOS
+      (bin/"beszel-agent-launcher").chmod 0755
+    service: |
+      run ["#{bin}/beszel-agent-launcher"]
+      log_path "#{Dir.home}/.cache/beszel/beszel-agent.log"
+      error_log_path "#{Dir.home}/.cache/beszel/beszel-agent.log"
+      keep_alive true
+      restart_delay 5
+      process_type :background
+
+winget:
+  - ids: [beszel-agent]
+    name: beszel-agent
+    package_identifier: henrygd.beszel-agent
+    publisher: henrygd
+    license: MIT
+    license_url: "https://github.com/henrygd/beszel/blob/main/LICENSE"
+    copyright: "2025 henrygd"
+    homepage: "https://beszel.dev"
+    release_notes_url: "https://github.com/henrygd/beszel/releases/tag/v{{ .Version }}"
+    publisher_support_url: "https://github.com/henrygd/beszel/issues"
+    short_description: "Agent for Beszel, a lightweight server monitoring platform."
+    skip_upload: '{{ if eq (tolower .Env.IS_FORK) "true" }}true{{ else }}auto{{ end }}'
+    description: |
+      Beszel is a lightweight server monitoring platform that includes Docker
+      statistics, historical data, and alert functions. It has a friendly web
+      interface, simple configuration, and is ready to use out of the box.
+      It supports automatic backup, multi-user, OAuth authentication, and
+      API access.
+    tags:
+      - homelab
+      - monitoring
+      - self-hosted
+    repository:
+      owner: henrygd
+      name: beszel-winget
+      branch: henrygd.beszel-agent-{{ .Version }}
+      token: "{{ .Env.WINGET_TOKEN }}"
+      # pull_request:
+      #   enabled: true
+      #   draft: false
+      #   base:
+      #     owner: microsoft
+      #     name: winget-pkgs
+      #     branch: master
+
+release:
+  draft: true
+
+changelog:
+  disable: true
+  sort: asc
+  filters:
+    exclude:
+      - "^docs:"
+      - "^test:"

Makefile

@@ -0,0 +1,102 @@
+# Default OS/ARCH values
+OS ?= $(shell go env GOOS)
+ARCH ?= $(shell go env GOARCH)
+# Skip building the web UI if true
+SKIP_WEB ?= false
+
+# Set executable extension based on target OS
+EXE_EXT := $(if $(filter windows,$(OS)),.exe,)
+
+.PHONY: tidy build-agent build-hub build-hub-dev build clean lint dev-server dev-agent dev-hub dev generate-locales
+.DEFAULT_GOAL := build
+
+clean:
+	go clean
+	rm -rf ./build
+
+lint:
+	golangci-lint run
+
+test: export GOEXPERIMENT=synctest
+test:
+	go test -tags=testing ./...
+
+tidy:
+	go mod tidy
+
+build-web-ui:
+	@if command -v bun >/dev/null 2>&1; then \
+		bun install --cwd ./internal/site && \
+		bun run --cwd ./internal/site build; \
+	else \
+		npm install --prefix ./internal/site && \
+		npm run --prefix ./internal/site build; \
+	fi
+
+# Conditional .NET build - only for Windows
+build-dotnet-conditional:
+	@if [ "$(OS)" = "windows" ]; then \
+		echo "Building .NET executable for Windows..."; \
+		if command -v dotnet >/dev/null 2>&1; then \
+			rm -rf ./agent/lhm/bin; \
+			dotnet build -c Release ./agent/lhm/beszel_lhm.csproj; \
+		else \
+			echo "Error: dotnet not found. Install .NET SDK to build Windows agent."; \
+			exit 1; \
+		fi; \
+	fi
+
+# Update build-agent to include conditional .NET build
+build-agent: tidy build-dotnet-conditional
+	GOOS=$(OS) GOARCH=$(ARCH) go build -o ./build/beszel-agent_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/agent
+
+build-hub: tidy $(if $(filter false,$(SKIP_WEB)),build-web-ui)
+	GOOS=$(OS) GOARCH=$(ARCH) go build -o ./build/beszel_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/hub
+
+build-hub-dev: tidy
+	mkdir -p ./internal/site/dist && touch ./internal/site/dist/index.html
+	GOOS=$(OS) GOARCH=$(ARCH) go build -tags development -o ./build/beszel-dev_$(OS)_$(ARCH)$(EXE_EXT) -ldflags "-w -s" ./internal/cmd/hub
+
+build: build-agent build-hub
+
+generate-locales:
+	@if [ ! -f ./internal/site/src/locales/en/en.ts ]; then \
+		echo "Generating locales..."; \
+		command -v bun >/dev/null 2>&1 && cd ./internal/site && bun install && bun run sync || cd ./internal/site && npm install && npm run sync; \
+	fi
+
+dev-server: generate-locales
+	cd ./internal/site
+	@if command -v bun >/dev/null 2>&1; then \
+		cd ./internal/site && bun run dev --host 0.0.0.0; \
+	else \
+		cd ./internal/site && npm run dev --host 0.0.0.0; \
+	fi
+
+dev-hub: export ENV=dev
+dev-hub:
+	mkdir -p ./internal/site/dist && touch ./internal/site/dist/index.html
+	@if command -v entr >/dev/null 2>&1; then \
+		find ./internal -type f -name '*.go' | entr -r -s "cd ./internal/cmd/hub && go run -tags development . serve --http 0.0.0.0:8090"; \
+	else \
+		cd ./internal/cmd/hub && go run -tags development . serve --http 0.0.0.0:8090; \
+	fi
+
+dev-agent:
+	@if command -v entr >/dev/null 2>&1; then \
+		find ./internal/cmd/agent/*.go ./agent/*.go | entr -r go run github.com/henrygd/beszel/internal/cmd/agent; \
+	else \
+		go run github.com/henrygd/beszel/internal/cmd/agent; \
+	fi
+	
+build-dotnet:
+	@if command -v dotnet >/dev/null 2>&1; then \
+		rm -rf ./agent/lhm/bin; \
+		dotnet build -c Release ./agent/lhm/beszel_lhm.csproj; \
+	else \
+		echo "dotnet not found"; \
+	fi
+
+
+# KEY="..." make -j dev
+dev: dev-server dev-hub dev-agent

SECURITY.md

@@ -0,0 +1,7 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+If you find a vulnerability in the latest version, please [submit a private advisory](https://github.com/henrygd/beszel/security/advisories/new).
+
+If it's low severity (use best judgement) you may open an issue instead of an advisory.

agent/.goreleaser.yml

@@ -1,36 +0,0 @@
-# version: 1
-
-project_name: beszel-agent
-
-before:
-  hooks:
-    - go mod tidy
-
-builds:
-  - env:
-      - CGO_ENABLED=0
-    goos:
-      - linux
-      - darwin
-    goarch:
-      - amd64
-      - arm64
-
-archives:
-  - format: tar.gz
-    name_template: >-
-      {{ .ProjectName }}_
-      {{- .Os }}_
-      {{- .Arch }}
-    # use zip for windows archives
-    format_overrides:
-      - goos: windows
-        format: zip
-
-changelog:
-  disable: true
-  sort: asc
-  filters:
-    exclude:
-      - '^docs:'
-      - '^test:'

agent/agent.go

@@ -0,0 +1,207 @@
+// Package agent implements the Beszel monitoring agent that collects and serves system metrics.
+//
+// The agent runs on monitored systems and communicates collected data
+// to the Beszel hub for centralized monitoring and alerting.
+package agent
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"log/slog"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+
+	"github.com/gliderlabs/ssh"
+	"github.com/henrygd/beszel"
+	"github.com/henrygd/beszel/agent/deltatracker"
+	"github.com/henrygd/beszel/internal/entities/system"
+	"github.com/shirou/gopsutil/v4/host"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+type Agent struct {
+	sync.Mutex                                                                      // Used to lock agent while collecting data
+	debug                     bool                                                  // true if LOG_LEVEL is set to debug
+	zfs                       bool                                                  // true if system has arcstats
+	memCalc                   string                                                // Memory calculation formula
+	fsNames                   []string                                              // List of filesystem device names being monitored
+	fsStats                   map[string]*system.FsStats                            // Keeps track of disk stats for each filesystem
+	diskPrev                  map[uint16]map[string]prevDisk                        // Previous disk I/O counters per cache interval
+	netInterfaces             map[string]struct{}                                   // Stores all valid network interfaces
+	netIoStats                map[uint16]system.NetIoStats                          // Keeps track of bandwidth usage per cache interval
+	netInterfaceDeltaTrackers map[uint16]*deltatracker.DeltaTracker[string, uint64] // Per-cache-time NIC delta trackers
+	dockerManager             *dockerManager                                        // Manages Docker API requests
+	sensorConfig              *SensorConfig                                         // Sensors config
+	systemInfo                system.Info                                           // Host system info
+	gpuManager                *GPUManager                                           // Manages GPU data
+	cache                     *systemDataCache                                      // Cache for system stats based on cache time
+	connectionManager         *ConnectionManager                                    // Channel to signal connection events
+	handlerRegistry           *HandlerRegistry                                      // Registry for routing incoming messages
+	server                    *ssh.Server                                           // SSH server
+	dataDir                   string                                                // Directory for persisting data
+	keys                      []gossh.PublicKey                                     // SSH public keys
+	smartManager              *SmartManager                                         // Manages SMART data
+}
+
+// NewAgent creates a new agent with the given data directory for persisting data.
+// If the data directory is not set, it will attempt to find the optimal directory.
+func NewAgent(dataDir ...string) (agent *Agent, err error) {
+	agent = &Agent{
+		fsStats: make(map[string]*system.FsStats),
+		cache:   NewSystemDataCache(),
+	}
+
+	// Initialize disk I/O previous counters storage
+	agent.diskPrev = make(map[uint16]map[string]prevDisk)
+	// Initialize per-cache-time network tracking structures
+	agent.netIoStats = make(map[uint16]system.NetIoStats)
+	agent.netInterfaceDeltaTrackers = make(map[uint16]*deltatracker.DeltaTracker[string, uint64])
+
+	agent.dataDir, err = getDataDir(dataDir...)
+	if err != nil {
+		slog.Warn("Data directory not found")
+	} else {
+		slog.Info("Data directory", "path", agent.dataDir)
+	}
+
+	agent.memCalc, _ = GetEnv("MEM_CALC")
+	agent.sensorConfig = agent.newSensorConfig()
+	// Set up slog with a log level determined by the LOG_LEVEL env var
+	if logLevelStr, exists := GetEnv("LOG_LEVEL"); exists {
+		switch strings.ToLower(logLevelStr) {
+		case "debug":
+			agent.debug = true
+			slog.SetLogLoggerLevel(slog.LevelDebug)
+		case "warn":
+			slog.SetLogLoggerLevel(slog.LevelWarn)
+		case "error":
+			slog.SetLogLoggerLevel(slog.LevelError)
+		}
+	}
+
+	slog.Debug(beszel.Version)
+
+	// initialize system info
+	agent.initializeSystemInfo()
+
+	// initialize connection manager
+	agent.connectionManager = newConnectionManager(agent)
+
+	// initialize handler registry
+	agent.handlerRegistry = NewHandlerRegistry()
+
+	// initialize disk info
+	agent.initializeDiskInfo()
+
+	// initialize net io stats
+	agent.initializeNetIoStats()
+
+	// initialize docker manager
+	agent.dockerManager = newDockerManager(agent)
+
+	agent.smartManager, err = NewSmartManager()
+	if err != nil {
+		slog.Debug("SMART", "err", err)
+	}
+
+	// initialize GPU manager
+	agent.gpuManager, err = NewGPUManager()
+	if err != nil {
+		slog.Debug("GPU", "err", err)
+	}
+
+	// if debugging, print stats
+	if agent.debug {
+		slog.Debug("Stats", "data", agent.gatherStats(0))
+	}
+
+	return agent, nil
+}
+
+// GetEnv retrieves an environment variable with a "BESZEL_AGENT_" prefix, or falls back to the unprefixed key.
+func GetEnv(key string) (value string, exists bool) {
+	if value, exists = os.LookupEnv("BESZEL_AGENT_" + key); exists {
+		return value, exists
+	}
+	// Fallback to the old unprefixed key
+	return os.LookupEnv(key)
+}
+
+func (a *Agent) gatherStats(cacheTimeMs uint16) *system.CombinedData {
+	a.Lock()
+	defer a.Unlock()
+
+	data, isCached := a.cache.Get(cacheTimeMs)
+	if isCached {
+		slog.Debug("Cached data", "cacheTimeMs", cacheTimeMs)
+		return data
+	}
+
+	*data = system.CombinedData{
+		Stats: a.getSystemStats(cacheTimeMs),
+		Info:  a.systemInfo,
+	}
+	// slog.Info("System data", "data", data, "cacheTimeMs", cacheTimeMs)
+
+	if a.dockerManager != nil {
+		if containerStats, err := a.dockerManager.getDockerStats(cacheTimeMs); err == nil {
+			data.Containers = containerStats
+			slog.Debug("Containers", "data", data.Containers)
+		} else {
+			slog.Debug("Containers", "err", err)
+		}
+	}
+
+	data.Stats.ExtraFs = make(map[string]*system.FsStats)
+	for name, stats := range a.fsStats {
+		if !stats.Root && stats.DiskTotal > 0 {
+			// Use custom name if available, otherwise use device name
+			key := name
+			if stats.Name != "" {
+				key = stats.Name
+			}
+			data.Stats.ExtraFs[key] = stats
+		}
+	}
+	slog.Debug("Extra FS", "data", data.Stats.ExtraFs)
+
+	a.cache.Set(data, cacheTimeMs)
+	return data
+}
+
+// StartAgent initializes and starts the agent with optional WebSocket connection
+func (a *Agent) Start(serverOptions ServerOptions) error {
+	a.keys = serverOptions.Keys
+	return a.connectionManager.Start(serverOptions)
+}
+
+func (a *Agent) getFingerprint() string {
+	// first look for a fingerprint in the data directory
+	if a.dataDir != "" {
+		if fp, err := os.ReadFile(filepath.Join(a.dataDir, "fingerprint")); err == nil {
+			return string(fp)
+		}
+	}
+
+	// if no fingerprint is found, generate one
+	fingerprint, err := host.HostID()
+	if err != nil || fingerprint == "" {
+		fingerprint = a.systemInfo.Hostname + a.systemInfo.CpuModel
+	}
+
+	// hash fingerprint
+	sum := sha256.Sum256([]byte(fingerprint))
+	fingerprint = hex.EncodeToString(sum[:24])
+
+	// save fingerprint to data directory
+	if a.dataDir != "" {
+		err = os.WriteFile(filepath.Join(a.dataDir, "fingerprint"), []byte(fingerprint), 0644)
+		if err != nil {
+			slog.Warn("Failed to save fingerprint", "err", err)
+		}
+	}
+
+	return fingerprint
+}

agent/agent_cache.go

@@ -0,0 +1,55 @@
+package agent
+
+import (
+	"sync"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+)
+
+type systemDataCache struct {
+	sync.RWMutex
+	cache map[uint16]*cacheNode
+}
+
+type cacheNode struct {
+	data       *system.CombinedData
+	lastUpdate time.Time
+}
+
+// NewSystemDataCache creates a cache keyed by the polling interval in milliseconds.
+func NewSystemDataCache() *systemDataCache {
+	return &systemDataCache{
+		cache: make(map[uint16]*cacheNode),
+	}
+}
+
+// Get returns cached combined data when the entry is still considered fresh.
+func (c *systemDataCache) Get(cacheTimeMs uint16) (stats *system.CombinedData, isCached bool) {
+	c.RLock()
+	defer c.RUnlock()
+
+	node, ok := c.cache[cacheTimeMs]
+	if !ok {
+		return &system.CombinedData{}, false
+	}
+	// allowedSkew := time.Second
+	// isFresh := time.Since(node.lastUpdate) < time.Duration(cacheTimeMs)*time.Millisecond-allowedSkew
+	// allow a 50% skew of the cache time
+	isFresh := time.Since(node.lastUpdate) < time.Duration(cacheTimeMs/2)*time.Millisecond
+	return node.data, isFresh
+}
+
+// Set stores the latest combined data snapshot for the given interval.
+func (c *systemDataCache) Set(data *system.CombinedData, cacheTimeMs uint16) {
+	c.Lock()
+	defer c.Unlock()
+
+	node, ok := c.cache[cacheTimeMs]
+	if !ok {
+		node = &cacheNode{}
+		c.cache[cacheTimeMs] = node
+	}
+	node.data = data
+	node.lastUpdate = time.Now()
+}

agent/agent_cache_test.go

@@ -0,0 +1,246 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"testing"
+	"testing/synctest"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/container"
+	"github.com/henrygd/beszel/internal/entities/system"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func createTestCacheData() *system.CombinedData {
+	return &system.CombinedData{
+		Stats: system.Stats{
+			Cpu:       50.5,
+			Mem:       8192,
+			DiskTotal: 100000,
+		},
+		Info: system.Info{
+			Hostname: "test-host",
+		},
+		Containers: []*container.Stats{
+			{
+				Name: "test-container",
+				Cpu:  25.0,
+			},
+		},
+	}
+}
+
+func TestNewSystemDataCache(t *testing.T) {
+	cache := NewSystemDataCache()
+	require.NotNil(t, cache)
+	assert.NotNil(t, cache.cache)
+	assert.Empty(t, cache.cache)
+}
+
+func TestCacheGetSet(t *testing.T) {
+	cache := NewSystemDataCache()
+	data := createTestCacheData()
+
+	// Test setting data
+	cache.Set(data, 1000) // 1 second cache
+
+	// Test getting fresh data
+	retrieved, isCached := cache.Get(1000)
+	assert.True(t, isCached)
+	assert.Equal(t, data, retrieved)
+
+	// Test getting non-existent cache key
+	_, isCached = cache.Get(2000)
+	assert.False(t, isCached)
+}
+
+func TestCacheFreshness(t *testing.T) {
+	cache := NewSystemDataCache()
+	data := createTestCacheData()
+
+	testCases := []struct {
+		name        string
+		cacheTimeMs uint16
+		sleepMs     time.Duration
+		expectFresh bool
+	}{
+		{
+			name:        "fresh data - well within cache time",
+			cacheTimeMs: 1000, // 1 second
+			sleepMs:     100,  // 100ms
+			expectFresh: true,
+		},
+		{
+			name:        "fresh data - at 50% of cache time boundary",
+			cacheTimeMs: 1000, // 1 second, 50% = 500ms
+			sleepMs:     499,  // just under 500ms
+			expectFresh: true,
+		},
+		{
+			name:        "stale data - exactly at 50% cache time",
+			cacheTimeMs: 1000, // 1 second, 50% = 500ms
+			sleepMs:     500,  // exactly 500ms
+			expectFresh: false,
+		},
+		{
+			name:        "stale data - well beyond cache time",
+			cacheTimeMs: 1000, // 1 second
+			sleepMs:     800,  // 800ms
+			expectFresh: false,
+		},
+		{
+			name:        "short cache time",
+			cacheTimeMs: 200, // 200ms, 50% = 100ms
+			sleepMs:     150, // 150ms > 100ms
+			expectFresh: false,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			synctest.Test(t, func(t *testing.T) {
+				// Set data
+				cache.Set(data, tc.cacheTimeMs)
+
+				// Wait for the specified duration
+				if tc.sleepMs > 0 {
+					time.Sleep(tc.sleepMs * time.Millisecond)
+				}
+
+				// Check freshness
+				_, isCached := cache.Get(tc.cacheTimeMs)
+				assert.Equal(t, tc.expectFresh, isCached)
+			})
+		})
+	}
+}
+
+func TestCacheMultipleIntervals(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		cache := NewSystemDataCache()
+		data1 := createTestCacheData()
+		data2 := &system.CombinedData{
+			Stats: system.Stats{
+				Cpu: 75.0,
+				Mem: 16384,
+			},
+			Info: system.Info{
+				Hostname: "test-host-2",
+			},
+			Containers: []*container.Stats{},
+		}
+
+		// Set data for different intervals
+		cache.Set(data1, 500)  // 500ms cache
+		cache.Set(data2, 1000) // 1000ms cache
+
+		// Both should be fresh immediately
+		retrieved1, isCached1 := cache.Get(500)
+		assert.True(t, isCached1)
+		assert.Equal(t, data1, retrieved1)
+
+		retrieved2, isCached2 := cache.Get(1000)
+		assert.True(t, isCached2)
+		assert.Equal(t, data2, retrieved2)
+
+		// Wait 300ms - 500ms cache should be stale (250ms threshold), 1000ms should still be fresh (500ms threshold)
+		time.Sleep(300 * time.Millisecond)
+
+		_, isCached1 = cache.Get(500)
+		assert.False(t, isCached1)
+
+		_, isCached2 = cache.Get(1000)
+		assert.True(t, isCached2)
+
+		// Wait another 300ms (total 600ms) - now 1000ms cache should also be stale
+		time.Sleep(300 * time.Millisecond)
+		_, isCached2 = cache.Get(1000)
+		assert.False(t, isCached2)
+	})
+}
+
+func TestCacheOverwrite(t *testing.T) {
+	cache := NewSystemDataCache()
+	data1 := createTestCacheData()
+	data2 := &system.CombinedData{
+		Stats: system.Stats{
+			Cpu: 90.0,
+			Mem: 32768,
+		},
+		Info: system.Info{
+			Hostname: "updated-host",
+		},
+		Containers: []*container.Stats{},
+	}
+
+	// Set initial data
+	cache.Set(data1, 1000)
+	retrieved, isCached := cache.Get(1000)
+	assert.True(t, isCached)
+	assert.Equal(t, data1, retrieved)
+
+	// Overwrite with new data
+	cache.Set(data2, 1000)
+	retrieved, isCached = cache.Get(1000)
+	assert.True(t, isCached)
+	assert.Equal(t, data2, retrieved)
+	assert.NotEqual(t, data1, retrieved)
+}
+
+func TestCacheMiss(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		cache := NewSystemDataCache()
+
+		// Test getting from empty cache
+		_, isCached := cache.Get(1000)
+		assert.False(t, isCached)
+
+		// Set data for one interval
+		data := createTestCacheData()
+		cache.Set(data, 1000)
+
+		// Test getting different interval
+		_, isCached = cache.Get(2000)
+		assert.False(t, isCached)
+
+		// Test getting after data has expired
+		time.Sleep(600 * time.Millisecond) // 600ms > 500ms (50% of 1000ms)
+		_, isCached = cache.Get(1000)
+		assert.False(t, isCached)
+	})
+}
+
+func TestCacheZeroInterval(t *testing.T) {
+	cache := NewSystemDataCache()
+	data := createTestCacheData()
+
+	// Set with zero interval - should allow immediate cache
+	cache.Set(data, 0)
+
+	// With 0 interval, 50% is 0, so it should never be considered fresh
+	// (time.Since(lastUpdate) >= 0, which is not < 0)
+	_, isCached := cache.Get(0)
+	assert.False(t, isCached)
+}
+
+func TestCacheLargeInterval(t *testing.T) {
+	synctest.Test(t, func(t *testing.T) {
+		cache := NewSystemDataCache()
+		data := createTestCacheData()
+
+		// Test with maximum uint16 value
+		cache.Set(data, 65535) // ~65 seconds
+
+		// Should be fresh immediately
+		_, isCached := cache.Get(65535)
+		assert.True(t, isCached)
+
+		// Should still be fresh after a short time
+		time.Sleep(100 * time.Millisecond)
+		_, isCached = cache.Get(65535)
+		assert.True(t, isCached)
+	})
+}

agent/agent_test_helpers.go

@@ -0,0 +1,9 @@
+//go:build testing
+// +build testing
+
+package agent
+
+// TESTING ONLY: GetConnectionManager is a helper function to get the connection manager for testing.
+func (a *Agent) GetConnectionManager() *ConnectionManager {
+	return a.connectionManager
+}

agent/battery/battery.go

@@ -0,0 +1,77 @@
+//go:build !freebsd
+
+// Package battery provides functions to check if the system has a battery and to get the battery stats.
+package battery
+
+import (
+	"errors"
+	"log/slog"
+
+	"github.com/distatus/battery"
+)
+
+var systemHasBattery = false
+var haveCheckedBattery = false
+
+// HasReadableBattery checks if the system has a battery and returns true if it does.
+func HasReadableBattery() bool {
+	if haveCheckedBattery {
+		return systemHasBattery
+	}
+	haveCheckedBattery = true
+	batteries, err := battery.GetAll()
+	for _, bat := range batteries {
+		if bat.Full > 0 {
+			systemHasBattery = true
+			break
+		}
+	}
+	if !systemHasBattery {
+		slog.Debug("No battery found", "err", err)
+	}
+	return systemHasBattery
+}
+
+// GetBatteryStats returns the current battery percent and charge state
+// percent = (current charge of all batteries) / (sum of designed/full capacity of all batteries)
+func GetBatteryStats() (batteryPercent uint8, batteryState uint8, err error) {
+	if !HasReadableBattery() {
+		return batteryPercent, batteryState, errors.ErrUnsupported
+	}
+	batteries, err := battery.GetAll()
+	// we'll handle errors later by skipping batteries with errors, rather
+	// than skipping everything because of the presence of some errors.
+	if len(batteries) == 0 {
+		return batteryPercent, batteryState, errors.New("no batteries")
+	}
+
+	totalCapacity := float64(0)
+	totalCharge := float64(0)
+	errs, partialErrs := err.(battery.Errors)
+
+	for i, bat := range batteries {
+		if partialErrs && errs[i] != nil {
+			// if there were some errors, like missing data, skip it
+			continue
+		}
+		if bat.Full == 0 {
+			// skip batteries with no capacity. Charge is unlikely to ever be zero, but
+			// we can't guarantee that, so don't skip based on charge.
+			continue
+		}
+		totalCapacity += bat.Full
+		totalCharge += bat.Current
+	}
+
+	if totalCapacity == 0 {
+		// for macs there's sometimes a ghost battery with 0 capacity
+		// https://github.com/distatus/battery/issues/34
+		// Instead of skipping over those batteries, we'll check for total 0 capacity
+		// and return an error. This also prevents a divide by zero.
+		return batteryPercent, batteryState, errors.New("no battery capacity")
+	}
+
+	batteryPercent = uint8(totalCharge / totalCapacity * 100)
+	batteryState = uint8(batteries[0].State.Raw)
+	return batteryPercent, batteryState, nil
+}

agent/battery/battery_freebsd.go

@@ -0,0 +1,13 @@
+//go:build freebsd
+
+package battery
+
+import "errors"
+
+func HasReadableBattery() bool {
+	return false
+}
+
+func GetBatteryStats() (uint8, uint8, error) {
+	return 0, 0, errors.ErrUnsupported
+}

agent/client.go

@@ -0,0 +1,307 @@
+package agent
+
+import (
+	"crypto/tls"
+	"errors"
+	"fmt"
+	"log/slog"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"path"
+	"strings"
+	"time"
+
+	"github.com/henrygd/beszel"
+	"github.com/henrygd/beszel/internal/common"
+	"github.com/henrygd/beszel/internal/entities/smart"
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/lxzan/gws"
+	"golang.org/x/crypto/ssh"
+)
+
+const (
+	wsDeadline = 70 * time.Second
+)
+
+// WebSocketClient manages the WebSocket connection between the agent and hub.
+// It handles authentication, message routing, and connection lifecycle management.
+type WebSocketClient struct {
+	gws.BuiltinEventHandler
+	options            *gws.ClientOption                   // WebSocket client configuration options
+	agent              *Agent                              // Reference to the parent agent
+	Conn               *gws.Conn                           // Active WebSocket connection
+	hubURL             *url.URL                            // Parsed hub URL for connection
+	token              string                              // Authentication token for hub registration
+	fingerprint        string                              // System fingerprint for identification
+	hubRequest         *common.HubRequest[cbor.RawMessage] // Reusable request structure for message parsing
+	lastConnectAttempt time.Time                           // Timestamp of last connection attempt
+	hubVerified        bool                                // Whether the hub has been cryptographically verified
+}
+
+// newWebSocketClient creates a new WebSocket client for the given agent.
+// It reads configuration from environment variables and validates the hub URL.
+func newWebSocketClient(agent *Agent) (client *WebSocketClient, err error) {
+	hubURLStr, exists := GetEnv("HUB_URL")
+	if !exists {
+		return nil, errors.New("HUB_URL environment variable not set")
+	}
+
+	client = &WebSocketClient{}
+
+	client.hubURL, err = url.Parse(hubURLStr)
+	if err != nil {
+		return nil, errors.New("invalid hub URL")
+	}
+	// get registration token
+	client.token, err = getToken()
+	if err != nil {
+		return nil, err
+	}
+
+	client.agent = agent
+	client.hubRequest = &common.HubRequest[cbor.RawMessage]{}
+	client.fingerprint = agent.getFingerprint()
+
+	return client, nil
+}
+
+// getToken returns the token for the WebSocket client.
+// It first checks the TOKEN environment variable, then the TOKEN_FILE environment variable.
+// If neither is set, it returns an error.
+func getToken() (string, error) {
+	// get token from env var
+	token, _ := GetEnv("TOKEN")
+	if token != "" {
+		return token, nil
+	}
+	// get token from file
+	tokenFile, _ := GetEnv("TOKEN_FILE")
+	if tokenFile == "" {
+		return "", errors.New("must set TOKEN or TOKEN_FILE")
+	}
+	tokenBytes, err := os.ReadFile(tokenFile)
+	if err != nil {
+		return "", err
+	}
+	return strings.TrimSpace(string(tokenBytes)), nil
+}
+
+// getOptions returns the WebSocket client options, creating them if necessary.
+// It configures the connection URL, TLS settings, and authentication headers.
+func (client *WebSocketClient) getOptions() *gws.ClientOption {
+	if client.options != nil {
+		return client.options
+	}
+
+	// update the hub url to use websocket scheme and api path
+	if client.hubURL.Scheme == "https" {
+		client.hubURL.Scheme = "wss"
+	} else {
+		client.hubURL.Scheme = "ws"
+	}
+	client.hubURL.Path = path.Join(client.hubURL.Path, "api/beszel/agent-connect")
+
+	client.options = &gws.ClientOption{
+		Addr:      client.hubURL.String(),
+		TlsConfig: &tls.Config{InsecureSkipVerify: true},
+		RequestHeader: http.Header{
+			"User-Agent": []string{getUserAgent()},
+			"X-Token":    []string{client.token},
+			"X-Beszel":   []string{beszel.Version},
+		},
+	}
+	return client.options
+}
+
+// Connect establishes a WebSocket connection to the hub.
+// It closes any existing connection before attempting to reconnect.
+func (client *WebSocketClient) Connect() (err error) {
+	client.lastConnectAttempt = time.Now()
+
+	// make sure previous connection is closed
+	client.Close()
+
+	client.Conn, _, err = gws.NewClient(client, client.getOptions())
+	if err != nil {
+		return err
+	}
+
+	go client.Conn.ReadLoop()
+
+	return nil
+}
+
+// OnOpen handles WebSocket connection establishment.
+// It sets a deadline for the connection to prevent hanging.
+func (client *WebSocketClient) OnOpen(conn *gws.Conn) {
+	conn.SetDeadline(time.Now().Add(wsDeadline))
+}
+
+// OnClose handles WebSocket connection closure.
+// It logs the closure reason and notifies the connection manager.
+func (client *WebSocketClient) OnClose(conn *gws.Conn, err error) {
+	if err != nil {
+		slog.Warn("Connection closed", "err", strings.TrimPrefix(err.Error(), "gws: "))
+	}
+	client.agent.connectionManager.eventChan <- WebSocketDisconnect
+}
+
+// OnMessage handles incoming WebSocket messages from the hub.
+// It decodes CBOR messages and routes them to appropriate handlers.
+func (client *WebSocketClient) OnMessage(conn *gws.Conn, message *gws.Message) {
+	defer message.Close()
+	conn.SetDeadline(time.Now().Add(wsDeadline))
+
+	if message.Opcode != gws.OpcodeBinary {
+		return
+	}
+
+	var HubRequest common.HubRequest[cbor.RawMessage]
+
+	err := cbor.Unmarshal(message.Data.Bytes(), &HubRequest)
+	if err != nil {
+		slog.Error("Error parsing message", "err", err)
+		return
+	}
+
+	if err := client.handleHubRequest(&HubRequest, HubRequest.Id); err != nil {
+		slog.Error("Error handling message", "err", err)
+	}
+}
+
+// OnPing handles WebSocket ping frames.
+// It responds with a pong and updates the connection deadline.
+func (client *WebSocketClient) OnPing(conn *gws.Conn, message []byte) {
+	conn.SetDeadline(time.Now().Add(wsDeadline))
+	conn.WritePong(message)
+}
+
+// handleAuthChallenge verifies the authenticity of the hub and returns the system's fingerprint.
+func (client *WebSocketClient) handleAuthChallenge(msg *common.HubRequest[cbor.RawMessage], requestID *uint32) (err error) {
+	var authRequest common.FingerprintRequest
+	if err := cbor.Unmarshal(msg.Data, &authRequest); err != nil {
+		return err
+	}
+
+	if err := client.verifySignature(authRequest.Signature); err != nil {
+		return err
+	}
+
+	client.hubVerified = true
+	client.agent.connectionManager.eventChan <- WebSocketConnect
+
+	response := &common.FingerprintResponse{
+		Fingerprint: client.fingerprint,
+	}
+
+	if authRequest.NeedSysInfo {
+		response.Name, _ = GetEnv("SYSTEM_NAME")
+		response.Hostname = client.agent.systemInfo.Hostname
+		serverAddr := client.agent.connectionManager.serverOptions.Addr
+		_, response.Port, _ = net.SplitHostPort(serverAddr)
+	}
+
+	return client.sendResponse(response, requestID)
+}
+
+// verifySignature verifies the signature of the token using the public keys.
+func (client *WebSocketClient) verifySignature(signature []byte) (err error) {
+	for _, pubKey := range client.agent.keys {
+		sig := ssh.Signature{
+			Format: pubKey.Type(),
+			Blob:   signature,
+		}
+		if err = pubKey.Verify([]byte(client.token), &sig); err == nil {
+			return nil
+		}
+	}
+	return errors.New("invalid signature - check KEY value")
+}
+
+// Close closes the WebSocket connection gracefully.
+// This method is safe to call multiple times.
+func (client *WebSocketClient) Close() {
+	if client.Conn != nil {
+		_ = client.Conn.WriteClose(1000, nil)
+	}
+}
+
+// handleHubRequest routes the request to the appropriate handler using the handler registry.
+func (client *WebSocketClient) handleHubRequest(msg *common.HubRequest[cbor.RawMessage], requestID *uint32) error {
+	ctx := &HandlerContext{
+		Client:       client,
+		Agent:        client.agent,
+		Request:      msg,
+		RequestID:    requestID,
+		HubVerified:  client.hubVerified,
+		SendResponse: client.sendResponse,
+	}
+	return client.agent.handlerRegistry.Handle(ctx)
+}
+
+// sendMessage encodes the given data to CBOR and sends it as a binary message over the WebSocket connection to the hub.
+func (client *WebSocketClient) sendMessage(data any) error {
+	bytes, err := cbor.Marshal(data)
+	if err != nil {
+		return err
+	}
+	err = client.Conn.WriteMessage(gws.OpcodeBinary, bytes)
+	if err != nil {
+		// If writing fails (e.g., broken pipe due to network issues),
+		// close the connection to trigger reconnection logic (#1263)
+		client.Close()
+	}
+	return err
+}
+
+// sendResponse sends a response with optional request ID for the new protocol
+func (client *WebSocketClient) sendResponse(data any, requestID *uint32) error {
+	if requestID != nil {
+		// New format with ID - use typed fields
+		response := common.AgentResponse{
+			Id: requestID,
+		}
+
+		// Set the appropriate typed field based on data type
+		switch v := data.(type) {
+		case *system.CombinedData:
+			response.SystemData = v
+		case *common.FingerprintResponse:
+			response.Fingerprint = v
+		case string:
+			response.String = &v
+		case map[string]smart.SmartData:
+			response.SmartData = v
+		// case []byte:
+		// 	response.RawBytes = v
+		// case string:
+		// 	response.RawBytes = []byte(v)
+		default:
+			// For any other type, convert to error
+			response.Error = fmt.Sprintf("unsupported response type: %T", data)
+		}
+
+		return client.sendMessage(response)
+	} else {
+		// Legacy format - send data directly
+		return client.sendMessage(data)
+	}
+}
+
+// getUserAgent returns one of two User-Agent strings based on current time.
+// This is used to avoid being blocked by Cloudflare or other anti-bot measures.
+func getUserAgent() string {
+	const (
+		uaBase    = "Mozilla/5.0 (%s) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"
+		uaWindows = "Windows NT 11.0; Win64; x64"
+		uaMac     = "Macintosh; Intel Mac OS X 14_0_0"
+	)
+	if time.Now().UnixNano()%2 == 0 {
+		return fmt.Sprintf(uaBase, uaWindows)
+	}
+	return fmt.Sprintf(uaBase, uaMac)
+}

agent/client_test.go

@@ -0,0 +1,561 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"crypto/ed25519"
+	"net/url"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/henrygd/beszel"
+
+	"github.com/henrygd/beszel/internal/common"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/ssh"
+)
+
+// TestNewWebSocketClient tests WebSocket client creation
+func TestNewWebSocketClient(t *testing.T) {
+	agent := createTestAgent(t)
+
+	testCases := []struct {
+		name        string
+		hubURL      string
+		token       string
+		expectError bool
+		errorMsg    string
+	}{
+		{
+			name:        "valid configuration",
+			hubURL:      "http://localhost:8080",
+			token:       "test-token-123",
+			expectError: false,
+		},
+		{
+			name:        "valid https URL",
+			hubURL:      "https://hub.example.com",
+			token:       "secure-token",
+			expectError: false,
+		},
+		{
+			name:        "missing hub URL",
+			hubURL:      "",
+			token:       "test-token",
+			expectError: true,
+			errorMsg:    "HUB_URL environment variable not set",
+		},
+		{
+			name:        "invalid URL",
+			hubURL:      "ht\ttp://invalid",
+			token:       "test-token",
+			expectError: true,
+			errorMsg:    "invalid hub URL",
+		},
+		{
+			name:        "missing token",
+			hubURL:      "http://localhost:8080",
+			token:       "",
+			expectError: true,
+			errorMsg:    "must set TOKEN or TOKEN_FILE",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Set up environment
+			if tc.hubURL != "" {
+				os.Setenv("BESZEL_AGENT_HUB_URL", tc.hubURL)
+			} else {
+				os.Unsetenv("BESZEL_AGENT_HUB_URL")
+			}
+			if tc.token != "" {
+				os.Setenv("BESZEL_AGENT_TOKEN", tc.token)
+			} else {
+				os.Unsetenv("BESZEL_AGENT_TOKEN")
+			}
+			defer func() {
+				os.Unsetenv("BESZEL_AGENT_HUB_URL")
+				os.Unsetenv("BESZEL_AGENT_TOKEN")
+			}()
+
+			client, err := newWebSocketClient(agent)
+
+			if tc.expectError {
+				assert.Error(t, err)
+				if err != nil && tc.errorMsg != "" {
+					assert.Contains(t, err.Error(), tc.errorMsg)
+				}
+				assert.Nil(t, client)
+			} else {
+				require.NoError(t, err)
+				assert.NotNil(t, client)
+				assert.Equal(t, agent, client.agent)
+				assert.Equal(t, tc.token, client.token)
+				assert.Equal(t, tc.hubURL, client.hubURL.String())
+				assert.NotEmpty(t, client.fingerprint)
+				assert.NotNil(t, client.hubRequest)
+			}
+		})
+	}
+}
+
+// TestWebSocketClient_GetOptions tests WebSocket client options configuration
+func TestWebSocketClient_GetOptions(t *testing.T) {
+	agent := createTestAgent(t)
+
+	testCases := []struct {
+		name           string
+		inputURL       string
+		expectedScheme string
+		expectedPath   string
+	}{
+		{
+			name:           "http to ws conversion",
+			inputURL:       "http://localhost:8080",
+			expectedScheme: "ws",
+			expectedPath:   "/api/beszel/agent-connect",
+		},
+		{
+			name:           "https to wss conversion",
+			inputURL:       "https://hub.example.com",
+			expectedScheme: "wss",
+			expectedPath:   "/api/beszel/agent-connect",
+		},
+		{
+			name:           "existing path preservation",
+			inputURL:       "http://localhost:8080/custom/path",
+			expectedScheme: "ws",
+			expectedPath:   "/custom/path/api/beszel/agent-connect",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Set up environment
+			os.Setenv("BESZEL_AGENT_HUB_URL", tc.inputURL)
+			os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+			defer func() {
+				os.Unsetenv("BESZEL_AGENT_HUB_URL")
+				os.Unsetenv("BESZEL_AGENT_TOKEN")
+			}()
+
+			client, err := newWebSocketClient(agent)
+			require.NoError(t, err)
+
+			options := client.getOptions()
+
+			// Parse the WebSocket URL
+			wsURL, err := url.Parse(options.Addr)
+			require.NoError(t, err)
+
+			assert.Equal(t, tc.expectedScheme, wsURL.Scheme)
+			assert.Equal(t, tc.expectedPath, wsURL.Path)
+
+			// Check headers
+			assert.Equal(t, "test-token", options.RequestHeader.Get("X-Token"))
+			assert.Equal(t, beszel.Version, options.RequestHeader.Get("X-Beszel"))
+			assert.Contains(t, options.RequestHeader.Get("User-Agent"), "Mozilla/5.0")
+
+			// Test options caching
+			options2 := client.getOptions()
+			assert.Same(t, options, options2, "Options should be cached")
+		})
+	}
+}
+
+// TestWebSocketClient_VerifySignature tests signature verification
+func TestWebSocketClient_VerifySignature(t *testing.T) {
+	agent := createTestAgent(t)
+
+	// Generate test key pairs
+	_, goodPrivKey, err := ed25519.GenerateKey(nil)
+	require.NoError(t, err)
+	goodPubKey, err := ssh.NewPublicKey(goodPrivKey.Public().(ed25519.PublicKey))
+	require.NoError(t, err)
+
+	_, badPrivKey, err := ed25519.GenerateKey(nil)
+	require.NoError(t, err)
+	badPubKey, err := ssh.NewPublicKey(badPrivKey.Public().(ed25519.PublicKey))
+	require.NoError(t, err)
+
+	// Set up environment
+	os.Setenv("BESZEL_AGENT_HUB_URL", "http://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	client, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+
+	testCases := []struct {
+		name        string
+		keys        []ssh.PublicKey
+		token       string
+		signWith    ed25519.PrivateKey
+		expectError bool
+	}{
+		{
+			name:        "valid signature with correct key",
+			keys:        []ssh.PublicKey{goodPubKey},
+			token:       "test-token",
+			signWith:    goodPrivKey,
+			expectError: false,
+		},
+		{
+			name:        "invalid signature with wrong key",
+			keys:        []ssh.PublicKey{goodPubKey},
+			token:       "test-token",
+			signWith:    badPrivKey,
+			expectError: true,
+		},
+		{
+			name:        "valid signature with multiple keys",
+			keys:        []ssh.PublicKey{badPubKey, goodPubKey},
+			token:       "test-token",
+			signWith:    goodPrivKey,
+			expectError: false,
+		},
+		{
+			name:        "no valid keys",
+			keys:        []ssh.PublicKey{badPubKey},
+			token:       "test-token",
+			signWith:    goodPrivKey,
+			expectError: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Set up agent with test keys
+			agent.keys = tc.keys
+			client.token = tc.token
+
+			// Create signature
+			signature := ed25519.Sign(tc.signWith, []byte(tc.token))
+
+			err := client.verifySignature(signature)
+
+			if tc.expectError {
+				assert.Error(t, err)
+				assert.Contains(t, err.Error(), "invalid signature")
+			} else {
+				assert.NoError(t, err)
+			}
+		})
+	}
+}
+
+// TestWebSocketClient_HandleHubRequest tests hub request routing (basic verification logic)
+func TestWebSocketClient_HandleHubRequest(t *testing.T) {
+	agent := createTestAgent(t)
+
+	// Set up environment
+	os.Setenv("BESZEL_AGENT_HUB_URL", "http://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	client, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+
+	testCases := []struct {
+		name        string
+		action      common.WebSocketAction
+		hubVerified bool
+		expectError bool
+		errorMsg    string
+	}{
+		{
+			name:        "CheckFingerprint without verification",
+			action:      common.CheckFingerprint,
+			hubVerified: false,
+			expectError: false, // CheckFingerprint is allowed without verification
+		},
+		{
+			name:        "GetData without verification",
+			action:      common.GetData,
+			hubVerified: false,
+			expectError: true,
+			errorMsg:    "hub not verified",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			client.hubVerified = tc.hubVerified
+
+			// Create minimal request
+			hubRequest := &common.HubRequest[cbor.RawMessage]{
+				Action: tc.action,
+				Data:   cbor.RawMessage{},
+			}
+
+			err := client.handleHubRequest(hubRequest, nil)
+
+			if tc.expectError {
+				assert.Error(t, err)
+				if tc.errorMsg != "" {
+					assert.Contains(t, err.Error(), tc.errorMsg)
+				}
+			} else {
+				// For CheckFingerprint, we expect a decode error since we're not providing valid data,
+				// but it shouldn't be the "hub not verified" error
+				if err != nil && tc.errorMsg != "" {
+					assert.NotContains(t, err.Error(), tc.errorMsg)
+				}
+			}
+		})
+	}
+}
+
+// TestWebSocketClient_GetUserAgent tests user agent generation
+func TestGetUserAgent(t *testing.T) {
+	// Run multiple times to check both variants
+	userAgents := make(map[string]bool)
+
+	for range 20 {
+		ua := getUserAgent()
+		userAgents[ua] = true
+
+		// Check that it's a valid Mozilla user agent
+		assert.Contains(t, ua, "Mozilla/5.0")
+		assert.Contains(t, ua, "AppleWebKit/537.36")
+		assert.Contains(t, ua, "Chrome/124.0.0.0")
+		assert.Contains(t, ua, "Safari/537.36")
+
+		// Should contain either Windows or Mac
+		isWindows := strings.Contains(ua, "Windows NT 11.0")
+		isMac := strings.Contains(ua, "Macintosh; Intel Mac OS X 14_0_0")
+		assert.True(t, isWindows || isMac, "User agent should contain either Windows or Mac identifier")
+	}
+
+	// With enough iterations, we should see both variants
+	// though this might occasionally fail
+	if len(userAgents) == 1 {
+		t.Log("Note: Only one user agent variant was generated in this test run")
+	}
+}
+
+// TestWebSocketClient_Close tests connection closing
+func TestWebSocketClient_Close(t *testing.T) {
+	agent := createTestAgent(t)
+
+	// Set up environment
+	os.Setenv("BESZEL_AGENT_HUB_URL", "http://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	client, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+
+	// Test closing with nil connection (should not panic)
+	assert.NotPanics(t, func() {
+		client.Close()
+	})
+}
+
+// TestWebSocketClient_ConnectRateLimit tests connection rate limiting
+func TestWebSocketClient_ConnectRateLimit(t *testing.T) {
+	agent := createTestAgent(t)
+
+	// Set up environment
+	os.Setenv("BESZEL_AGENT_HUB_URL", "http://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	client, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+
+	// Set recent connection attempt
+	client.lastConnectAttempt = time.Now()
+
+	// Test that connection fails quickly due to rate limiting
+	// This won't actually connect but should fail fast
+	err = client.Connect()
+	assert.Error(t, err, "Connection should fail but not hang")
+}
+
+// TestGetToken tests the getToken function with various scenarios
+func TestGetToken(t *testing.T) {
+	unsetEnvVars := func() {
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+		os.Unsetenv("TOKEN")
+		os.Unsetenv("BESZEL_AGENT_TOKEN_FILE")
+		os.Unsetenv("TOKEN_FILE")
+	}
+
+	t.Run("token from TOKEN environment variable", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Set TOKEN env var
+		expectedToken := "test-token-from-env"
+		os.Setenv("TOKEN", expectedToken)
+		defer os.Unsetenv("TOKEN")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, expectedToken, token)
+	})
+
+	t.Run("token from BESZEL_AGENT_TOKEN environment variable", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Set BESZEL_AGENT_TOKEN env var (should take precedence)
+		expectedToken := "test-token-from-beszel-env"
+		os.Setenv("BESZEL_AGENT_TOKEN", expectedToken)
+		defer os.Unsetenv("BESZEL_AGENT_TOKEN")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, expectedToken, token)
+	})
+
+	t.Run("token from TOKEN_FILE", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Create a temporary token file
+		expectedToken := "test-token-from-file"
+		tokenFile, err := os.CreateTemp("", "token-test-*.txt")
+		require.NoError(t, err)
+		defer os.Remove(tokenFile.Name())
+
+		_, err = tokenFile.WriteString(expectedToken)
+		require.NoError(t, err)
+		tokenFile.Close()
+
+		// Set TOKEN_FILE env var
+		os.Setenv("TOKEN_FILE", tokenFile.Name())
+		defer os.Unsetenv("TOKEN_FILE")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, expectedToken, token)
+	})
+
+	t.Run("token from BESZEL_AGENT_TOKEN_FILE", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Create a temporary token file
+		expectedToken := "test-token-from-beszel-file"
+		tokenFile, err := os.CreateTemp("", "token-test-*.txt")
+		require.NoError(t, err)
+		defer os.Remove(tokenFile.Name())
+
+		_, err = tokenFile.WriteString(expectedToken)
+		require.NoError(t, err)
+		tokenFile.Close()
+
+		// Set BESZEL_AGENT_TOKEN_FILE env var (should take precedence)
+		os.Setenv("BESZEL_AGENT_TOKEN_FILE", tokenFile.Name())
+		defer os.Unsetenv("BESZEL_AGENT_TOKEN_FILE")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, expectedToken, token)
+	})
+
+	t.Run("TOKEN takes precedence over TOKEN_FILE", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Create a temporary token file
+		fileToken := "token-from-file"
+		tokenFile, err := os.CreateTemp("", "token-test-*.txt")
+		require.NoError(t, err)
+		defer os.Remove(tokenFile.Name())
+
+		_, err = tokenFile.WriteString(fileToken)
+		require.NoError(t, err)
+		tokenFile.Close()
+
+		// Set both TOKEN and TOKEN_FILE
+		envToken := "token-from-env"
+		os.Setenv("TOKEN", envToken)
+		os.Setenv("TOKEN_FILE", tokenFile.Name())
+		defer func() {
+			os.Unsetenv("TOKEN")
+			os.Unsetenv("TOKEN_FILE")
+		}()
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, envToken, token, "TOKEN should take precedence over TOKEN_FILE")
+	})
+
+	t.Run("error when neither TOKEN nor TOKEN_FILE is set", func(t *testing.T) {
+		unsetEnvVars()
+
+		token, err := getToken()
+		assert.Error(t, err)
+		assert.Equal(t, "", token)
+		assert.Contains(t, err.Error(), "must set TOKEN or TOKEN_FILE")
+	})
+
+	t.Run("error when TOKEN_FILE points to non-existent file", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Set TOKEN_FILE to a non-existent file
+		os.Setenv("TOKEN_FILE", "/non/existent/file.txt")
+		defer os.Unsetenv("TOKEN_FILE")
+
+		token, err := getToken()
+		assert.Error(t, err)
+		assert.Equal(t, "", token)
+		assert.Contains(t, err.Error(), "no such file or directory")
+	})
+
+	t.Run("handles empty token file", func(t *testing.T) {
+		unsetEnvVars()
+
+		// Create an empty token file
+		tokenFile, err := os.CreateTemp("", "token-test-*.txt")
+		require.NoError(t, err)
+		defer os.Remove(tokenFile.Name())
+		tokenFile.Close()
+
+		// Set TOKEN_FILE env var
+		os.Setenv("TOKEN_FILE", tokenFile.Name())
+		defer os.Unsetenv("TOKEN_FILE")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, "", token, "Empty file should return empty string")
+	})
+
+	t.Run("strips whitespace from TOKEN_FILE", func(t *testing.T) {
+		unsetEnvVars()
+
+		tokenWithWhitespace := "  test-token-with-whitespace  \n\t"
+		expectedToken := "test-token-with-whitespace"
+		tokenFile, err := os.CreateTemp("", "token-test-*.txt")
+		require.NoError(t, err)
+		defer os.Remove(tokenFile.Name())
+
+		_, err = tokenFile.WriteString(tokenWithWhitespace)
+		require.NoError(t, err)
+		tokenFile.Close()
+
+		os.Setenv("TOKEN_FILE", tokenFile.Name())
+		defer os.Unsetenv("TOKEN_FILE")
+
+		token, err := getToken()
+		assert.NoError(t, err)
+		assert.Equal(t, expectedToken, token, "Whitespace should be stripped from token file content")
+	})
+}

agent/connection_manager.go

@@ -0,0 +1,226 @@
+package agent
+
+import (
+	"errors"
+	"log/slog"
+	"os"
+	"os/signal"
+	"syscall"
+	"time"
+
+	"github.com/henrygd/beszel/agent/health"
+	"github.com/henrygd/beszel/internal/entities/system"
+)
+
+// ConnectionManager manages the connection state and events for the agent.
+// It handles both WebSocket and SSH connections, automatically switching between
+// them based on availability and managing reconnection attempts.
+type ConnectionManager struct {
+	agent          *Agent               // Reference to the parent agent
+	State          ConnectionState      // Current connection state
+	eventChan      chan ConnectionEvent // Channel for connection events
+	wsClient       *WebSocketClient     // WebSocket client for hub communication
+	serverOptions  ServerOptions        // Configuration for SSH server
+	wsTicker       *time.Ticker         // Ticker for WebSocket connection attempts
+	isConnecting   bool                 // Prevents multiple simultaneous reconnection attempts
+	ConnectionType system.ConnectionType
+}
+
+// ConnectionState represents the current connection state of the agent.
+type ConnectionState uint8
+
+// ConnectionEvent represents connection-related events that can occur.
+type ConnectionEvent uint8
+
+// Connection states
+const (
+	Disconnected       ConnectionState = iota // No active connection
+	WebSocketConnected                        // Connected via WebSocket
+	SSHConnected                              // Connected via SSH
+)
+
+// Connection events
+const (
+	WebSocketConnect    ConnectionEvent = iota // WebSocket connection established
+	WebSocketDisconnect                        // WebSocket connection lost
+	SSHConnect                                 // SSH connection established
+	SSHDisconnect                              // SSH connection lost
+)
+
+const wsTickerInterval = 10 * time.Second
+
+// newConnectionManager creates a new connection manager for the given agent.
+func newConnectionManager(agent *Agent) *ConnectionManager {
+	cm := &ConnectionManager{
+		agent: agent,
+		State: Disconnected,
+	}
+	return cm
+}
+
+// startWsTicker starts or resets the WebSocket connection attempt ticker.
+func (c *ConnectionManager) startWsTicker() {
+	if c.wsTicker == nil {
+		c.wsTicker = time.NewTicker(wsTickerInterval)
+	} else {
+		c.wsTicker.Reset(wsTickerInterval)
+	}
+}
+
+// stopWsTicker stops the WebSocket connection attempt ticker.
+func (c *ConnectionManager) stopWsTicker() {
+	if c.wsTicker != nil {
+		c.wsTicker.Stop()
+	}
+}
+
+// Start begins connection attempts and enters the main event loop.
+// It handles connection events, periodic health updates, and graceful shutdown.
+func (c *ConnectionManager) Start(serverOptions ServerOptions) error {
+	if c.eventChan != nil {
+		return errors.New("already started")
+	}
+
+	wsClient, err := newWebSocketClient(c.agent)
+	if err != nil {
+		slog.Warn("Error creating WebSocket client", "err", err)
+	}
+	c.wsClient = wsClient
+
+	c.serverOptions = serverOptions
+	c.eventChan = make(chan ConnectionEvent, 1)
+
+	// signal handling for shutdown
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+
+	c.startWsTicker()
+	c.connect()
+
+	// update health status immediately and every 90 seconds
+	_ = health.Update()
+	healthTicker := time.Tick(90 * time.Second)
+
+	for {
+		select {
+		case connectionEvent := <-c.eventChan:
+			c.handleEvent(connectionEvent)
+		case <-c.wsTicker.C:
+			_ = c.startWebSocketConnection()
+		case <-healthTicker:
+			_ = health.Update()
+		case <-sigChan:
+			slog.Info("Shutting down")
+			_ = c.agent.StopServer()
+			c.closeWebSocket()
+			return health.CleanUp()
+		}
+	}
+}
+
+// handleEvent processes connection events and updates the connection state accordingly.
+func (c *ConnectionManager) handleEvent(event ConnectionEvent) {
+	switch event {
+	case WebSocketConnect:
+		c.handleStateChange(WebSocketConnected)
+	case SSHConnect:
+		c.handleStateChange(SSHConnected)
+	case WebSocketDisconnect:
+		if c.State == WebSocketConnected {
+			c.handleStateChange(Disconnected)
+		}
+	case SSHDisconnect:
+		if c.State == SSHConnected {
+			c.handleStateChange(Disconnected)
+		}
+	}
+}
+
+// handleStateChange updates the connection state and performs necessary actions
+// based on the new state, including stopping services and initiating reconnections.
+func (c *ConnectionManager) handleStateChange(newState ConnectionState) {
+	if c.State == newState {
+		return
+	}
+	c.State = newState
+	switch newState {
+	case WebSocketConnected:
+		slog.Info("WebSocket connected", "host", c.wsClient.hubURL.Host)
+		c.ConnectionType = system.ConnectionTypeWebSocket
+		c.stopWsTicker()
+		_ = c.agent.StopServer()
+		c.isConnecting = false
+	case SSHConnected:
+		// stop new ws connection attempts
+		slog.Info("SSH connection established")
+		c.ConnectionType = system.ConnectionTypeSSH
+		c.stopWsTicker()
+		c.isConnecting = false
+	case Disconnected:
+		c.ConnectionType = system.ConnectionTypeNone
+		if c.isConnecting {
+			// Already handling reconnection, avoid duplicate attempts
+			return
+		}
+		c.isConnecting = true
+		slog.Warn("Disconnected from hub")
+		// make sure old ws connection is closed
+		c.closeWebSocket()
+		// reconnect
+		go c.connect()
+	}
+}
+
+// connect handles the connection logic with proper delays and priority.
+// It attempts WebSocket connection first, falling back to SSH server if needed.
+func (c *ConnectionManager) connect() {
+	c.isConnecting = true
+	defer func() {
+		c.isConnecting = false
+	}()
+
+	if c.wsClient != nil && time.Since(c.wsClient.lastConnectAttempt) < 5*time.Second {
+		time.Sleep(5 * time.Second)
+	}
+
+	// Try WebSocket first, if it fails, start SSH server
+	err := c.startWebSocketConnection()
+	if err != nil && c.State == Disconnected {
+		c.startSSHServer()
+		c.startWsTicker()
+	}
+}
+
+// startWebSocketConnection attempts to establish a WebSocket connection to the hub.
+func (c *ConnectionManager) startWebSocketConnection() error {
+	if c.State != Disconnected {
+		return errors.New("already connected")
+	}
+	if c.wsClient == nil {
+		return errors.New("WebSocket client not initialized")
+	}
+	if time.Since(c.wsClient.lastConnectAttempt) < 5*time.Second {
+		return errors.New("already connecting")
+	}
+
+	err := c.wsClient.Connect()
+	if err != nil {
+		slog.Warn("WebSocket connection failed", "err", err)
+		c.closeWebSocket()
+	}
+	return err
+}
+
+// startSSHServer starts the SSH server if the agent is currently disconnected.
+func (c *ConnectionManager) startSSHServer() {
+	if c.State == Disconnected {
+		go c.agent.StartServer(c.serverOptions)
+	}
+}
+
+// closeWebSocket closes the WebSocket connection if it exists.
+func (c *ConnectionManager) closeWebSocket() {
+	if c.wsClient != nil {
+		c.wsClient.Close()
+	}
+}

agent/connection_manager_test.go

@@ -0,0 +1,315 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"crypto/ed25519"
+	"fmt"
+	"net"
+	"net/url"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"golang.org/x/crypto/ssh"
+)
+
+func createTestAgent(t *testing.T) *Agent {
+	dataDir := t.TempDir()
+	agent, err := NewAgent(dataDir)
+	require.NoError(t, err)
+	return agent
+}
+
+func createTestServerOptions(t *testing.T) ServerOptions {
+	// Generate test key pair
+	_, privKey, err := ed25519.GenerateKey(nil)
+	require.NoError(t, err)
+	sshPubKey, err := ssh.NewPublicKey(privKey.Public().(ed25519.PublicKey))
+	require.NoError(t, err)
+
+	// Find available port
+	listener, err := net.Listen("tcp", "127.0.0.1:0")
+	require.NoError(t, err)
+	port := listener.Addr().(*net.TCPAddr).Port
+	listener.Close()
+
+	return ServerOptions{
+		Network: "tcp",
+		Addr:    fmt.Sprintf("127.0.0.1:%d", port),
+		Keys:    []ssh.PublicKey{sshPubKey},
+	}
+}
+
+// TestConnectionManager_NewConnectionManager tests connection manager creation
+func TestConnectionManager_NewConnectionManager(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := newConnectionManager(agent)
+
+	assert.NotNil(t, cm, "Connection manager should not be nil")
+	assert.Equal(t, agent, cm.agent, "Agent reference should be set")
+	assert.Equal(t, Disconnected, cm.State, "Initial state should be Disconnected")
+	assert.Nil(t, cm.eventChan, "Event channel should be nil initially")
+	assert.Nil(t, cm.wsClient, "WebSocket client should be nil initially")
+	assert.Nil(t, cm.wsTicker, "WebSocket ticker should be nil initially")
+	assert.False(t, cm.isConnecting, "isConnecting should be false initially")
+}
+
+// TestConnectionManager_StateTransitions tests basic state transitions
+func TestConnectionManager_StateTransitions(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+	initialState := cm.State
+	cm.wsClient = &WebSocketClient{
+		hubURL: &url.URL{
+			Host: "localhost:8080",
+		},
+	}
+	assert.NotNil(t, cm, "Connection manager should not be nil")
+	assert.Equal(t, Disconnected, initialState, "Initial state should be Disconnected")
+
+	// Test state transitions
+	cm.handleStateChange(WebSocketConnected)
+	assert.Equal(t, WebSocketConnected, cm.State, "State should change to WebSocketConnected")
+
+	cm.handleStateChange(SSHConnected)
+	assert.Equal(t, SSHConnected, cm.State, "State should change to SSHConnected")
+
+	cm.handleStateChange(Disconnected)
+	assert.Equal(t, Disconnected, cm.State, "State should change to Disconnected")
+
+	// Test that same state doesn't trigger changes
+	cm.State = WebSocketConnected
+	cm.handleStateChange(WebSocketConnected)
+	assert.Equal(t, WebSocketConnected, cm.State, "Same state should not trigger change")
+}
+
+// TestConnectionManager_EventHandling tests event handling logic
+func TestConnectionManager_EventHandling(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+	cm.wsClient = &WebSocketClient{
+		hubURL: &url.URL{
+			Host: "localhost:8080",
+		},
+	}
+
+	testCases := []struct {
+		name          string
+		initialState  ConnectionState
+		event         ConnectionEvent
+		expectedState ConnectionState
+	}{
+		{
+			name:          "WebSocket connect from disconnected",
+			initialState:  Disconnected,
+			event:         WebSocketConnect,
+			expectedState: WebSocketConnected,
+		},
+		{
+			name:          "SSH connect from disconnected",
+			initialState:  Disconnected,
+			event:         SSHConnect,
+			expectedState: SSHConnected,
+		},
+		{
+			name:          "WebSocket disconnect from connected",
+			initialState:  WebSocketConnected,
+			event:         WebSocketDisconnect,
+			expectedState: Disconnected,
+		},
+		{
+			name:          "SSH disconnect from connected",
+			initialState:  SSHConnected,
+			event:         SSHDisconnect,
+			expectedState: Disconnected,
+		},
+		{
+			name:          "WebSocket disconnect from SSH connected (no change)",
+			initialState:  SSHConnected,
+			event:         WebSocketDisconnect,
+			expectedState: SSHConnected,
+		},
+		{
+			name:          "SSH disconnect from WebSocket connected (no change)",
+			initialState:  WebSocketConnected,
+			event:         SSHDisconnect,
+			expectedState: WebSocketConnected,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			cm.State = tc.initialState
+			cm.handleEvent(tc.event)
+			assert.Equal(t, tc.expectedState, cm.State, "State should match expected after event")
+		})
+	}
+}
+
+// TestConnectionManager_TickerManagement tests WebSocket ticker management
+func TestConnectionManager_TickerManagement(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+
+	// Test starting ticker
+	cm.startWsTicker()
+	assert.NotNil(t, cm.wsTicker, "Ticker should be created")
+
+	// Test stopping ticker (should not panic)
+	assert.NotPanics(t, func() {
+		cm.stopWsTicker()
+	}, "Stopping ticker should not panic")
+
+	// Test stopping nil ticker (should not panic)
+	cm.wsTicker = nil
+	assert.NotPanics(t, func() {
+		cm.stopWsTicker()
+	}, "Stopping nil ticker should not panic")
+
+	// Test restarting ticker
+	cm.startWsTicker()
+	assert.NotNil(t, cm.wsTicker, "Ticker should be recreated")
+
+	// Test resetting existing ticker
+	firstTicker := cm.wsTicker
+	cm.startWsTicker()
+	assert.Equal(t, firstTicker, cm.wsTicker, "Same ticker instance should be reused")
+
+	cm.stopWsTicker()
+}
+
+// TestConnectionManager_WebSocketConnectionFlow tests WebSocket connection logic
+func TestConnectionManager_WebSocketConnectionFlow(t *testing.T) {
+	if testing.Short() {
+		t.Skip("Skipping WebSocket connection test in short mode")
+	}
+
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+
+	// Test WebSocket connection without proper environment
+	err := cm.startWebSocketConnection()
+	assert.Error(t, err, "WebSocket connection should fail without proper environment")
+	assert.Equal(t, Disconnected, cm.State, "State should remain Disconnected after failed connection")
+
+	// Test with invalid URL
+	os.Setenv("BESZEL_AGENT_HUB_URL", "invalid-url")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	// Test with missing token
+	os.Setenv("BESZEL_AGENT_HUB_URL", "http://localhost:8080")
+	os.Unsetenv("BESZEL_AGENT_TOKEN")
+
+	_, err2 := newWebSocketClient(agent)
+	assert.Error(t, err2, "WebSocket client creation should fail without token")
+}
+
+// TestConnectionManager_ReconnectionLogic tests reconnection prevention logic
+func TestConnectionManager_ReconnectionLogic(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+	cm.eventChan = make(chan ConnectionEvent, 1)
+
+	// Test that isConnecting flag prevents duplicate reconnection attempts
+	// Start from connected state, then simulate disconnect
+	cm.State = WebSocketConnected
+	cm.isConnecting = false
+
+	// First disconnect should trigger reconnection logic
+	cm.handleStateChange(Disconnected)
+	assert.Equal(t, Disconnected, cm.State, "Should change to disconnected")
+	assert.True(t, cm.isConnecting, "Should set isConnecting flag")
+}
+
+// TestConnectionManager_ConnectWithRateLimit tests connection rate limiting
+func TestConnectionManager_ConnectWithRateLimit(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+
+	// Set up environment for WebSocket client creation
+	os.Setenv("BESZEL_AGENT_HUB_URL", "ws://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	// Create WebSocket client
+	wsClient, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+	cm.wsClient = wsClient
+
+	// Set recent connection attempt
+	cm.wsClient.lastConnectAttempt = time.Now()
+
+	// Test that connection is rate limited
+	err = cm.startWebSocketConnection()
+	assert.Error(t, err, "Should error due to rate limiting")
+	assert.Contains(t, err.Error(), "already connecting", "Error should indicate rate limiting")
+
+	// Test connection after rate limit expires
+	cm.wsClient.lastConnectAttempt = time.Now().Add(-10 * time.Second)
+	err = cm.startWebSocketConnection()
+	// This will fail due to no actual server, but should not be rate limited
+	assert.Error(t, err, "Connection should fail but not due to rate limiting")
+	assert.NotContains(t, err.Error(), "already connecting", "Error should not indicate rate limiting")
+}
+
+// TestConnectionManager_StartWithInvalidConfig tests starting with invalid configuration
+func TestConnectionManager_StartWithInvalidConfig(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+	serverOptions := createTestServerOptions(t)
+
+	// Test starting when already started
+	cm.eventChan = make(chan ConnectionEvent, 5)
+	err := cm.Start(serverOptions)
+	assert.Error(t, err, "Should error when starting already started connection manager")
+}
+
+// TestConnectionManager_CloseWebSocket tests WebSocket closing
+func TestConnectionManager_CloseWebSocket(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+
+	// Test closing when no WebSocket client exists
+	assert.NotPanics(t, func() {
+		cm.closeWebSocket()
+	}, "Should not panic when closing nil WebSocket client")
+
+	// Set up environment and create WebSocket client
+	os.Setenv("BESZEL_AGENT_HUB_URL", "ws://localhost:8080")
+	os.Setenv("BESZEL_AGENT_TOKEN", "test-token")
+	defer func() {
+		os.Unsetenv("BESZEL_AGENT_HUB_URL")
+		os.Unsetenv("BESZEL_AGENT_TOKEN")
+	}()
+
+	wsClient, err := newWebSocketClient(agent)
+	require.NoError(t, err)
+	cm.wsClient = wsClient
+
+	// Test closing when WebSocket client exists
+	assert.NotPanics(t, func() {
+		cm.closeWebSocket()
+	}, "Should not panic when closing WebSocket client")
+}
+
+// TestConnectionManager_ConnectFlow tests the connect method
+func TestConnectionManager_ConnectFlow(t *testing.T) {
+	agent := createTestAgent(t)
+	cm := agent.connectionManager
+
+	// Test connect without WebSocket client
+	assert.NotPanics(t, func() {
+		cm.connect()
+	}, "Connect should not panic without WebSocket client")
+}

agent/cpu.go

@@ -0,0 +1,66 @@
+package agent
+
+import (
+	"math"
+	"runtime"
+
+	"github.com/shirou/gopsutil/v4/cpu"
+)
+
+var lastCpuTimes = make(map[uint16]cpu.TimesStat)
+
+// init initializes the CPU monitoring by storing the initial CPU times
+// for the default 60-second cache interval.
+func init() {
+	if times, err := cpu.Times(false); err == nil {
+		lastCpuTimes[60000] = times[0]
+	}
+}
+
+// getCpuPercent calculates the CPU usage percentage using cached previous measurements.
+// It uses the specified cache time interval to determine the time window for calculation.
+// Returns the CPU usage percentage (0-100) and any error encountered.
+func getCpuPercent(cacheTimeMs uint16) (float64, error) {
+	times, err := cpu.Times(false)
+	if err != nil || len(times) == 0 {
+		return 0, err
+	}
+	// if cacheTimeMs is not in lastCpuTimes, use 60000 as fallback lastCpuTime
+	if _, ok := lastCpuTimes[cacheTimeMs]; !ok {
+		lastCpuTimes[cacheTimeMs] = lastCpuTimes[60000]
+	}
+	delta := calculateBusy(lastCpuTimes[cacheTimeMs], times[0])
+	lastCpuTimes[cacheTimeMs] = times[0]
+	return delta, nil
+}
+
+// calculateBusy calculates the CPU busy percentage between two time points.
+// It computes the ratio of busy time to total time elapsed between t1 and t2,
+// returning a percentage clamped between 0 and 100.
+func calculateBusy(t1, t2 cpu.TimesStat) float64 {
+	t1All, t1Busy := getAllBusy(t1)
+	t2All, t2Busy := getAllBusy(t2)
+
+	if t2Busy <= t1Busy {
+		return 0
+	}
+	if t2All <= t1All {
+		return 100
+	}
+	return math.Min(100, math.Max(0, (t2Busy-t1Busy)/(t2All-t1All)*100))
+}
+
+// getAllBusy calculates the total CPU time and busy CPU time from CPU times statistics.
+// On Linux, it excludes guest and guest_nice time from the total to match kernel behavior.
+// Returns total CPU time and busy CPU time (total minus idle and I/O wait time).
+func getAllBusy(t cpu.TimesStat) (float64, float64) {
+	tot := t.Total()
+	if runtime.GOOS == "linux" {
+		tot -= t.Guest     // Linux 2.6.24+
+		tot -= t.GuestNice // Linux 3.2.0+
+	}
+
+	busy := tot - t.Idle - t.Iowait
+
+	return tot, busy
+}

agent/data_dir.go

@@ -0,0 +1,117 @@
+package agent
+
+import (
+	"errors"
+	"fmt"
+	"os"
+	"path/filepath"
+	"runtime"
+)
+
+// getDataDir returns the path to the data directory for the agent and an error
+// if the directory is not valid. Attempts to find the optimal data directory if
+// no data directories are provided.
+func getDataDir(dataDirs ...string) (string, error) {
+	if len(dataDirs) > 0 {
+		return testDataDirs(dataDirs)
+	}
+
+	dataDir, _ := GetEnv("DATA_DIR")
+	if dataDir != "" {
+		dataDirs = append(dataDirs, dataDir)
+	}
+
+	if runtime.GOOS == "windows" {
+		dataDirs = append(dataDirs,
+			filepath.Join(os.Getenv("APPDATA"), "beszel-agent"),
+			filepath.Join(os.Getenv("LOCALAPPDATA"), "beszel-agent"),
+		)
+	} else {
+		dataDirs = append(dataDirs, "/var/lib/beszel-agent")
+		if homeDir, err := os.UserHomeDir(); err == nil {
+			dataDirs = append(dataDirs, filepath.Join(homeDir, ".config", "beszel"))
+		}
+	}
+	return testDataDirs(dataDirs)
+}
+
+func testDataDirs(paths []string) (string, error) {
+	// first check if the directory exists and is writable
+	for _, path := range paths {
+		if valid, _ := isValidDataDir(path, false); valid {
+			return path, nil
+		}
+	}
+	// if the directory doesn't exist, try to create it
+	for _, path := range paths {
+		exists, _ := directoryExists(path)
+		if exists {
+			continue
+		}
+
+		if err := os.MkdirAll(path, 0755); err != nil {
+			continue
+		}
+
+		// Verify the created directory is actually writable
+		writable, _ := directoryIsWritable(path)
+		if !writable {
+			continue
+		}
+
+		return path, nil
+	}
+
+	return "", errors.New("data directory not found")
+}
+
+func isValidDataDir(path string, createIfNotExists bool) (bool, error) {
+	exists, err := directoryExists(path)
+	if err != nil {
+		return false, err
+	}
+
+	if !exists {
+		if !createIfNotExists {
+			return false, nil
+		}
+		if err = os.MkdirAll(path, 0755); err != nil {
+			return false, err
+		}
+	}
+
+	// Always check if the directory is writable
+	writable, err := directoryIsWritable(path)
+	if err != nil {
+		return false, err
+	}
+	return writable, nil
+}
+
+// directoryExists checks if a directory exists
+func directoryExists(path string) (bool, error) {
+	// Check if directory exists
+	stat, err := os.Stat(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return false, nil
+		}
+		return false, err
+	}
+	if !stat.IsDir() {
+		return false, fmt.Errorf("%s is not a directory", path)
+	}
+	return true, nil
+}
+
+// directoryIsWritable tests if a directory is writable by creating and removing a temporary file
+func directoryIsWritable(path string) (bool, error) {
+	testFile := filepath.Join(path, ".write-test")
+	file, err := os.Create(testFile)
+	if err != nil {
+		return false, err
+	}
+	defer file.Close()
+	defer os.Remove(testFile)
+	return true, nil
+}

agent/data_dir_test.go

@@ -0,0 +1,263 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestGetDataDir(t *testing.T) {
+	// Test with explicit dataDir parameter
+	t.Run("explicit data dir", func(t *testing.T) {
+		tempDir := t.TempDir()
+		result, err := getDataDir(tempDir)
+		require.NoError(t, err)
+		assert.Equal(t, tempDir, result)
+	})
+
+	// Test with explicit non-existent dataDir that can be created
+	t.Run("explicit data dir - create new", func(t *testing.T) {
+		tempDir := t.TempDir()
+		newDir := filepath.Join(tempDir, "new-data-dir")
+		result, err := getDataDir(newDir)
+		require.NoError(t, err)
+		assert.Equal(t, newDir, result)
+
+		// Verify directory was created
+		stat, err := os.Stat(newDir)
+		require.NoError(t, err)
+		assert.True(t, stat.IsDir())
+	})
+
+	// Test with DATA_DIR environment variable
+	t.Run("DATA_DIR environment variable", func(t *testing.T) {
+		tempDir := t.TempDir()
+
+		// Set environment variable
+		oldValue := os.Getenv("DATA_DIR")
+		defer func() {
+			if oldValue == "" {
+				os.Unsetenv("BESZEL_AGENT_DATA_DIR")
+			} else {
+				os.Setenv("BESZEL_AGENT_DATA_DIR", oldValue)
+			}
+		}()
+
+		os.Setenv("BESZEL_AGENT_DATA_DIR", tempDir)
+
+		result, err := getDataDir()
+		require.NoError(t, err)
+		assert.Equal(t, tempDir, result)
+	})
+
+	// Test with invalid explicit dataDir
+	t.Run("invalid explicit data dir", func(t *testing.T) {
+		invalidPath := "/invalid/path/that/cannot/be/created"
+		_, err := getDataDir(invalidPath)
+		assert.Error(t, err)
+	})
+
+	// Test fallback behavior (empty dataDir, no env var)
+	t.Run("fallback to default directories", func(t *testing.T) {
+		// Clear DATA_DIR environment variable
+		oldValue := os.Getenv("DATA_DIR")
+		defer func() {
+			if oldValue == "" {
+				os.Unsetenv("DATA_DIR")
+			} else {
+				os.Setenv("DATA_DIR", oldValue)
+			}
+		}()
+		os.Unsetenv("DATA_DIR")
+
+		// This will try platform-specific defaults, which may or may not work
+		// We're mainly testing that it doesn't panic and returns some result
+		result, err := getDataDir()
+		// We don't assert success/failure here since it depends on system permissions
+		// Just verify we get a string result if no error
+		if err == nil {
+			assert.NotEmpty(t, result)
+		}
+	})
+}
+
+func TestTestDataDirs(t *testing.T) {
+	// Test with existing valid directory
+	t.Run("existing valid directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		result, err := testDataDirs([]string{tempDir})
+		require.NoError(t, err)
+		assert.Equal(t, tempDir, result)
+	})
+
+	// Test with multiple directories, first one valid
+	t.Run("multiple dirs - first valid", func(t *testing.T) {
+		tempDir := t.TempDir()
+		invalidDir := "/invalid/path"
+		result, err := testDataDirs([]string{tempDir, invalidDir})
+		require.NoError(t, err)
+		assert.Equal(t, tempDir, result)
+	})
+
+	// Test with multiple directories, second one valid
+	t.Run("multiple dirs - second valid", func(t *testing.T) {
+		tempDir := t.TempDir()
+		invalidDir := "/invalid/path"
+		result, err := testDataDirs([]string{invalidDir, tempDir})
+		require.NoError(t, err)
+		assert.Equal(t, tempDir, result)
+	})
+
+	// Test with non-existing directory that can be created
+	t.Run("create new directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		newDir := filepath.Join(tempDir, "new-dir")
+		result, err := testDataDirs([]string{newDir})
+		require.NoError(t, err)
+		assert.Equal(t, newDir, result)
+
+		// Verify directory was created
+		stat, err := os.Stat(newDir)
+		require.NoError(t, err)
+		assert.True(t, stat.IsDir())
+	})
+
+	// Test with no valid directories
+	t.Run("no valid directories", func(t *testing.T) {
+		invalidPaths := []string{"/invalid/path1", "/invalid/path2"}
+		_, err := testDataDirs(invalidPaths)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "data directory not found")
+	})
+}
+
+func TestIsValidDataDir(t *testing.T) {
+	// Test with existing directory
+	t.Run("existing directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		valid, err := isValidDataDir(tempDir, false)
+		require.NoError(t, err)
+		assert.True(t, valid)
+	})
+
+	// Test with non-existing directory, createIfNotExists=false
+	t.Run("non-existing dir - no create", func(t *testing.T) {
+		tempDir := t.TempDir()
+		nonExistentDir := filepath.Join(tempDir, "does-not-exist")
+		valid, err := isValidDataDir(nonExistentDir, false)
+		require.NoError(t, err)
+		assert.False(t, valid)
+	})
+
+	// Test with non-existing directory, createIfNotExists=true
+	t.Run("non-existing dir - create", func(t *testing.T) {
+		tempDir := t.TempDir()
+		newDir := filepath.Join(tempDir, "new-dir")
+		valid, err := isValidDataDir(newDir, true)
+		require.NoError(t, err)
+		assert.True(t, valid)
+
+		// Verify directory was created
+		stat, err := os.Stat(newDir)
+		require.NoError(t, err)
+		assert.True(t, stat.IsDir())
+	})
+
+	// Test with file instead of directory
+	t.Run("file instead of directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		tempFile := filepath.Join(tempDir, "testfile")
+		err := os.WriteFile(tempFile, []byte("test"), 0644)
+		require.NoError(t, err)
+
+		valid, err := isValidDataDir(tempFile, false)
+		assert.Error(t, err)
+		assert.False(t, valid)
+		assert.Contains(t, err.Error(), "is not a directory")
+	})
+}
+
+func TestDirectoryExists(t *testing.T) {
+	// Test with existing directory
+	t.Run("existing directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		exists, err := directoryExists(tempDir)
+		require.NoError(t, err)
+		assert.True(t, exists)
+	})
+
+	// Test with non-existing directory
+	t.Run("non-existing directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		nonExistentDir := filepath.Join(tempDir, "does-not-exist")
+		exists, err := directoryExists(nonExistentDir)
+		require.NoError(t, err)
+		assert.False(t, exists)
+	})
+
+	// Test with file instead of directory
+	t.Run("file instead of directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		tempFile := filepath.Join(tempDir, "testfile")
+		err := os.WriteFile(tempFile, []byte("test"), 0644)
+		require.NoError(t, err)
+
+		exists, err := directoryExists(tempFile)
+		assert.Error(t, err)
+		assert.False(t, exists)
+		assert.Contains(t, err.Error(), "is not a directory")
+	})
+}
+
+func TestDirectoryIsWritable(t *testing.T) {
+	// Test with writable directory
+	t.Run("writable directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		writable, err := directoryIsWritable(tempDir)
+		require.NoError(t, err)
+		assert.True(t, writable)
+	})
+
+	// Test with non-existing directory
+	t.Run("non-existing directory", func(t *testing.T) {
+		tempDir := t.TempDir()
+		nonExistentDir := filepath.Join(tempDir, "does-not-exist")
+		writable, err := directoryIsWritable(nonExistentDir)
+		assert.Error(t, err)
+		assert.False(t, writable)
+	})
+
+	// Test with non-writable directory (Unix-like systems only)
+	t.Run("non-writable directory", func(t *testing.T) {
+		if runtime.GOOS != "linux" && runtime.GOOS != "darwin" {
+			t.Skip("Skipping non-writable directory test on", runtime.GOOS)
+		}
+
+		tempDir := t.TempDir()
+		readOnlyDir := filepath.Join(tempDir, "readonly")
+
+		// Create the directory
+		err := os.Mkdir(readOnlyDir, 0755)
+		require.NoError(t, err)
+
+		// Make it read-only
+		err = os.Chmod(readOnlyDir, 0444)
+		require.NoError(t, err)
+
+		// Restore permissions after test for cleanup
+		defer func() {
+			os.Chmod(readOnlyDir, 0755)
+		}()
+
+		writable, err := directoryIsWritable(readOnlyDir)
+		assert.Error(t, err)
+		assert.False(t, writable)
+	})
+}

agent/deltatracker/deltatracker.go

@@ -0,0 +1,100 @@
+// Package deltatracker provides a tracker for calculating differences in numeric values over time.
+package deltatracker
+
+import (
+	"sync"
+
+	"golang.org/x/exp/constraints"
+)
+
+// Numeric is a constraint that permits any integer or floating-point type.
+type Numeric interface {
+	constraints.Integer | constraints.Float
+}
+
+// DeltaTracker is a generic, thread-safe tracker for calculating differences
+// in numeric values over time.
+// K is the key type (e.g., int, string).
+// V is the value type (e.g., int, int64, float32, float64).
+type DeltaTracker[K comparable, V Numeric] struct {
+	sync.RWMutex
+	current  map[K]V
+	previous map[K]V
+}
+
+// NewDeltaTracker creates a new generic tracker.
+func NewDeltaTracker[K comparable, V Numeric]() *DeltaTracker[K, V] {
+	return &DeltaTracker[K, V]{
+		current:  make(map[K]V),
+		previous: make(map[K]V),
+	}
+}
+
+// Set records the current value for a given ID.
+func (t *DeltaTracker[K, V]) Set(id K, value V) {
+	t.Lock()
+	defer t.Unlock()
+	t.current[id] = value
+}
+
+// Snapshot returns a copy of the current map.
+// func (t *DeltaTracker[K, V]) Snapshot() map[K]V {
+// 	t.RLock()
+// 	defer t.RUnlock()
+
+// 	copyMap := make(map[K]V, len(t.current))
+// 	maps.Copy(copyMap, t.current)
+// 	return copyMap
+// }
+
+// Deltas returns a map of all calculated deltas for the current interval.
+func (t *DeltaTracker[K, V]) Deltas() map[K]V {
+	t.RLock()
+	defer t.RUnlock()
+
+	deltas := make(map[K]V)
+	for id, currentVal := range t.current {
+		if previousVal, ok := t.previous[id]; ok {
+			deltas[id] = currentVal - previousVal
+		} else {
+			deltas[id] = 0
+		}
+	}
+	return deltas
+}
+
+// Previous returns the previously recorded value for the given key, if it exists.
+func (t *DeltaTracker[K, V]) Previous(id K) (V, bool) {
+	t.RLock()
+	defer t.RUnlock()
+
+	value, ok := t.previous[id]
+	return value, ok
+}
+
+// Delta returns the delta for a single key.
+// Returns 0 if the key doesn't exist or has no previous value.
+func (t *DeltaTracker[K, V]) Delta(id K) V {
+	t.RLock()
+	defer t.RUnlock()
+
+	currentVal, currentOk := t.current[id]
+	if !currentOk {
+		return 0
+	}
+
+	previousVal, previousOk := t.previous[id]
+	if !previousOk {
+		return 0
+	}
+
+	return currentVal - previousVal
+}
+
+// Cycle prepares the tracker for the next interval.
+func (t *DeltaTracker[K, V]) Cycle() {
+	t.Lock()
+	defer t.Unlock()
+	t.previous = t.current
+	t.current = make(map[K]V)
+}

agent/deltatracker/deltatracker_test.go

@@ -0,0 +1,217 @@
+package deltatracker
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func ExampleDeltaTracker() {
+	tracker := NewDeltaTracker[string, int]()
+	tracker.Set("key1", 10)
+	tracker.Set("key2", 20)
+	tracker.Cycle()
+	tracker.Set("key1", 15)
+	tracker.Set("key2", 30)
+	fmt.Println(tracker.Delta("key1"))
+	fmt.Println(tracker.Delta("key2"))
+	fmt.Println(tracker.Deltas())
+	// Output: 5
+	// 10
+	// map[key1:5 key2:10]
+}
+
+func TestNewDeltaTracker(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+	assert.NotNil(t, tracker)
+	assert.Empty(t, tracker.current)
+	assert.Empty(t, tracker.previous)
+}
+
+func TestSet(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+	tracker.Set("key1", 10)
+
+	tracker.RLock()
+	defer tracker.RUnlock()
+
+	assert.Equal(t, 10, tracker.current["key1"])
+}
+
+func TestDeltas(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+
+	// Test with no previous values
+	tracker.Set("key1", 10)
+	tracker.Set("key2", 20)
+
+	deltas := tracker.Deltas()
+	assert.Equal(t, 0, deltas["key1"])
+	assert.Equal(t, 0, deltas["key2"])
+
+	// Cycle to move current to previous
+	tracker.Cycle()
+
+	// Set new values and check deltas
+	tracker.Set("key1", 15) // Delta should be 5 (15-10)
+	tracker.Set("key2", 25) // Delta should be 5 (25-20)
+	tracker.Set("key3", 30) // New key, delta should be 0
+
+	deltas = tracker.Deltas()
+	assert.Equal(t, 5, deltas["key1"])
+	assert.Equal(t, 5, deltas["key2"])
+	assert.Equal(t, 0, deltas["key3"])
+}
+
+func TestCycle(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+
+	tracker.Set("key1", 10)
+	tracker.Set("key2", 20)
+
+	// Verify current has values
+	tracker.RLock()
+	assert.Equal(t, 10, tracker.current["key1"])
+	assert.Equal(t, 20, tracker.current["key2"])
+	assert.Empty(t, tracker.previous)
+	tracker.RUnlock()
+
+	tracker.Cycle()
+
+	// After cycle, previous should have the old current values
+	// and current should be empty
+	tracker.RLock()
+	assert.Empty(t, tracker.current)
+	assert.Equal(t, 10, tracker.previous["key1"])
+	assert.Equal(t, 20, tracker.previous["key2"])
+	tracker.RUnlock()
+}
+
+func TestCompleteWorkflow(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+
+	// First interval
+	tracker.Set("server1", 100)
+	tracker.Set("server2", 200)
+
+	// Get deltas for first interval (should be zero)
+	firstDeltas := tracker.Deltas()
+	assert.Equal(t, 0, firstDeltas["server1"])
+	assert.Equal(t, 0, firstDeltas["server2"])
+
+	// Cycle to next interval
+	tracker.Cycle()
+
+	// Second interval
+	tracker.Set("server1", 150) // Delta: 50
+	tracker.Set("server2", 180) // Delta: -20
+	tracker.Set("server3", 300) // New server, delta: 300
+
+	secondDeltas := tracker.Deltas()
+	assert.Equal(t, 50, secondDeltas["server1"])
+	assert.Equal(t, -20, secondDeltas["server2"])
+	assert.Equal(t, 0, secondDeltas["server3"])
+}
+
+func TestDeltaTrackerWithDifferentTypes(t *testing.T) {
+	// Test with int64
+	intTracker := NewDeltaTracker[string, int64]()
+	intTracker.Set("pid1", 1000)
+	intTracker.Cycle()
+	intTracker.Set("pid1", 1200)
+	intDeltas := intTracker.Deltas()
+	assert.Equal(t, int64(200), intDeltas["pid1"])
+
+	// Test with float64
+	floatTracker := NewDeltaTracker[string, float64]()
+	floatTracker.Set("cpu1", 1.5)
+	floatTracker.Cycle()
+	floatTracker.Set("cpu1", 2.7)
+	floatDeltas := floatTracker.Deltas()
+	assert.InDelta(t, 1.2, floatDeltas["cpu1"], 0.0001)
+
+	// Test with int keys
+	pidTracker := NewDeltaTracker[int, int64]()
+	pidTracker.Set(101, 20000)
+	pidTracker.Cycle()
+	pidTracker.Set(101, 22500)
+	pidDeltas := pidTracker.Deltas()
+	assert.Equal(t, int64(2500), pidDeltas[101])
+}
+
+func TestDelta(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+
+	// Test getting delta for non-existent key
+	result := tracker.Delta("nonexistent")
+	assert.Equal(t, 0, result)
+
+	// Test getting delta for key with no previous value
+	tracker.Set("key1", 10)
+	result = tracker.Delta("key1")
+	assert.Equal(t, 0, result)
+
+	// Cycle to move current to previous
+	tracker.Cycle()
+
+	// Test getting delta for key with previous value
+	tracker.Set("key1", 15)
+	result = tracker.Delta("key1")
+	assert.Equal(t, 5, result)
+
+	// Test getting delta for key that exists in previous but not current
+	result = tracker.Delta("key1")
+	assert.Equal(t, 5, result) // Should still return 5
+
+	// Test getting delta for key that exists in current but not previous
+	tracker.Set("key2", 20)
+	result = tracker.Delta("key2")
+	assert.Equal(t, 0, result)
+}
+
+func TestDeltaWithDifferentTypes(t *testing.T) {
+	// Test with int64
+	intTracker := NewDeltaTracker[string, int64]()
+	intTracker.Set("pid1", 1000)
+	intTracker.Cycle()
+	intTracker.Set("pid1", 1200)
+	result := intTracker.Delta("pid1")
+	assert.Equal(t, int64(200), result)
+
+	// Test with float64
+	floatTracker := NewDeltaTracker[string, float64]()
+	floatTracker.Set("cpu1", 1.5)
+	floatTracker.Cycle()
+	floatTracker.Set("cpu1", 2.7)
+	floatResult := floatTracker.Delta("cpu1")
+	assert.InDelta(t, 1.2, floatResult, 0.0001)
+
+	// Test with int keys
+	pidTracker := NewDeltaTracker[int, int64]()
+	pidTracker.Set(101, 20000)
+	pidTracker.Cycle()
+	pidTracker.Set(101, 22500)
+	pidResult := pidTracker.Delta(101)
+	assert.Equal(t, int64(2500), pidResult)
+}
+
+func TestDeltaConcurrentAccess(t *testing.T) {
+	tracker := NewDeltaTracker[string, int]()
+
+	// Set initial values
+	tracker.Set("key1", 10)
+	tracker.Set("key2", 20)
+	tracker.Cycle()
+
+	// Set new values
+	tracker.Set("key1", 15)
+	tracker.Set("key2", 25)
+
+	// Test concurrent access safety
+	result1 := tracker.Delta("key1")
+	result2 := tracker.Delta("key2")
+
+	assert.Equal(t, 5, result1)
+	assert.Equal(t, 5, result2)
+}

agent/disk.go

@@ -0,0 +1,306 @@
+package agent
+
+import (
+	"log/slog"
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/shirou/gopsutil/v4/disk"
+)
+
+// parseFilesystemEntry parses a filesystem entry in the format "device__customname"
+// Returns the device/filesystem part and the custom name part
+func parseFilesystemEntry(entry string) (device, customName string) {
+	entry = strings.TrimSpace(entry)
+	if parts := strings.SplitN(entry, "__", 2); len(parts) == 2 {
+		device = strings.TrimSpace(parts[0])
+		customName = strings.TrimSpace(parts[1])
+	} else {
+		device = entry
+	}
+	return device, customName
+}
+
+// Sets up the filesystems to monitor for disk usage and I/O.
+func (a *Agent) initializeDiskInfo() {
+	filesystem, _ := GetEnv("FILESYSTEM")
+	efPath := "/extra-filesystems"
+	hasRoot := false
+
+	partitions, err := disk.Partitions(false)
+	if err != nil {
+		slog.Error("Error getting disk partitions", "err", err)
+	}
+	slog.Debug("Disk", "partitions", partitions)
+
+	// ioContext := context.WithValue(a.sensorsContext,
+	// 	common.EnvKey, common.EnvMap{common.HostProcEnvKey: "/tmp/testproc"},
+	// )
+	// diskIoCounters, err := disk.IOCountersWithContext(ioContext)
+
+	diskIoCounters, err := disk.IOCounters()
+	if err != nil {
+		slog.Error("Error getting diskstats", "err", err)
+	}
+	slog.Debug("Disk I/O", "diskstats", diskIoCounters)
+
+	// Helper function to add a filesystem to fsStats if it doesn't exist
+	addFsStat := func(device, mountpoint string, root bool, customName ...string) {
+		var key string
+		if runtime.GOOS == "windows" {
+			key = device
+		} else {
+			key = filepath.Base(device)
+		}
+		var ioMatch bool
+		if _, exists := a.fsStats[key]; !exists {
+			if root {
+				slog.Info("Detected root device", "name", key)
+				// Check if root device is in /proc/diskstats, use fallback if not
+				if _, ioMatch = diskIoCounters[key]; !ioMatch {
+					key, ioMatch = findIoDevice(filesystem, diskIoCounters, a.fsStats)
+					if !ioMatch {
+						slog.Info("Using I/O fallback", "device", device, "mountpoint", mountpoint, "fallback", key)
+					}
+				}
+			} else {
+				// Check if non-root has diskstats and fall back to folder name if not
+				// Scenario: device is encrypted and named luks-2bcb02be-999d-4417-8d18-5c61e660fb6e - not in /proc/diskstats.
+				// However, the device can be specified by mounting folder from luks device at /extra-filesystems/sda1
+				if _, ioMatch = diskIoCounters[key]; !ioMatch {
+					efBase := filepath.Base(mountpoint)
+					if _, ioMatch = diskIoCounters[efBase]; ioMatch {
+						key = efBase
+					}
+				}
+			}
+			fsStats := &system.FsStats{Root: root, Mountpoint: mountpoint}
+			if len(customName) > 0 && customName[0] != "" {
+				fsStats.Name = customName[0]
+			}
+			a.fsStats[key] = fsStats
+		}
+	}
+
+	// Use FILESYSTEM env var to find root filesystem
+	if filesystem != "" {
+		for _, p := range partitions {
+			if strings.HasSuffix(p.Device, filesystem) || p.Mountpoint == filesystem {
+				addFsStat(p.Device, p.Mountpoint, true)
+				hasRoot = true
+				break
+			}
+		}
+		if !hasRoot {
+			slog.Warn("Partition details not found", "filesystem", filesystem)
+		}
+	}
+
+	// Add EXTRA_FILESYSTEMS env var values to fsStats
+	if extraFilesystems, exists := GetEnv("EXTRA_FILESYSTEMS"); exists {
+		for _, fsEntry := range strings.Split(extraFilesystems, ",") {
+			// Parse custom name from format: device__customname
+			fs, customName := parseFilesystemEntry(fsEntry)
+
+			found := false
+			for _, p := range partitions {
+				if strings.HasSuffix(p.Device, fs) || p.Mountpoint == fs {
+					addFsStat(p.Device, p.Mountpoint, false, customName)
+					found = true
+					break
+				}
+			}
+			// if not in partitions, test if we can get disk usage
+			if !found {
+				if _, err := disk.Usage(fs); err == nil {
+					addFsStat(filepath.Base(fs), fs, false, customName)
+				} else {
+					slog.Error("Invalid filesystem", "name", fs, "err", err)
+				}
+			}
+		}
+	}
+
+	// Process partitions for various mount points
+	for _, p := range partitions {
+		// fmt.Println(p.Device, p.Mountpoint)
+		// Binary root fallback or docker root fallback
+		if !hasRoot && (p.Mountpoint == "/" || (p.Mountpoint == "/etc/hosts" && strings.HasPrefix(p.Device, "/dev"))) {
+			fs, match := findIoDevice(filepath.Base(p.Device), diskIoCounters, a.fsStats)
+			if match {
+				addFsStat(fs, p.Mountpoint, true)
+				hasRoot = true
+			}
+		}
+
+		// Check if device is in /extra-filesystems
+		if strings.HasPrefix(p.Mountpoint, efPath) {
+			device, customName := parseFilesystemEntry(p.Mountpoint)
+			addFsStat(device, p.Mountpoint, false, customName)
+		}
+	}
+
+	// Check all folders in /extra-filesystems and add them if not already present
+	if folders, err := os.ReadDir(efPath); err == nil {
+		existingMountpoints := make(map[string]bool)
+		for _, stats := range a.fsStats {
+			existingMountpoints[stats.Mountpoint] = true
+		}
+		for _, folder := range folders {
+			if folder.IsDir() {
+				mountpoint := filepath.Join(efPath, folder.Name())
+				slog.Debug("/extra-filesystems", "mountpoint", mountpoint)
+				if !existingMountpoints[mountpoint] {
+					device, customName := parseFilesystemEntry(folder.Name())
+					addFsStat(device, mountpoint, false, customName)
+				}
+			}
+		}
+	}
+
+	// If no root filesystem set, use fallback
+	if !hasRoot {
+		rootDevice, _ := findIoDevice(filepath.Base(filesystem), diskIoCounters, a.fsStats)
+		slog.Info("Root disk", "mountpoint", "/", "io", rootDevice)
+		a.fsStats[rootDevice] = &system.FsStats{Root: true, Mountpoint: "/"}
+	}
+
+	a.initializeDiskIoStats(diskIoCounters)
+}
+
+// Returns matching device from /proc/diskstats,
+// or the device with the most reads if no match is found.
+// bool is true if a match was found.
+func findIoDevice(filesystem string, diskIoCounters map[string]disk.IOCountersStat, fsStats map[string]*system.FsStats) (string, bool) {
+	var maxReadBytes uint64
+	maxReadDevice := "/"
+	for _, d := range diskIoCounters {
+		if d.Name == filesystem || (d.Label != "" && d.Label == filesystem) {
+			return d.Name, true
+		}
+		if d.ReadBytes > maxReadBytes {
+			// don't use if device already exists in fsStats
+			if _, exists := fsStats[d.Name]; !exists {
+				maxReadBytes = d.ReadBytes
+				maxReadDevice = d.Name
+			}
+		}
+	}
+	return maxReadDevice, false
+}
+
+// Sets start values for disk I/O stats.
+func (a *Agent) initializeDiskIoStats(diskIoCounters map[string]disk.IOCountersStat) {
+	for device, stats := range a.fsStats {
+		// skip if not in diskIoCounters
+		d, exists := diskIoCounters[device]
+		if !exists {
+			slog.Warn("Device not found in diskstats", "name", device)
+			continue
+		}
+		// populate initial values
+		stats.Time = time.Now()
+		stats.TotalRead = d.ReadBytes
+		stats.TotalWrite = d.WriteBytes
+		// add to list of valid io device names
+		a.fsNames = append(a.fsNames, device)
+	}
+}
+
+// Updates disk usage statistics for all monitored filesystems
+func (a *Agent) updateDiskUsage(systemStats *system.Stats) {
+	// disk usage
+	for _, stats := range a.fsStats {
+		if d, err := disk.Usage(stats.Mountpoint); err == nil {
+			stats.DiskTotal = bytesToGigabytes(d.Total)
+			stats.DiskUsed = bytesToGigabytes(d.Used)
+			if stats.Root {
+				systemStats.DiskTotal = bytesToGigabytes(d.Total)
+				systemStats.DiskUsed = bytesToGigabytes(d.Used)
+				systemStats.DiskPct = twoDecimals(d.UsedPercent)
+			}
+		} else {
+			// reset stats if error (likely unmounted)
+			slog.Error("Error getting disk stats", "name", stats.Mountpoint, "err", err)
+			stats.DiskTotal = 0
+			stats.DiskUsed = 0
+			stats.TotalRead = 0
+			stats.TotalWrite = 0
+		}
+	}
+}
+
+// Updates disk I/O statistics for all monitored filesystems
+func (a *Agent) updateDiskIo(cacheTimeMs uint16, systemStats *system.Stats) {
+	// disk i/o (cache-aware per interval)
+	if ioCounters, err := disk.IOCounters(a.fsNames...); err == nil {
+		// Ensure map for this interval exists
+		if _, ok := a.diskPrev[cacheTimeMs]; !ok {
+			a.diskPrev[cacheTimeMs] = make(map[string]prevDisk)
+		}
+		now := time.Now()
+		for name, d := range ioCounters {
+			stats := a.fsStats[d.Name]
+			if stats == nil {
+				// skip devices not tracked
+				continue
+			}
+
+			// Previous snapshot for this interval and device
+			prev, hasPrev := a.diskPrev[cacheTimeMs][name]
+			if !hasPrev {
+				// Seed from agent-level fsStats if present, else seed from current
+				prev = prevDisk{readBytes: stats.TotalRead, writeBytes: stats.TotalWrite, at: stats.Time}
+				if prev.at.IsZero() {
+					prev = prevDisk{readBytes: d.ReadBytes, writeBytes: d.WriteBytes, at: now}
+				}
+			}
+
+			msElapsed := uint64(now.Sub(prev.at).Milliseconds())
+			if msElapsed < 100 {
+				// Avoid division by zero or clock issues; update snapshot and continue
+				a.diskPrev[cacheTimeMs][name] = prevDisk{readBytes: d.ReadBytes, writeBytes: d.WriteBytes, at: now}
+				continue
+			}
+
+			diskIORead := (d.ReadBytes - prev.readBytes) * 1000 / msElapsed
+			diskIOWrite := (d.WriteBytes - prev.writeBytes) * 1000 / msElapsed
+			readMbPerSecond := bytesToMegabytes(float64(diskIORead))
+			writeMbPerSecond := bytesToMegabytes(float64(diskIOWrite))
+
+			// validate values
+			if readMbPerSecond > 50_000 || writeMbPerSecond > 50_000 {
+				slog.Warn("Invalid disk I/O. Resetting.", "name", d.Name, "read", readMbPerSecond, "write", writeMbPerSecond)
+				// Reset interval snapshot and seed from current
+				a.diskPrev[cacheTimeMs][name] = prevDisk{readBytes: d.ReadBytes, writeBytes: d.WriteBytes, at: now}
+				// also refresh agent baseline to avoid future negatives
+				a.initializeDiskIoStats(ioCounters)
+				continue
+			}
+
+			// Update per-interval snapshot
+			a.diskPrev[cacheTimeMs][name] = prevDisk{readBytes: d.ReadBytes, writeBytes: d.WriteBytes, at: now}
+
+			// Update global fsStats baseline for cross-interval correctness
+			stats.Time = now
+			stats.TotalRead = d.ReadBytes
+			stats.TotalWrite = d.WriteBytes
+			stats.DiskReadPs = readMbPerSecond
+			stats.DiskWritePs = writeMbPerSecond
+			stats.DiskReadBytes = diskIORead
+			stats.DiskWriteBytes = diskIOWrite
+
+			if stats.Root {
+				systemStats.DiskReadPs = stats.DiskReadPs
+				systemStats.DiskWritePs = stats.DiskWritePs
+				systemStats.DiskIO[0] = diskIORead
+				systemStats.DiskIO[1] = diskIOWrite
+			}
+		}
+	}
+}

agent/disk_test.go

@@ -0,0 +1,235 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"os"
+	"strings"
+	"testing"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+	"github.com/shirou/gopsutil/v4/disk"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParseFilesystemEntry(t *testing.T) {
+	tests := []struct {
+		name         string
+		input        string
+		expectedFs   string
+		expectedName string
+	}{
+		{
+			name:         "simple device name",
+			input:        "sda1",
+			expectedFs:   "sda1",
+			expectedName: "",
+		},
+		{
+			name:         "device with custom name",
+			input:        "sda1__my-storage",
+			expectedFs:   "sda1",
+			expectedName: "my-storage",
+		},
+		{
+			name:         "full device path with custom name",
+			input:        "/dev/sdb1__backup-drive",
+			expectedFs:   "/dev/sdb1",
+			expectedName: "backup-drive",
+		},
+		{
+			name:         "NVMe device with custom name",
+			input:        "nvme0n1p2__fast-ssd",
+			expectedFs:   "nvme0n1p2",
+			expectedName: "fast-ssd",
+		},
+		{
+			name:         "whitespace trimmed",
+			input:        "  sda2__trimmed-name  ",
+			expectedFs:   "sda2",
+			expectedName: "trimmed-name",
+		},
+		{
+			name:         "empty custom name",
+			input:        "sda3__",
+			expectedFs:   "sda3",
+			expectedName: "",
+		},
+		{
+			name:         "empty device name",
+			input:        "__just-custom",
+			expectedFs:   "",
+			expectedName: "just-custom",
+		},
+		{
+			name:         "multiple underscores in custom name",
+			input:        "sda1__my_custom_drive",
+			expectedFs:   "sda1",
+			expectedName: "my_custom_drive",
+		},
+		{
+			name:         "custom name with spaces",
+			input:        "sda1__My Storage Drive",
+			expectedFs:   "sda1",
+			expectedName: "My Storage Drive",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			fsEntry := strings.TrimSpace(tt.input)
+			var fs, customName string
+			if parts := strings.SplitN(fsEntry, "__", 2); len(parts) == 2 {
+				fs = strings.TrimSpace(parts[0])
+				customName = strings.TrimSpace(parts[1])
+			} else {
+				fs = fsEntry
+			}
+
+			assert.Equal(t, tt.expectedFs, fs)
+			assert.Equal(t, tt.expectedName, customName)
+		})
+	}
+}
+
+func TestInitializeDiskInfoWithCustomNames(t *testing.T) {
+	// Set up environment variables
+	oldEnv := os.Getenv("EXTRA_FILESYSTEMS")
+	defer func() {
+		if oldEnv != "" {
+			os.Setenv("EXTRA_FILESYSTEMS", oldEnv)
+		} else {
+			os.Unsetenv("EXTRA_FILESYSTEMS")
+		}
+	}()
+
+	// Test with custom names
+	os.Setenv("EXTRA_FILESYSTEMS", "sda1__my-storage,/dev/sdb1__backup-drive,nvme0n1p2")
+
+	// Mock disk partitions (we'll just test the parsing logic)
+	// Since the actual disk operations are system-dependent, we'll focus on the parsing
+	testCases := []struct {
+		envValue      string
+		expectedFs    []string
+		expectedNames map[string]string
+	}{
+		{
+			envValue:   "sda1__my-storage,sdb1__backup-drive",
+			expectedFs: []string{"sda1", "sdb1"},
+			expectedNames: map[string]string{
+				"sda1": "my-storage",
+				"sdb1": "backup-drive",
+			},
+		},
+		{
+			envValue:   "sda1,nvme0n1p2__fast-ssd",
+			expectedFs: []string{"sda1", "nvme0n1p2"},
+			expectedNames: map[string]string{
+				"nvme0n1p2": "fast-ssd",
+			},
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run("env_"+tc.envValue, func(t *testing.T) {
+			os.Setenv("EXTRA_FILESYSTEMS", tc.envValue)
+
+			// Create mock partitions that would match our test cases
+			partitions := []disk.PartitionStat{}
+			for _, fs := range tc.expectedFs {
+				if strings.HasPrefix(fs, "/dev/") {
+					partitions = append(partitions, disk.PartitionStat{
+						Device:     fs,
+						Mountpoint: fs,
+					})
+				} else {
+					partitions = append(partitions, disk.PartitionStat{
+						Device:     "/dev/" + fs,
+						Mountpoint: "/" + fs,
+					})
+				}
+			}
+
+			// Test the parsing logic by calling the relevant part
+			// We'll create a simplified version to test just the parsing
+			extraFilesystems := tc.envValue
+			for _, fsEntry := range strings.Split(extraFilesystems, ",") {
+				// Parse the entry
+				fsEntry = strings.TrimSpace(fsEntry)
+				var fs, customName string
+				if parts := strings.SplitN(fsEntry, "__", 2); len(parts) == 2 {
+					fs = strings.TrimSpace(parts[0])
+					customName = strings.TrimSpace(parts[1])
+				} else {
+					fs = fsEntry
+				}
+
+				// Verify the device is in our expected list
+				assert.Contains(t, tc.expectedFs, fs, "parsed device should be in expected list")
+
+				// Check if custom name should exist
+				if expectedName, exists := tc.expectedNames[fs]; exists {
+					assert.Equal(t, expectedName, customName, "custom name should match expected")
+				} else {
+					assert.Empty(t, customName, "custom name should be empty when not expected")
+				}
+			}
+		})
+	}
+}
+
+func TestFsStatsWithCustomNames(t *testing.T) {
+	// Test that FsStats properly stores custom names
+	fsStats := &system.FsStats{
+		Mountpoint: "/mnt/storage",
+		Name:       "my-custom-storage",
+		DiskTotal:  100.0,
+		DiskUsed:   50.0,
+	}
+
+	assert.Equal(t, "my-custom-storage", fsStats.Name)
+	assert.Equal(t, "/mnt/storage", fsStats.Mountpoint)
+	assert.Equal(t, 100.0, fsStats.DiskTotal)
+	assert.Equal(t, 50.0, fsStats.DiskUsed)
+}
+
+func TestExtraFsKeyGeneration(t *testing.T) {
+	// Test the logic for generating ExtraFs keys with custom names
+	testCases := []struct {
+		name        string
+		deviceName  string
+		customName  string
+		expectedKey string
+	}{
+		{
+			name:        "with custom name",
+			deviceName:  "sda1",
+			customName:  "my-storage",
+			expectedKey: "my-storage",
+		},
+		{
+			name:        "without custom name",
+			deviceName:  "sda1",
+			customName:  "",
+			expectedKey: "sda1",
+		},
+		{
+			name:        "empty custom name falls back to device",
+			deviceName:  "nvme0n1p2",
+			customName:  "",
+			expectedKey: "nvme0n1p2",
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Simulate the key generation logic from agent.go
+			key := tc.deviceName
+			if tc.customName != "" {
+				key = tc.customName
+			}
+			assert.Equal(t, tc.expectedKey, key)
+		})
+	}
+}

agent/docker-compose.yml

@@ -1,12 +0,0 @@
-services:
-  beszel-agent:
-    image: 'henrygd/beszel-agent'
-    container_name: 'beszel-agent'
-    restart: unless-stopped
-    network_mode: host
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock:ro
-    environment:
-      PORT: 45876
-      KEY: 'ssh-ed25519 YOUR_PUBLIC_KEY'
-      # FILESYSTEM: /dev/sda1 # set to the correct filesystem for disk I/O stats

agent/docker.go

@@ -0,0 +1,721 @@
+package agent
+
+import (
+	"bytes"
+	"context"
+	"encoding/binary"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/henrygd/beszel/agent/deltatracker"
+	"github.com/henrygd/beszel/internal/entities/container"
+
+	"github.com/blang/semver"
+)
+
+const (
+	// Docker API timeout in milliseconds
+	dockerTimeoutMs = 2100
+	// Maximum realistic network speed (5 GB/s) to detect bad deltas
+	maxNetworkSpeedBps uint64 = 5e9
+	// Maximum conceivable memory usage of a container (100TB) to detect bad memory stats
+	maxMemoryUsage uint64 = 100 * 1024 * 1024 * 1024 * 1024
+	// Number of log lines to request when fetching container logs
+	dockerLogsTail = 200
+	// Maximum size of a single log frame (1MB) to prevent memory exhaustion
+	// A single log line larger than 1MB is likely an error or misconfiguration
+	maxLogFrameSize = 1024 * 1024
+	// Maximum total log content size (5MB) to prevent memory exhaustion
+	// This provides a reasonable limit for network transfer and browser rendering
+	maxTotalLogSize = 5 * 1024 * 1024
+)
+
+type dockerManager struct {
+	client              *http.Client                // Client to query Docker API
+	wg                  sync.WaitGroup              // WaitGroup to wait for all goroutines to finish
+	sem                 chan struct{}               // Semaphore to limit concurrent container requests
+	containerStatsMutex sync.RWMutex                // Mutex to prevent concurrent access to containerStatsMap
+	apiContainerList    []*container.ApiInfo        // List of containers from Docker API
+	containerStatsMap   map[string]*container.Stats // Keeps track of container stats
+	validIds            map[string]struct{}         // Map of valid container ids, used to prune invalid containers from containerStatsMap
+	goodDockerVersion   bool                        // Whether docker version is at least 25.0.0 (one-shot works correctly)
+	isWindows           bool                        // Whether the Docker Engine API is running on Windows
+	buf                 *bytes.Buffer               // Buffer to store and read response bodies
+	decoder             *json.Decoder               // Reusable JSON decoder that reads from buf
+	apiStats            *container.ApiStats         // Reusable API stats object
+
+	// Cache-time-aware tracking for CPU stats (similar to cpu.go)
+	// Maps cache time intervals to container-specific CPU usage tracking
+	lastCpuContainer map[uint16]map[string]uint64    // cacheTimeMs -> containerId -> last cpu container usage
+	lastCpuSystem    map[uint16]map[string]uint64    // cacheTimeMs -> containerId -> last cpu system usage
+	lastCpuReadTime  map[uint16]map[string]time.Time // cacheTimeMs -> containerId -> last read time (Windows)
+
+	// Network delta trackers - one per cache time to avoid interference
+	// cacheTimeMs -> DeltaTracker for network bytes sent/received
+	networkSentTrackers map[uint16]*deltatracker.DeltaTracker[string, uint64]
+	networkRecvTrackers map[uint16]*deltatracker.DeltaTracker[string, uint64]
+}
+
+// userAgentRoundTripper is a custom http.RoundTripper that adds a User-Agent header to all requests
+type userAgentRoundTripper struct {
+	rt        http.RoundTripper
+	userAgent string
+}
+
+// RoundTrip implements the http.RoundTripper interface
+func (u *userAgentRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	req.Header.Set("User-Agent", u.userAgent)
+	return u.rt.RoundTrip(req)
+}
+
+// Add goroutine to the queue
+func (d *dockerManager) queue() {
+	d.wg.Add(1)
+	if d.goodDockerVersion {
+		d.sem <- struct{}{}
+	}
+}
+
+// Remove goroutine from the queue
+func (d *dockerManager) dequeue() {
+	d.wg.Done()
+	if d.goodDockerVersion {
+		<-d.sem
+	}
+}
+
+// Returns stats for all running containers with cache-time-aware delta tracking
+func (dm *dockerManager) getDockerStats(cacheTimeMs uint16) ([]*container.Stats, error) {
+	resp, err := dm.client.Get("http://localhost/containers/json")
+	if err != nil {
+		return nil, err
+	}
+
+	dm.apiContainerList = dm.apiContainerList[:0]
+	if err := dm.decode(resp, &dm.apiContainerList); err != nil {
+		return nil, err
+	}
+
+	dm.isWindows = strings.Contains(resp.Header.Get("Server"), "windows")
+
+	containersLength := len(dm.apiContainerList)
+
+	// store valid ids to clean up old container ids from map
+	if dm.validIds == nil {
+		dm.validIds = make(map[string]struct{}, containersLength)
+	} else {
+		clear(dm.validIds)
+	}
+
+	var failedContainers []*container.ApiInfo
+
+	for _, ctr := range dm.apiContainerList {
+		ctr.IdShort = ctr.Id[:12]
+		dm.validIds[ctr.IdShort] = struct{}{}
+		// check if container is less than 1 minute old (possible restart)
+		// note: can't use Created field because it's not updated on restart
+		if strings.Contains(ctr.Status, "second") {
+			// if so, remove old container data
+			dm.deleteContainerStatsSync(ctr.IdShort)
+		}
+		dm.queue()
+		go func(ctr *container.ApiInfo) {
+			defer dm.dequeue()
+			err := dm.updateContainerStats(ctr, cacheTimeMs)
+			// if error, delete from map and add to failed list to retry
+			if err != nil {
+				dm.containerStatsMutex.Lock()
+				delete(dm.containerStatsMap, ctr.IdShort)
+				failedContainers = append(failedContainers, ctr)
+				dm.containerStatsMutex.Unlock()
+			}
+		}(ctr)
+	}
+
+	dm.wg.Wait()
+
+	// retry failed containers separately so we can run them in parallel (docker 24 bug)
+	if len(failedContainers) > 0 {
+		slog.Debug("Retrying failed containers", "count", len(failedContainers))
+		for i := range failedContainers {
+			ctr := failedContainers[i]
+			dm.queue()
+			go func(ctr *container.ApiInfo) {
+				defer dm.dequeue()
+				if err2 := dm.updateContainerStats(ctr, cacheTimeMs); err2 != nil {
+					slog.Error("Error getting container stats", "err", err2)
+				}
+			}(ctr)
+		}
+		dm.wg.Wait()
+	}
+
+	// populate final stats and remove old / invalid container stats
+	stats := make([]*container.Stats, 0, containersLength)
+	for id, v := range dm.containerStatsMap {
+		if _, exists := dm.validIds[id]; !exists {
+			delete(dm.containerStatsMap, id)
+		} else {
+			stats = append(stats, v)
+		}
+	}
+
+	// prepare network trackers for next interval for this cache time
+	dm.cycleNetworkDeltasForCacheTime(cacheTimeMs)
+
+	return stats, nil
+}
+
+// initializeCpuTracking initializes CPU tracking maps for a specific cache time interval
+func (dm *dockerManager) initializeCpuTracking(cacheTimeMs uint16) {
+	// Initialize cache time maps if they don't exist
+	if dm.lastCpuContainer[cacheTimeMs] == nil {
+		dm.lastCpuContainer[cacheTimeMs] = make(map[string]uint64)
+	}
+	if dm.lastCpuSystem[cacheTimeMs] == nil {
+		dm.lastCpuSystem[cacheTimeMs] = make(map[string]uint64)
+	}
+	// Ensure the outer map exists before indexing
+	if dm.lastCpuReadTime == nil {
+		dm.lastCpuReadTime = make(map[uint16]map[string]time.Time)
+	}
+	if dm.lastCpuReadTime[cacheTimeMs] == nil {
+		dm.lastCpuReadTime[cacheTimeMs] = make(map[string]time.Time)
+	}
+}
+
+// getCpuPreviousValues returns previous CPU values for a container and cache time interval
+func (dm *dockerManager) getCpuPreviousValues(cacheTimeMs uint16, containerId string) (uint64, uint64) {
+	return dm.lastCpuContainer[cacheTimeMs][containerId], dm.lastCpuSystem[cacheTimeMs][containerId]
+}
+
+// setCpuCurrentValues stores current CPU values for a container and cache time interval
+func (dm *dockerManager) setCpuCurrentValues(cacheTimeMs uint16, containerId string, cpuContainer, cpuSystem uint64) {
+	dm.lastCpuContainer[cacheTimeMs][containerId] = cpuContainer
+	dm.lastCpuSystem[cacheTimeMs][containerId] = cpuSystem
+}
+
+// calculateMemoryUsage calculates memory usage from Docker API stats
+func calculateMemoryUsage(apiStats *container.ApiStats, isWindows bool) (uint64, error) {
+	if isWindows {
+		return apiStats.MemoryStats.PrivateWorkingSet, nil
+	}
+
+	memCache := apiStats.MemoryStats.Stats.InactiveFile
+	if memCache == 0 {
+		memCache = apiStats.MemoryStats.Stats.Cache
+	}
+
+	usedDelta := apiStats.MemoryStats.Usage - memCache
+	if usedDelta <= 0 || usedDelta > maxMemoryUsage {
+		return 0, fmt.Errorf("bad memory stats")
+	}
+
+	return usedDelta, nil
+}
+
+// getNetworkTracker returns the DeltaTracker for a specific cache time, creating it if needed
+func (dm *dockerManager) getNetworkTracker(cacheTimeMs uint16, isSent bool) *deltatracker.DeltaTracker[string, uint64] {
+	var trackers map[uint16]*deltatracker.DeltaTracker[string, uint64]
+	if isSent {
+		trackers = dm.networkSentTrackers
+	} else {
+		trackers = dm.networkRecvTrackers
+	}
+
+	if trackers[cacheTimeMs] == nil {
+		trackers[cacheTimeMs] = deltatracker.NewDeltaTracker[string, uint64]()
+	}
+
+	return trackers[cacheTimeMs]
+}
+
+// cycleNetworkDeltasForCacheTime cycles the network delta trackers for a specific cache time
+func (dm *dockerManager) cycleNetworkDeltasForCacheTime(cacheTimeMs uint16) {
+	if dm.networkSentTrackers[cacheTimeMs] != nil {
+		dm.networkSentTrackers[cacheTimeMs].Cycle()
+	}
+	if dm.networkRecvTrackers[cacheTimeMs] != nil {
+		dm.networkRecvTrackers[cacheTimeMs].Cycle()
+	}
+}
+
+// calculateNetworkStats calculates network sent/receive deltas using DeltaTracker
+func (dm *dockerManager) calculateNetworkStats(ctr *container.ApiInfo, apiStats *container.ApiStats, stats *container.Stats, initialized bool, name string, cacheTimeMs uint16) (uint64, uint64) {
+	var total_sent, total_recv uint64
+	for _, v := range apiStats.Networks {
+		total_sent += v.TxBytes
+		total_recv += v.RxBytes
+	}
+
+	// Get the DeltaTracker for this specific cache time
+	sentTracker := dm.getNetworkTracker(cacheTimeMs, true)
+	recvTracker := dm.getNetworkTracker(cacheTimeMs, false)
+
+	// Set current values in the cache-time-specific DeltaTracker
+	sentTracker.Set(ctr.IdShort, total_sent)
+	recvTracker.Set(ctr.IdShort, total_recv)
+
+	// Get deltas (bytes since last measurement)
+	sent_delta_raw := sentTracker.Delta(ctr.IdShort)
+	recv_delta_raw := recvTracker.Delta(ctr.IdShort)
+
+	// Calculate bytes per second independently for Tx and Rx if we have previous data
+	var sent_delta, recv_delta uint64
+	if initialized {
+		millisecondsElapsed := uint64(time.Since(stats.PrevReadTime).Milliseconds())
+		if millisecondsElapsed > 0 {
+			if sent_delta_raw > 0 {
+				sent_delta = sent_delta_raw * 1000 / millisecondsElapsed
+				if sent_delta > maxNetworkSpeedBps {
+					slog.Warn("Bad network delta", "container", name)
+					sent_delta = 0
+				}
+			}
+			if recv_delta_raw > 0 {
+				recv_delta = recv_delta_raw * 1000 / millisecondsElapsed
+				if recv_delta > maxNetworkSpeedBps {
+					slog.Warn("Bad network delta", "container", name)
+					recv_delta = 0
+				}
+			}
+		}
+	}
+
+	return sent_delta, recv_delta
+}
+
+// validateCpuPercentage checks if CPU percentage is within valid range
+func validateCpuPercentage(cpuPct float64, containerName string) error {
+	if cpuPct > 100 {
+		return fmt.Errorf("%s cpu pct greater than 100: %+v", containerName, cpuPct)
+	}
+	return nil
+}
+
+// updateContainerStatsValues updates the final stats values
+func updateContainerStatsValues(stats *container.Stats, cpuPct float64, usedMemory uint64, sent_delta, recv_delta uint64, readTime time.Time) {
+	stats.Cpu = twoDecimals(cpuPct)
+	stats.Mem = bytesToMegabytes(float64(usedMemory))
+	stats.NetworkSent = bytesToMegabytes(float64(sent_delta))
+	stats.NetworkRecv = bytesToMegabytes(float64(recv_delta))
+	stats.PrevReadTime = readTime
+}
+
+func parseDockerStatus(status string) (string, container.DockerHealth) {
+	trimmed := strings.TrimSpace(status)
+	if trimmed == "" {
+		return "", container.DockerHealthNone
+	}
+
+	// Remove "About " from status
+	trimmed = strings.Replace(trimmed, "About ", "", 1)
+
+	openIdx := strings.LastIndex(trimmed, "(")
+	if openIdx == -1 || !strings.HasSuffix(trimmed, ")") {
+		return trimmed, container.DockerHealthNone
+	}
+
+	statusText := strings.TrimSpace(trimmed[:openIdx])
+	if statusText == "" {
+		statusText = trimmed
+	}
+
+	healthText := strings.ToLower(strings.TrimSpace(strings.TrimSuffix(trimmed[openIdx+1:], ")")))
+	// Some Docker statuses include a "health:" prefix inside the parentheses.
+	// Strip it so it maps correctly to the known health states.
+	if colonIdx := strings.IndexRune(healthText, ':'); colonIdx != -1 {
+		prefix := strings.TrimSpace(healthText[:colonIdx])
+		if prefix == "health" || prefix == "health status" {
+			healthText = strings.TrimSpace(healthText[colonIdx+1:])
+		}
+	}
+	if health, ok := container.DockerHealthStrings[healthText]; ok {
+		return statusText, health
+	}
+
+	return trimmed, container.DockerHealthNone
+}
+
+// Updates stats for individual container with cache-time-aware delta tracking
+func (dm *dockerManager) updateContainerStats(ctr *container.ApiInfo, cacheTimeMs uint16) error {
+	name := ctr.Names[0][1:]
+
+	resp, err := dm.client.Get(fmt.Sprintf("http://localhost/containers/%s/stats?stream=0&one-shot=1", ctr.IdShort))
+	if err != nil {
+		return err
+	}
+
+	dm.containerStatsMutex.Lock()
+	defer dm.containerStatsMutex.Unlock()
+
+	// add empty values if they doesn't exist in map
+	stats, initialized := dm.containerStatsMap[ctr.IdShort]
+	if !initialized {
+		stats = &container.Stats{Name: name, Id: ctr.IdShort, Image: ctr.Image}
+		dm.containerStatsMap[ctr.IdShort] = stats
+	}
+
+	stats.Id = ctr.IdShort
+
+	statusText, health := parseDockerStatus(ctr.Status)
+	stats.Status = statusText
+	stats.Health = health
+
+	// reset current stats
+	stats.Cpu = 0
+	stats.Mem = 0
+	stats.NetworkSent = 0
+	stats.NetworkRecv = 0
+
+	res := dm.apiStats
+	res.Networks = nil
+	if err := dm.decode(resp, res); err != nil {
+		return err
+	}
+
+	// Initialize CPU tracking for this cache time interval
+	dm.initializeCpuTracking(cacheTimeMs)
+
+	// Get previous CPU values
+	prevCpuContainer, prevCpuSystem := dm.getCpuPreviousValues(cacheTimeMs, ctr.IdShort)
+
+	// Calculate CPU percentage based on platform
+	var cpuPct float64
+	if dm.isWindows {
+		prevRead := dm.lastCpuReadTime[cacheTimeMs][ctr.IdShort]
+		cpuPct = res.CalculateCpuPercentWindows(prevCpuContainer, prevRead)
+	} else {
+		cpuPct = res.CalculateCpuPercentLinux(prevCpuContainer, prevCpuSystem)
+	}
+
+	// Calculate memory usage
+	usedMemory, err := calculateMemoryUsage(res, dm.isWindows)
+	if err != nil {
+		return fmt.Errorf("%s - %w - see https://github.com/henrygd/beszel/issues/144", name, err)
+	}
+
+	// Store current CPU stats for next calculation
+	currentCpuContainer := res.CPUStats.CPUUsage.TotalUsage
+	currentCpuSystem := res.CPUStats.SystemUsage
+	dm.setCpuCurrentValues(cacheTimeMs, ctr.IdShort, currentCpuContainer, currentCpuSystem)
+
+	// Validate CPU percentage
+	if err := validateCpuPercentage(cpuPct, name); err != nil {
+		return err
+	}
+
+	// Calculate network stats using DeltaTracker
+	sent_delta, recv_delta := dm.calculateNetworkStats(ctr, res, stats, initialized, name, cacheTimeMs)
+
+	// Store current network values for legacy compatibility
+	var total_sent, total_recv uint64
+	for _, v := range res.Networks {
+		total_sent += v.TxBytes
+		total_recv += v.RxBytes
+	}
+	stats.PrevNet.Sent, stats.PrevNet.Recv = total_sent, total_recv
+
+	// Update final stats values
+	updateContainerStatsValues(stats, cpuPct, usedMemory, sent_delta, recv_delta, res.Read)
+	// store per-cache-time read time for Windows CPU percent calc
+	dm.lastCpuReadTime[cacheTimeMs][ctr.IdShort] = res.Read
+
+	return nil
+}
+
+// Delete container stats from map using mutex
+func (dm *dockerManager) deleteContainerStatsSync(id string) {
+	dm.containerStatsMutex.Lock()
+	defer dm.containerStatsMutex.Unlock()
+	delete(dm.containerStatsMap, id)
+	for ct := range dm.lastCpuContainer {
+		delete(dm.lastCpuContainer[ct], id)
+	}
+	for ct := range dm.lastCpuSystem {
+		delete(dm.lastCpuSystem[ct], id)
+	}
+	for ct := range dm.lastCpuReadTime {
+		delete(dm.lastCpuReadTime[ct], id)
+	}
+}
+
+// Creates a new http client for Docker or Podman API
+func newDockerManager(a *Agent) *dockerManager {
+	dockerHost, exists := GetEnv("DOCKER_HOST")
+	if exists {
+		// return nil if set to empty string
+		if dockerHost == "" {
+			return nil
+		}
+	} else {
+		dockerHost = getDockerHost()
+	}
+
+	parsedURL, err := url.Parse(dockerHost)
+	if err != nil {
+		os.Exit(1)
+	}
+
+	transport := &http.Transport{
+		DisableCompression: true,
+		MaxConnsPerHost:    0,
+	}
+
+	switch parsedURL.Scheme {
+	case "unix":
+		transport.DialContext = func(ctx context.Context, proto, addr string) (net.Conn, error) {
+			return (&net.Dialer{}).DialContext(ctx, "unix", parsedURL.Path)
+		}
+	case "tcp", "http", "https":
+		transport.DialContext = func(ctx context.Context, proto, addr string) (net.Conn, error) {
+			return (&net.Dialer{}).DialContext(ctx, "tcp", parsedURL.Host)
+		}
+	default:
+		slog.Error("Invalid DOCKER_HOST", "scheme", parsedURL.Scheme)
+		os.Exit(1)
+	}
+
+	// configurable timeout
+	timeout := time.Millisecond * time.Duration(dockerTimeoutMs)
+	if t, set := GetEnv("DOCKER_TIMEOUT"); set {
+		timeout, err = time.ParseDuration(t)
+		if err != nil {
+			slog.Error(err.Error())
+			os.Exit(1)
+		}
+		slog.Info("DOCKER_TIMEOUT", "timeout", timeout)
+	}
+
+	// Custom user-agent to avoid docker bug: https://github.com/docker/for-mac/issues/7575
+	userAgentTransport := &userAgentRoundTripper{
+		rt:        transport,
+		userAgent: "Docker-Client/",
+	}
+
+	manager := &dockerManager{
+		client: &http.Client{
+			Timeout:   timeout,
+			Transport: userAgentTransport,
+		},
+		containerStatsMap: make(map[string]*container.Stats),
+		sem:               make(chan struct{}, 5),
+		apiContainerList:  []*container.ApiInfo{},
+		apiStats:          &container.ApiStats{},
+
+		// Initialize cache-time-aware tracking structures
+		lastCpuContainer:    make(map[uint16]map[string]uint64),
+		lastCpuSystem:       make(map[uint16]map[string]uint64),
+		lastCpuReadTime:     make(map[uint16]map[string]time.Time),
+		networkSentTrackers: make(map[uint16]*deltatracker.DeltaTracker[string, uint64]),
+		networkRecvTrackers: make(map[uint16]*deltatracker.DeltaTracker[string, uint64]),
+	}
+
+	// If using podman, return client
+	if strings.Contains(dockerHost, "podman") {
+		a.systemInfo.Podman = true
+		manager.goodDockerVersion = true
+		return manager
+	}
+
+	// this can take up to 5 seconds with retry, so run in goroutine
+	go manager.checkDockerVersion()
+
+	// give version check a chance to complete before returning
+	time.Sleep(50 * time.Millisecond)
+
+	return manager
+}
+
+// checkDockerVersion checks Docker version and sets goodDockerVersion if at least 25.0.0.
+// Versions before 25.0.0 have a bug with one-shot which requires all requests to be made in one batch.
+func (dm *dockerManager) checkDockerVersion() {
+	var err error
+	var resp *http.Response
+	var versionInfo struct {
+		Version string `json:"Version"`
+	}
+	const versionMaxTries = 2
+	for i := 1; i <= versionMaxTries; i++ {
+		resp, err = dm.client.Get("http://localhost/version")
+		if err == nil {
+			break
+		}
+		if resp != nil {
+			resp.Body.Close()
+		}
+		if i < versionMaxTries {
+			slog.Debug("Failed to get Docker version; retrying", "attempt", i, "error", err)
+			time.Sleep(5 * time.Second)
+		}
+	}
+	if err != nil {
+		return
+	}
+	if err := dm.decode(resp, &versionInfo); err != nil {
+		return
+	}
+	// if version > 24, one-shot works correctly and we can limit concurrent operations
+	if dockerVersion, err := semver.Parse(versionInfo.Version); err == nil && dockerVersion.Major > 24 {
+		dm.goodDockerVersion = true
+	} else {
+		slog.Info(fmt.Sprintf("Docker %s is outdated. Upgrade if possible. See https://github.com/henrygd/beszel/issues/58", versionInfo.Version))
+	}
+}
+
+// Decodes Docker API JSON response using a reusable buffer and decoder. Not thread safe.
+func (dm *dockerManager) decode(resp *http.Response, d any) error {
+	if dm.buf == nil {
+		// initialize buffer with 256kb starting size
+		dm.buf = bytes.NewBuffer(make([]byte, 0, 1024*256))
+		dm.decoder = json.NewDecoder(dm.buf)
+	}
+	defer resp.Body.Close()
+	defer dm.buf.Reset()
+	_, err := dm.buf.ReadFrom(resp.Body)
+	if err != nil {
+		return err
+	}
+	return dm.decoder.Decode(d)
+}
+
+// Test docker / podman sockets and return if one exists
+func getDockerHost() string {
+	scheme := "unix://"
+	socks := []string{"/var/run/docker.sock", fmt.Sprintf("/run/user/%v/podman/podman.sock", os.Getuid())}
+	for _, sock := range socks {
+		if _, err := os.Stat(sock); err == nil {
+			return scheme + sock
+		}
+	}
+	return scheme + socks[0]
+}
+
+// getContainerInfo fetches the inspection data for a container
+func (dm *dockerManager) getContainerInfo(ctx context.Context, containerID string) ([]byte, error) {
+	endpoint := fmt.Sprintf("http://localhost/containers/%s/json", containerID)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	resp, err := dm.client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(io.LimitReader(resp.Body, 1024))
+		return nil, fmt.Errorf("container info request failed: %s: %s", resp.Status, strings.TrimSpace(string(body)))
+	}
+
+	// Remove sensitive environment variables from Config.Env
+	var containerInfo map[string]any
+	if err := json.NewDecoder(resp.Body).Decode(&containerInfo); err != nil {
+		return nil, err
+	}
+	if config, ok := containerInfo["Config"].(map[string]any); ok {
+		delete(config, "Env")
+	}
+
+	return json.Marshal(containerInfo)
+}
+
+// getLogs fetches the logs for a container
+func (dm *dockerManager) getLogs(ctx context.Context, containerID string) (string, error) {
+	endpoint := fmt.Sprintf("http://localhost/containers/%s/logs?stdout=1&stderr=1&tail=%d", containerID, dockerLogsTail)
+	req, err := http.NewRequestWithContext(ctx, http.MethodGet, endpoint, nil)
+	if err != nil {
+		return "", err
+	}
+
+	resp, err := dm.client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		body, _ := io.ReadAll(io.LimitReader(resp.Body, 1024))
+		return "", fmt.Errorf("logs request failed: %s: %s", resp.Status, strings.TrimSpace(string(body)))
+	}
+
+	var builder strings.Builder
+	if err := decodeDockerLogStream(resp.Body, &builder); err != nil {
+		return "", err
+	}
+
+	return builder.String(), nil
+}
+
+func decodeDockerLogStream(reader io.Reader, builder *strings.Builder) error {
+	const headerSize = 8
+	var header [headerSize]byte
+	buf := make([]byte, 0, dockerLogsTail*200)
+	totalBytesRead := 0
+
+	for {
+		if _, err := io.ReadFull(reader, header[:]); err != nil {
+			if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) {
+				return nil
+			}
+			return err
+		}
+
+		frameLen := binary.BigEndian.Uint32(header[4:])
+		if frameLen == 0 {
+			continue
+		}
+
+		// Prevent memory exhaustion from excessively large frames
+		if frameLen > maxLogFrameSize {
+			return fmt.Errorf("log frame size (%d) exceeds maximum (%d)", frameLen, maxLogFrameSize)
+		}
+
+		// Check if reading this frame would exceed total log size limit
+		if totalBytesRead+int(frameLen) > maxTotalLogSize {
+			// Read and discard remaining data to avoid blocking
+			_, _ = io.Copy(io.Discard, io.LimitReader(reader, int64(frameLen)))
+			slog.Debug("Truncating logs: limit reached", "read", totalBytesRead, "limit", maxTotalLogSize)
+			return nil
+		}
+
+		buf = allocateBuffer(buf, int(frameLen))
+		if _, err := io.ReadFull(reader, buf[:frameLen]); err != nil {
+			if errors.Is(err, io.EOF) || errors.Is(err, io.ErrUnexpectedEOF) {
+				if len(buf) > 0 {
+					builder.Write(buf[:min(int(frameLen), len(buf))])
+				}
+				return nil
+			}
+			return err
+		}
+		builder.Write(buf[:frameLen])
+		totalBytesRead += int(frameLen)
+	}
+}
+
+func allocateBuffer(current []byte, needed int) []byte {
+	if cap(current) >= needed {
+		return current[:needed]
+	}
+	return make([]byte, needed)
+}
+
+func min(a, b int) int {
+	if a < b {
+		return a
+	}
+	return b
+}

agent/dockerfile

@@ -1,20 +0,0 @@
-FROM --platform=$BUILDPLATFORM golang:alpine as builder
-
-WORKDIR /app
-
-# Download Go modules
-COPY go.mod go.sum ./
-RUN go mod download
-
-COPY *.go ./
-
-# Build
-ARG TARGETOS TARGETARCH
-RUN CGO_ENABLED=0 GOOS=$TARGETOS GOARCH=$TARGETARCH go build -ldflags "-w -s" -o /agent .
-
-# ? -------------------------
-FROM scratch
-
-COPY --from=builder /agent /agent
-
-ENTRYPOINT ["/agent"]

agent/go.mod

@@ -1,32 +0,0 @@
-module beszel-agent
-
-go 1.22.4
-
-require (
-	github.com/blang/semver v3.5.1+incompatible
-	github.com/gliderlabs/ssh v0.3.7
-	github.com/rhysd/go-github-selfupdate v1.2.3
-	github.com/shirou/gopsutil/v4 v4.24.6
-)
-
-require (
-	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
-	github.com/go-ole/go-ole v1.3.0 // indirect
-	github.com/golang/protobuf v1.3.2 // indirect
-	github.com/google/go-github/v30 v30.1.0 // indirect
-	github.com/google/go-querystring v1.0.0 // indirect
-	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf // indirect
-	github.com/lufia/plan9stats v0.0.0-20240513124658-fba389f38bae // indirect
-	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
-	github.com/shoenig/go-m1cpu v0.1.6 // indirect
-	github.com/tcnksm/go-gitconfig v0.1.2 // indirect
-	github.com/tklauser/go-sysconf v0.3.14 // indirect
-	github.com/tklauser/numcpus v0.8.0 // indirect
-	github.com/ulikunitz/xz v0.5.9 // indirect
-	github.com/yusufpapurcu/wmi v1.2.4 // indirect
-	golang.org/x/crypto v0.25.0 // indirect
-	golang.org/x/net v0.21.0 // indirect
-	golang.org/x/oauth2 v0.0.0-20181106182150-f42d05182288 // indirect
-	golang.org/x/sys v0.22.0 // indirect
-	google.golang.org/appengine v1.3.0 // indirect
-)

agent/go.sum

@@ -1,97 +0,0 @@
-github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
-github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
-github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
-github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
-github.com/gliderlabs/ssh v0.3.7 h1:iV3Bqi942d9huXnzEF2Mt+CY9gLu8DNM4Obd+8bODRE=
-github.com/gliderlabs/ssh v0.3.7/go.mod h1:zpHEXBstFnQYtGnB8k8kQLol82umzn/2/snG7alWVD8=
-github.com/go-ole/go-ole v1.2.6/go.mod h1:pprOEPIfldk/42T2oK7lQ4v4JSDwmV0As9GaiUsvbm0=
-github.com/go-ole/go-ole v1.3.0 h1:Dt6ye7+vXGIKZ7Xtk4s6/xVdGDQynvom7xCFEdWr6uE=
-github.com/go-ole/go-ole v1.3.0/go.mod h1:5LS6F96DhAwUc7C+1HLexzMXY1xGRSryjyPPKW6zv78=
-github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/golang/protobuf v1.3.2 h1:6nsPYzhq5kReh6QImI3k5qWzO4PEbvbIW2cwSfR/6xs=
-github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
-github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
-github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
-github.com/google/go-github/v30 v30.1.0 h1:VLDx+UolQICEOKu2m4uAoMti1SxuEBAl7RSEG16L+Oo=
-github.com/google/go-github/v30 v30.1.0/go.mod h1:n8jBpHl45a/rlBUtRJMOG4GhNADUQFEufcolZ95JfU8=
-github.com/google/go-querystring v1.0.0 h1:Xkwi/a1rcvNg1PPYe5vI8GbeBY/jrVuDX5ASuANWTrk=
-github.com/google/go-querystring v1.0.0/go.mod h1:odCYkC5MyYFN7vkCjXpyrEuKhc/BUO6wN/zVPAxq5ck=
-github.com/hpcloud/tail v1.0.0/go.mod h1:ab1qPbhIpdTxEkNHXyeSf5vhxWSCs/tWer42PpOxQnU=
-github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf h1:WfD7VjIE6z8dIvMsI4/s+1qr5EL+zoIGev1BQj1eoJ8=
-github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf/go.mod h1:hyb9oH7vZsitZCiBt0ZvifOrB+qc8PS5IiilCIb87rg=
-github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
-github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
-github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
-github.com/lufia/plan9stats v0.0.0-20240513124658-fba389f38bae h1:dIZY4ULFcto4tAFlj1FYZl8ztUZ13bdq+PLY+NOfbyI=
-github.com/lufia/plan9stats v0.0.0-20240513124658-fba389f38bae/go.mod h1:ilwx/Dta8jXAgpFYFvSWEMwxmbWXyiUHkd5FwyKhb5k=
-github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
-github.com/onsi/gomega v1.4.2 h1:3mYCb7aPxS/RU7TI1y4rkEn1oKmPRjNJLNEXgw7MH2I=
-github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1CpauHY=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 h1:o4JXh1EVt9k/+g42oCprj/FisM4qX9L3sZB3upGN2ZU=
-github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55/go.mod h1:OmDBASR4679mdNQnz2pUhc2G8CO2JrUAVFDRBDP/hJE=
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agent/gpu.go

@@ -0,0 +1,483 @@
+package agent
+
+import (
+	"bufio"
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"maps"
+	"os/exec"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"golang.org/x/exp/slog"
+)
+
+const (
+	// Commands
+	nvidiaSmiCmd  string = "nvidia-smi"
+	rocmSmiCmd    string = "rocm-smi"
+	tegraStatsCmd string = "tegrastats"
+
+	// Polling intervals
+	nvidiaSmiInterval  string        = "4"    // in seconds
+	tegraStatsInterval string        = "3700" // in milliseconds
+	rocmSmiInterval    time.Duration = 4300 * time.Millisecond
+	// Command retry and timeout constants
+	retryWaitTime     time.Duration = 5 * time.Second
+	maxFailureRetries int           = 5
+
+	// Unit Conversions
+	mebibytesInAMegabyte float64 = 1.024  // nvidia-smi reports memory in MiB
+	milliwattsInAWatt    float64 = 1000.0 // tegrastats reports power in mW
+)
+
+// GPUManager manages data collection for GPUs (either Nvidia or AMD)
+type GPUManager struct {
+	sync.Mutex
+	nvidiaSmi     bool
+	rocmSmi       bool
+	tegrastats    bool
+	intelGpuStats bool
+	GpuDataMap    map[string]*system.GPUData
+	// lastAvgData stores the last calculated averages for each GPU
+	// Used when a collection happens before new data arrives (Count == 0)
+	lastAvgData map[string]system.GPUData
+	// Per-cache-key tracking for delta calculations
+	// cacheKey -> gpuId -> snapshot of last count/usage/power values
+	lastSnapshots map[uint16]map[string]*gpuSnapshot
+}
+
+// gpuSnapshot stores the last observed incremental values for delta tracking
+type gpuSnapshot struct {
+	count    uint32
+	usage    float64
+	power    float64
+	powerPkg float64
+	engines  map[string]float64
+}
+
+// RocmSmiJson represents the JSON structure of rocm-smi output
+type RocmSmiJson struct {
+	ID           string `json:"GUID"`
+	Name         string `json:"Card series"`
+	Temperature  string `json:"Temperature (Sensor edge) (C)"`
+	MemoryUsed   string `json:"VRAM Total Used Memory (B)"`
+	MemoryTotal  string `json:"VRAM Total Memory (B)"`
+	Usage        string `json:"GPU use (%)"`
+	PowerPackage string `json:"Average Graphics Package Power (W)"`
+	PowerSocket  string `json:"Current Socket Graphics Package Power (W)"`
+}
+
+// gpuCollector defines a collector for a specific GPU management utility (nvidia-smi or rocm-smi)
+type gpuCollector struct {
+	name    string
+	cmdArgs []string
+	parse   func([]byte) bool // returns true if valid data was found
+	buf     []byte
+	bufSize uint16
+}
+
+var errNoValidData = fmt.Errorf("no valid GPU data found") // Error for missing data
+
+// starts and manages the ongoing collection of GPU data for the specified GPU management utility
+func (c *gpuCollector) start() {
+	for {
+		err := c.collect()
+		if err != nil {
+			if err == errNoValidData {
+				slog.Warn(c.name + " found no valid GPU data, stopping")
+				break
+			}
+			slog.Warn(c.name+" failed, restarting", "err", err)
+			time.Sleep(retryWaitTime)
+			continue
+		}
+	}
+}
+
+// collect executes the command, parses output with the assigned parser function
+func (c *gpuCollector) collect() error {
+	cmd := exec.Command(c.name, c.cmdArgs...)
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	scanner := bufio.NewScanner(stdout)
+	if c.buf == nil {
+		c.buf = make([]byte, 0, c.bufSize)
+	}
+	scanner.Buffer(c.buf, bufio.MaxScanTokenSize)
+
+	for scanner.Scan() {
+		hasValidData := c.parse(scanner.Bytes())
+		if !hasValidData {
+			return errNoValidData
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		return fmt.Errorf("scanner error: %w", err)
+	}
+	return cmd.Wait()
+}
+
+// getJetsonParser returns a function to parse the output of tegrastats and update the GPUData map
+func (gm *GPUManager) getJetsonParser() func(output []byte) bool {
+	// use closure to avoid recompiling the regex
+	ramPattern := regexp.MustCompile(`RAM (\d+)/(\d+)MB`)
+	gr3dPattern := regexp.MustCompile(`GR3D_FREQ (\d+)%`)
+	tempPattern := regexp.MustCompile(`tj@(\d+\.?\d*)C`)
+	// Orin Nano / NX do not have GPU specific power monitor
+	// TODO: Maybe use VDD_IN for Nano / NX and add a total system power chart
+	powerPattern := regexp.MustCompile(`(GPU_SOC|CPU_GPU_CV) (\d+)mW`)
+
+	// jetson devices have only one gpu so we'll just initialize here
+	gpuData := &system.GPUData{Name: "GPU"}
+	gm.GpuDataMap["0"] = gpuData
+
+	return func(output []byte) bool {
+		gm.Lock()
+		defer gm.Unlock()
+		// Parse RAM usage
+		ramMatches := ramPattern.FindSubmatch(output)
+		if ramMatches != nil {
+			gpuData.MemoryUsed, _ = strconv.ParseFloat(string(ramMatches[1]), 64)
+			gpuData.MemoryTotal, _ = strconv.ParseFloat(string(ramMatches[2]), 64)
+		}
+		// Parse GR3D (GPU) usage
+		gr3dMatches := gr3dPattern.FindSubmatch(output)
+		if gr3dMatches != nil {
+			gr3dUsage, _ := strconv.ParseFloat(string(gr3dMatches[1]), 64)
+			gpuData.Usage += gr3dUsage
+		}
+		// Parse temperature
+		tempMatches := tempPattern.FindSubmatch(output)
+		if tempMatches != nil {
+			gpuData.Temperature, _ = strconv.ParseFloat(string(tempMatches[1]), 64)
+		}
+		// Parse power usage
+		powerMatches := powerPattern.FindSubmatch(output)
+		if powerMatches != nil {
+			power, _ := strconv.ParseFloat(string(powerMatches[2]), 64)
+			gpuData.Power += power / milliwattsInAWatt
+		}
+		gpuData.Count++
+		return true
+	}
+}
+
+// parseNvidiaData parses the output of nvidia-smi and updates the GPUData map
+func (gm *GPUManager) parseNvidiaData(output []byte) bool {
+	gm.Lock()
+	defer gm.Unlock()
+	scanner := bufio.NewScanner(bytes.NewReader(output))
+	var valid bool
+	for scanner.Scan() {
+		line := scanner.Text() // Or use scanner.Bytes() for []byte
+		fields := strings.Split(strings.TrimSpace(line), ", ")
+		if len(fields) < 7 {
+			continue
+		}
+		valid = true
+		id := fields[0]
+		temp, _ := strconv.ParseFloat(fields[2], 64)
+		memoryUsage, _ := strconv.ParseFloat(fields[3], 64)
+		totalMemory, _ := strconv.ParseFloat(fields[4], 64)
+		usage, _ := strconv.ParseFloat(fields[5], 64)
+		power, _ := strconv.ParseFloat(fields[6], 64)
+		// add gpu if not exists
+		if _, ok := gm.GpuDataMap[id]; !ok {
+			name := strings.TrimPrefix(fields[1], "NVIDIA ")
+			gm.GpuDataMap[id] = &system.GPUData{Name: strings.TrimSuffix(name, " Laptop GPU")}
+		}
+		// update gpu data
+		gpu := gm.GpuDataMap[id]
+		gpu.Temperature = temp
+		gpu.MemoryUsed = memoryUsage / mebibytesInAMegabyte
+		gpu.MemoryTotal = totalMemory / mebibytesInAMegabyte
+		gpu.Usage += usage
+		gpu.Power += power
+		gpu.Count++
+	}
+	return valid
+}
+
+// parseAmdData parses the output of rocm-smi and updates the GPUData map
+func (gm *GPUManager) parseAmdData(output []byte) bool {
+	var rocmSmiInfo map[string]RocmSmiJson
+	if err := json.Unmarshal(output, &rocmSmiInfo); err != nil || len(rocmSmiInfo) == 0 {
+		return false
+	}
+	gm.Lock()
+	defer gm.Unlock()
+	for _, v := range rocmSmiInfo {
+		var power float64
+		if v.PowerPackage != "" {
+			power, _ = strconv.ParseFloat(v.PowerPackage, 64)
+		} else {
+			power, _ = strconv.ParseFloat(v.PowerSocket, 64)
+		}
+		memoryUsage, _ := strconv.ParseFloat(v.MemoryUsed, 64)
+		totalMemory, _ := strconv.ParseFloat(v.MemoryTotal, 64)
+		usage, _ := strconv.ParseFloat(v.Usage, 64)
+
+		if _, ok := gm.GpuDataMap[v.ID]; !ok {
+			gm.GpuDataMap[v.ID] = &system.GPUData{Name: v.Name}
+		}
+		gpu := gm.GpuDataMap[v.ID]
+		gpu.Temperature, _ = strconv.ParseFloat(v.Temperature, 64)
+		gpu.MemoryUsed = bytesToMegabytes(memoryUsage)
+		gpu.MemoryTotal = bytesToMegabytes(totalMemory)
+		gpu.Usage += usage
+		gpu.Power += power
+		gpu.Count++
+	}
+	return true
+}
+
+// GetCurrentData returns GPU utilization data averaged since the last call with this cacheKey
+func (gm *GPUManager) GetCurrentData(cacheKey uint16) map[string]system.GPUData {
+	gm.Lock()
+	defer gm.Unlock()
+
+	gm.initializeSnapshots(cacheKey)
+	nameCounts := gm.countGPUNames()
+
+	gpuData := make(map[string]system.GPUData, len(gm.GpuDataMap))
+	for id, gpu := range gm.GpuDataMap {
+		gpuAvg := gm.calculateGPUAverage(id, gpu, cacheKey)
+		gm.updateInstantaneousValues(&gpuAvg, gpu)
+		gm.storeSnapshot(id, gpu, cacheKey)
+
+		// Append id to name if there are multiple GPUs with the same name
+		if nameCounts[gpu.Name] > 1 {
+			gpuAvg.Name = fmt.Sprintf("%s %s", gpu.Name, id)
+		}
+		gpuData[id] = gpuAvg
+	}
+	slog.Debug("GPU", "data", gpuData)
+	return gpuData
+}
+
+// initializeSnapshots ensures snapshot maps are initialized for the given cache key
+func (gm *GPUManager) initializeSnapshots(cacheKey uint16) {
+	if gm.lastAvgData == nil {
+		gm.lastAvgData = make(map[string]system.GPUData)
+	}
+	if gm.lastSnapshots == nil {
+		gm.lastSnapshots = make(map[uint16]map[string]*gpuSnapshot)
+	}
+	if gm.lastSnapshots[cacheKey] == nil {
+		gm.lastSnapshots[cacheKey] = make(map[string]*gpuSnapshot)
+	}
+}
+
+// countGPUNames returns a map of GPU names to their occurrence count
+func (gm *GPUManager) countGPUNames() map[string]int {
+	nameCounts := make(map[string]int)
+	for _, gpu := range gm.GpuDataMap {
+		nameCounts[gpu.Name]++
+	}
+	return nameCounts
+}
+
+// calculateGPUAverage computes the average GPU metrics since the last snapshot for this cache key
+func (gm *GPUManager) calculateGPUAverage(id string, gpu *system.GPUData, cacheKey uint16) system.GPUData {
+	lastSnapshot := gm.lastSnapshots[cacheKey][id]
+	currentCount := uint32(gpu.Count)
+	deltaCount := gm.calculateDeltaCount(currentCount, lastSnapshot)
+
+	// If no new data arrived, use last known average
+	if deltaCount == 0 {
+		return gm.lastAvgData[id] // zero value if not found
+	}
+
+	// Calculate new average
+	gpuAvg := *gpu
+	deltaUsage, deltaPower, deltaPowerPkg := gm.calculateDeltas(gpu, lastSnapshot)
+
+	gpuAvg.Power = twoDecimals(deltaPower / float64(deltaCount))
+
+	if gpu.Engines != nil {
+		// make fresh map for averaged engine metrics to avoid mutating
+		// the accumulator map stored in gm.GpuDataMap
+		gpuAvg.Engines = make(map[string]float64, len(gpu.Engines))
+		gpuAvg.Usage = gm.calculateIntelGPUUsage(&gpuAvg, gpu, lastSnapshot, deltaCount)
+		gpuAvg.PowerPkg = twoDecimals(deltaPowerPkg / float64(deltaCount))
+	} else {
+		gpuAvg.Usage = twoDecimals(deltaUsage / float64(deltaCount))
+	}
+
+	gm.lastAvgData[id] = gpuAvg
+	return gpuAvg
+}
+
+// calculateDeltaCount returns the change in count since the last snapshot
+func (gm *GPUManager) calculateDeltaCount(currentCount uint32, lastSnapshot *gpuSnapshot) uint32 {
+	if lastSnapshot != nil {
+		return currentCount - lastSnapshot.count
+	}
+	return currentCount
+}
+
+// calculateDeltas computes the change in usage, power, and powerPkg since the last snapshot
+func (gm *GPUManager) calculateDeltas(gpu *system.GPUData, lastSnapshot *gpuSnapshot) (deltaUsage, deltaPower, deltaPowerPkg float64) {
+	if lastSnapshot != nil {
+		return gpu.Usage - lastSnapshot.usage,
+			gpu.Power - lastSnapshot.power,
+			gpu.PowerPkg - lastSnapshot.powerPkg
+	}
+	return gpu.Usage, gpu.Power, gpu.PowerPkg
+}
+
+// calculateIntelGPUUsage computes Intel GPU usage from engine metrics and returns max engine usage
+func (gm *GPUManager) calculateIntelGPUUsage(gpuAvg, gpu *system.GPUData, lastSnapshot *gpuSnapshot, deltaCount uint32) float64 {
+	maxEngineUsage := 0.0
+	for name, engine := range gpu.Engines {
+		var deltaEngine float64
+		if lastSnapshot != nil && lastSnapshot.engines != nil {
+			deltaEngine = engine - lastSnapshot.engines[name]
+		} else {
+			deltaEngine = engine
+		}
+		gpuAvg.Engines[name] = twoDecimals(deltaEngine / float64(deltaCount))
+		maxEngineUsage = max(maxEngineUsage, deltaEngine/float64(deltaCount))
+	}
+	return twoDecimals(maxEngineUsage)
+}
+
+// updateInstantaneousValues updates values that should reflect current state, not averages
+func (gm *GPUManager) updateInstantaneousValues(gpuAvg *system.GPUData, gpu *system.GPUData) {
+	gpuAvg.Temperature = twoDecimals(gpu.Temperature)
+	gpuAvg.MemoryUsed = twoDecimals(gpu.MemoryUsed)
+	gpuAvg.MemoryTotal = twoDecimals(gpu.MemoryTotal)
+}
+
+// storeSnapshot saves the current GPU state for this cache key
+func (gm *GPUManager) storeSnapshot(id string, gpu *system.GPUData, cacheKey uint16) {
+	snapshot := &gpuSnapshot{
+		count:    uint32(gpu.Count),
+		usage:    gpu.Usage,
+		power:    gpu.Power,
+		powerPkg: gpu.PowerPkg,
+	}
+	if gpu.Engines != nil {
+		snapshot.engines = make(map[string]float64, len(gpu.Engines))
+		maps.Copy(snapshot.engines, gpu.Engines)
+	}
+	gm.lastSnapshots[cacheKey][id] = snapshot
+}
+
+// detectGPUs checks for the presence of GPU management tools (nvidia-smi, rocm-smi, tegrastats)
+// in the system path. It sets the corresponding flags in the GPUManager struct if any of these
+// tools are found. If none of the tools are found, it returns an error indicating that no GPU
+// management tools are available.
+func (gm *GPUManager) detectGPUs() error {
+	if _, err := exec.LookPath(nvidiaSmiCmd); err == nil {
+		gm.nvidiaSmi = true
+	}
+	if _, err := exec.LookPath(rocmSmiCmd); err == nil {
+		gm.rocmSmi = true
+	}
+	if _, err := exec.LookPath(tegraStatsCmd); err == nil {
+		gm.tegrastats = true
+		gm.nvidiaSmi = false
+	}
+	if _, err := exec.LookPath(intelGpuStatsCmd); err == nil {
+		gm.intelGpuStats = true
+	}
+	if gm.nvidiaSmi || gm.rocmSmi || gm.tegrastats || gm.intelGpuStats {
+		return nil
+	}
+	return fmt.Errorf("no GPU found - install nvidia-smi, rocm-smi, tegrastats, or intel_gpu_top")
+}
+
+// startCollector starts the appropriate GPU data collector based on the command
+func (gm *GPUManager) startCollector(command string) {
+	collector := gpuCollector{
+		name:    command,
+		bufSize: 10 * 1024,
+	}
+	switch command {
+	case intelGpuStatsCmd:
+		go func() {
+			failures := 0
+			for {
+				if err := gm.collectIntelStats(); err != nil {
+					failures++
+					if failures > maxFailureRetries {
+						break
+					}
+					slog.Warn("Error collecting Intel GPU data; see https://beszel.dev/guide/gpu", "err", err)
+					time.Sleep(retryWaitTime)
+					continue
+				}
+			}
+		}()
+	case nvidiaSmiCmd:
+		collector.cmdArgs = []string{
+			"-l", nvidiaSmiInterval,
+			"--query-gpu=index,name,temperature.gpu,memory.used,memory.total,utilization.gpu,power.draw",
+			"--format=csv,noheader,nounits",
+		}
+		collector.parse = gm.parseNvidiaData
+		go collector.start()
+	case tegraStatsCmd:
+		collector.cmdArgs = []string{"--interval", tegraStatsInterval}
+		collector.parse = gm.getJetsonParser()
+		go collector.start()
+	case rocmSmiCmd:
+		collector.cmdArgs = []string{"--showid", "--showtemp", "--showuse", "--showpower", "--showproductname", "--showmeminfo", "vram", "--json"}
+		collector.parse = gm.parseAmdData
+		go func() {
+			failures := 0
+			for {
+				if err := collector.collect(); err != nil {
+					failures++
+					if failures > maxFailureRetries {
+						break
+					}
+					slog.Warn("Error collecting AMD GPU data", "err", err)
+				}
+				time.Sleep(rocmSmiInterval)
+			}
+		}()
+	}
+}
+
+// NewGPUManager creates and initializes a new GPUManager
+func NewGPUManager() (*GPUManager, error) {
+	if skipGPU, _ := GetEnv("SKIP_GPU"); skipGPU == "true" {
+		return nil, nil
+	}
+	var gm GPUManager
+	if err := gm.detectGPUs(); err != nil {
+		return nil, err
+	}
+	gm.GpuDataMap = make(map[string]*system.GPUData)
+
+	if gm.nvidiaSmi {
+		gm.startCollector(nvidiaSmiCmd)
+	}
+	if gm.rocmSmi {
+		gm.startCollector(rocmSmiCmd)
+	}
+	if gm.tegrastats {
+		gm.startCollector(tegraStatsCmd)
+	}
+	if gm.intelGpuStats {
+		gm.startCollector(intelGpuStatsCmd)
+	}
+
+	return &gm, nil
+}

agent/gpu_intel.go

@@ -0,0 +1,199 @@
+package agent
+
+import (
+	"bufio"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+)
+
+const (
+	intelGpuStatsCmd      string = "intel_gpu_top"
+	intelGpuStatsInterval string = "3300" // in milliseconds
+)
+
+type intelGpuStats struct {
+	PowerGPU float64
+	PowerPkg float64
+	Engines  map[string]float64
+}
+
+// updateIntelFromStats updates aggregated GPU data from a single intelGpuStats sample
+func (gm *GPUManager) updateIntelFromStats(sample *intelGpuStats) bool {
+	gm.Lock()
+	defer gm.Unlock()
+
+	// only one gpu for now - cmd doesn't provide all by default
+	gpuData, ok := gm.GpuDataMap["0"]
+	if !ok {
+		gpuData = &system.GPUData{Name: "GPU", Engines: make(map[string]float64)}
+		gm.GpuDataMap["0"] = gpuData
+	}
+
+	gpuData.Power += sample.PowerGPU
+	gpuData.PowerPkg += sample.PowerPkg
+
+	if gpuData.Engines == nil {
+		gpuData.Engines = make(map[string]float64, len(sample.Engines))
+	}
+	for name, engine := range sample.Engines {
+		gpuData.Engines[name] += engine
+	}
+
+	gpuData.Count++
+	return true
+}
+
+// collectIntelStats executes intel_gpu_top in text mode (-l) and parses the output
+func (gm *GPUManager) collectIntelStats() (err error) {
+	cmd := exec.Command(intelGpuStatsCmd, "-s", intelGpuStatsInterval, "-l")
+	// Avoid blocking if intel_gpu_top writes to stderr
+	cmd.Stderr = io.Discard
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	// Ensure we always reap the child to avoid zombies on any return path and
+	// propagate a non-zero exit code if no other error was set.
+	defer func() {
+		// Best-effort close of the pipe (unblock the child if it writes)
+		_ = stdout.Close()
+		if cmd.ProcessState == nil || !cmd.ProcessState.Exited() {
+			_ = cmd.Process.Kill()
+		}
+		if waitErr := cmd.Wait(); err == nil && waitErr != nil {
+			err = waitErr
+		}
+	}()
+
+	scanner := bufio.NewScanner(stdout)
+	var header1 string
+	var engineNames []string
+	var friendlyNames []string
+	var preEngineCols int
+	var powerIndex int
+	var hadDataRow bool
+	// skip first data row because it sometimes has erroneous data
+	var skippedFirstDataRow bool
+
+	for scanner.Scan() {
+		line := strings.TrimSpace(scanner.Text())
+		if line == "" {
+			continue
+		}
+
+		// first header line
+		if strings.HasPrefix(line, "Freq") {
+			header1 = line
+			continue
+		}
+
+		// second header line
+		if strings.HasPrefix(line, "req") {
+			engineNames, friendlyNames, powerIndex, preEngineCols = gm.parseIntelHeaders(header1, line)
+			continue
+		}
+
+		// Data row
+		if !skippedFirstDataRow {
+			skippedFirstDataRow = true
+			continue
+		}
+		sample, err := gm.parseIntelData(line, engineNames, friendlyNames, powerIndex, preEngineCols)
+		if err != nil {
+			return err
+		}
+		hadDataRow = true
+		gm.updateIntelFromStats(&sample)
+	}
+	if scanErr := scanner.Err(); scanErr != nil {
+		return scanErr
+	}
+	if !hadDataRow {
+		return errNoValidData
+	}
+	return nil
+}
+
+func (gm *GPUManager) parseIntelHeaders(header1 string, header2 string) (engineNames []string, friendlyNames []string, powerIndex int, preEngineCols int) {
+	// Build indexes
+	h1 := strings.Fields(header1)
+	h2 := strings.Fields(header2)
+	powerIndex = -1 // Initialize to -1, will be set to actual index if found
+	// Collect engine names from header1
+	for _, col := range h1 {
+		key := strings.TrimRightFunc(col, func(r rune) bool { return r >= '0' && r <= '9' })
+		var friendly string
+		switch key {
+		case "RCS":
+			friendly = "Render/3D"
+		case "BCS":
+			friendly = "Blitter"
+		case "VCS":
+			friendly = "Video"
+		case "VECS":
+			friendly = "VideoEnhance"
+		case "CCS":
+			friendly = "Compute"
+		default:
+			continue
+		}
+		engineNames = append(engineNames, key)
+		friendlyNames = append(friendlyNames, friendly)
+	}
+	// find power gpu index among pre-engine columns
+	if n := len(engineNames); n > 0 {
+		preEngineCols = max(len(h2)-3*n, 0)
+		limit := min(len(h2), preEngineCols)
+		for i := range limit {
+			if strings.EqualFold(h2[i], "gpu") {
+				powerIndex = i
+				break
+			}
+		}
+	}
+	return engineNames, friendlyNames, powerIndex, preEngineCols
+}
+
+func (gm *GPUManager) parseIntelData(line string, engineNames []string, friendlyNames []string, powerIndex int, preEngineCols int) (sample intelGpuStats, err error) {
+	fields := strings.Fields(line)
+	if len(fields) == 0 {
+		return sample, errNoValidData
+	}
+	// Make sure row has enough columns for engines
+	if need := preEngineCols + 3*len(engineNames); len(fields) < need {
+		return sample, errNoValidData
+	}
+	if powerIndex >= 0 && powerIndex < len(fields) {
+		if v, perr := strconv.ParseFloat(fields[powerIndex], 64); perr == nil {
+			sample.PowerGPU = v
+		}
+		if v, perr := strconv.ParseFloat(fields[powerIndex+1], 64); perr == nil {
+			sample.PowerPkg = v
+		}
+	}
+	if len(engineNames) > 0 {
+		sample.Engines = make(map[string]float64, len(engineNames))
+		for k := range engineNames {
+			base := preEngineCols + 3*k
+			if base < len(fields) {
+				busy := 0.0
+				if v, e := strconv.ParseFloat(fields[base], 64); e == nil {
+					busy = v
+				}
+				cur := sample.Engines[friendlyNames[k]]
+				sample.Engines[friendlyNames[k]] = cur + busy
+			} else {
+				sample.Engines[friendlyNames[k]] = 0
+			}
+		}
+	}
+	return sample, nil
+}

agent/handlers.go

@@ -0,0 +1,176 @@
+package agent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/henrygd/beszel/internal/common"
+	"github.com/henrygd/beszel/internal/entities/smart"
+
+	"golang.org/x/exp/slog"
+)
+
+// HandlerContext provides context for request handlers
+type HandlerContext struct {
+	Client      *WebSocketClient
+	Agent       *Agent
+	Request     *common.HubRequest[cbor.RawMessage]
+	RequestID   *uint32
+	HubVerified bool
+	// SendResponse abstracts how a handler sends responses (WS or SSH)
+	SendResponse func(data any, requestID *uint32) error
+}
+
+// RequestHandler defines the interface for handling specific websocket request types
+type RequestHandler interface {
+	// Handle processes the request and returns an error if unsuccessful
+	Handle(hctx *HandlerContext) error
+}
+
+// Responder sends handler responses back to the hub (over WS or SSH)
+type Responder interface {
+	SendResponse(data any, requestID *uint32) error
+}
+
+// HandlerRegistry manages the mapping between actions and their handlers
+type HandlerRegistry struct {
+	handlers map[common.WebSocketAction]RequestHandler
+}
+
+// NewHandlerRegistry creates a new handler registry with default handlers
+func NewHandlerRegistry() *HandlerRegistry {
+	registry := &HandlerRegistry{
+		handlers: make(map[common.WebSocketAction]RequestHandler),
+	}
+
+	registry.Register(common.GetData, &GetDataHandler{})
+	registry.Register(common.CheckFingerprint, &CheckFingerprintHandler{})
+	registry.Register(common.GetContainerLogs, &GetContainerLogsHandler{})
+	registry.Register(common.GetContainerInfo, &GetContainerInfoHandler{})
+	registry.Register(common.GetSmartData, &GetSmartDataHandler{})
+
+	return registry
+}
+
+// Register registers a handler for a specific action type
+func (hr *HandlerRegistry) Register(action common.WebSocketAction, handler RequestHandler) {
+	hr.handlers[action] = handler
+}
+
+// Handle routes the request to the appropriate handler
+func (hr *HandlerRegistry) Handle(hctx *HandlerContext) error {
+	handler, exists := hr.handlers[hctx.Request.Action]
+	if !exists {
+		return fmt.Errorf("unknown action: %d", hctx.Request.Action)
+	}
+
+	// Check verification requirement - default to requiring verification
+	if hctx.Request.Action != common.CheckFingerprint && !hctx.HubVerified {
+		return errors.New("hub not verified")
+	}
+
+	// Log handler execution for debugging
+	// slog.Debug("Executing handler", "action", hctx.Request.Action)
+
+	return handler.Handle(hctx)
+}
+
+// GetHandler returns the handler for a specific action
+func (hr *HandlerRegistry) GetHandler(action common.WebSocketAction) (RequestHandler, bool) {
+	handler, exists := hr.handlers[action]
+	return handler, exists
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// GetDataHandler handles system data requests
+type GetDataHandler struct{}
+
+func (h *GetDataHandler) Handle(hctx *HandlerContext) error {
+	var options common.DataRequestOptions
+	_ = cbor.Unmarshal(hctx.Request.Data, &options)
+
+	sysStats := hctx.Agent.gatherStats(options.CacheTimeMs)
+	return hctx.SendResponse(sysStats, hctx.RequestID)
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// CheckFingerprintHandler handles authentication challenges
+type CheckFingerprintHandler struct{}
+
+func (h *CheckFingerprintHandler) Handle(hctx *HandlerContext) error {
+	return hctx.Client.handleAuthChallenge(hctx.Request, hctx.RequestID)
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// GetContainerLogsHandler handles container log requests
+type GetContainerLogsHandler struct{}
+
+func (h *GetContainerLogsHandler) Handle(hctx *HandlerContext) error {
+	if hctx.Agent.dockerManager == nil {
+		return hctx.SendResponse("", hctx.RequestID)
+	}
+
+	var req common.ContainerLogsRequest
+	if err := cbor.Unmarshal(hctx.Request.Data, &req); err != nil {
+		return err
+	}
+
+	ctx := context.Background()
+	logContent, err := hctx.Agent.dockerManager.getLogs(ctx, req.ContainerID)
+	if err != nil {
+		return err
+	}
+
+	return hctx.SendResponse(logContent, hctx.RequestID)
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// GetContainerInfoHandler handles container info requests
+type GetContainerInfoHandler struct{}
+
+func (h *GetContainerInfoHandler) Handle(hctx *HandlerContext) error {
+	if hctx.Agent.dockerManager == nil {
+		return hctx.SendResponse("", hctx.RequestID)
+	}
+
+	var req common.ContainerInfoRequest
+	if err := cbor.Unmarshal(hctx.Request.Data, &req); err != nil {
+		return err
+	}
+
+	ctx := context.Background()
+	info, err := hctx.Agent.dockerManager.getContainerInfo(ctx, req.ContainerID)
+	if err != nil {
+		return err
+	}
+
+	return hctx.SendResponse(string(info), hctx.RequestID)
+}
+
+////////////////////////////////////////////////////////////////////////////
+////////////////////////////////////////////////////////////////////////////
+
+// GetSmartDataHandler handles SMART data requests
+type GetSmartDataHandler struct{}
+
+func (h *GetSmartDataHandler) Handle(hctx *HandlerContext) error {
+	if hctx.Agent.smartManager == nil {
+		// return empty map to indicate no data
+		return hctx.SendResponse(map[string]smart.SmartData{}, hctx.RequestID)
+	}
+	if err := hctx.Agent.smartManager.Refresh(); err != nil {
+		slog.Debug("smart refresh failed", "err", err)
+	}
+	data := hctx.Agent.smartManager.GetCurrentData()
+	return hctx.SendResponse(data, hctx.RequestID)
+}

agent/handlers_test.go

@@ -0,0 +1,112 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"testing"
+
+	"github.com/fxamacker/cbor/v2"
+	"github.com/henrygd/beszel/internal/common"
+	"github.com/stretchr/testify/assert"
+)
+
+// MockHandler for testing
+type MockHandler struct {
+	requiresVerification bool
+	description          string
+	handleFunc           func(ctx *HandlerContext) error
+}
+
+func (m *MockHandler) Handle(ctx *HandlerContext) error {
+	if m.handleFunc != nil {
+		return m.handleFunc(ctx)
+	}
+	return nil
+}
+
+func (m *MockHandler) RequiresVerification() bool {
+	return m.requiresVerification
+}
+
+// TestHandlerRegistry tests the handler registry functionality
+func TestHandlerRegistry(t *testing.T) {
+	t.Run("default registration", func(t *testing.T) {
+		registry := NewHandlerRegistry()
+
+		// Check default handlers are registered
+		getDataHandler, exists := registry.GetHandler(common.GetData)
+		assert.True(t, exists)
+		assert.IsType(t, &GetDataHandler{}, getDataHandler)
+
+		fingerprintHandler, exists := registry.GetHandler(common.CheckFingerprint)
+		assert.True(t, exists)
+		assert.IsType(t, &CheckFingerprintHandler{}, fingerprintHandler)
+	})
+
+	t.Run("custom handler registration", func(t *testing.T) {
+		registry := NewHandlerRegistry()
+		mockHandler := &MockHandler{
+			requiresVerification: true,
+			description:          "Test handler",
+		}
+
+		// Register a custom handler for a mock action
+		const mockAction common.WebSocketAction = 99
+		registry.Register(mockAction, mockHandler)
+
+		// Verify registration
+		handler, exists := registry.GetHandler(mockAction)
+		assert.True(t, exists)
+		assert.Equal(t, mockHandler, handler)
+	})
+
+	t.Run("unknown action", func(t *testing.T) {
+		registry := NewHandlerRegistry()
+		ctx := &HandlerContext{
+			Request: &common.HubRequest[cbor.RawMessage]{
+				Action: common.WebSocketAction(255), // Unknown action
+			},
+			HubVerified: true,
+		}
+
+		err := registry.Handle(ctx)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "unknown action: 255")
+	})
+
+	t.Run("verification required", func(t *testing.T) {
+		registry := NewHandlerRegistry()
+		ctx := &HandlerContext{
+			Request: &common.HubRequest[cbor.RawMessage]{
+				Action: common.GetData, // Requires verification
+			},
+			HubVerified: false, // Not verified
+		}
+
+		err := registry.Handle(ctx)
+		assert.Error(t, err)
+		assert.Contains(t, err.Error(), "hub not verified")
+	})
+}
+
+// TestCheckFingerprintHandler tests the CheckFingerprint handler
+func TestCheckFingerprintHandler(t *testing.T) {
+	handler := &CheckFingerprintHandler{}
+
+	t.Run("handle with invalid data", func(t *testing.T) {
+		client := &WebSocketClient{}
+		ctx := &HandlerContext{
+			Client:      client,
+			HubVerified: false,
+			Request: &common.HubRequest[cbor.RawMessage]{
+				Action: common.CheckFingerprint,
+				Data:   cbor.RawMessage{}, // Empty/invalid data
+			},
+		}
+
+		// Should fail to decode the fingerprint request
+		err := handler.Handle(ctx)
+		assert.Error(t, err)
+	})
+}

agent/health/health.go

@@ -0,0 +1,43 @@
+// Package health provides functions to check and update the health of the agent.
+// It uses a file in the temp directory to store the timestamp of the last connection attempt.
+// If the timestamp is older than 90 seconds, the agent is considered unhealthy.
+// NB: The agent must be started with the Start() method to be considered healthy.
+package health
+
+import (
+	"errors"
+	"log"
+	"os"
+	"path/filepath"
+	"time"
+)
+
+// healthFile is the path to the health file
+var healthFile = filepath.Join(os.TempDir(), "beszel_health")
+
+// Check checks if the agent is connected by checking the modification time of the health file
+func Check() error {
+	fileInfo, err := os.Stat(healthFile)
+	if err != nil {
+		return err
+	}
+	if time.Since(fileInfo.ModTime()) > 91*time.Second {
+		log.Println("over 90 seconds since last connection")
+		return errors.New("unhealthy")
+	}
+	return nil
+}
+
+// Update updates the modification time of the health file
+func Update() error {
+	file, err := os.Create(healthFile)
+	if err != nil {
+		return err
+	}
+	return file.Close()
+}
+
+// CleanUp removes the health file
+func CleanUp() error {
+	return os.Remove(healthFile)
+}

agent/health/health_test.go

@@ -0,0 +1,67 @@
+//go:build testing
+// +build testing
+
+package health
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	"testing/synctest"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestHealth(t *testing.T) {
+	// Override healthFile to use a temporary directory for this test.
+	originalHealthFile := healthFile
+	tmpDir := t.TempDir()
+	healthFile = filepath.Join(tmpDir, "beszel_health_test")
+	defer func() { healthFile = originalHealthFile }()
+
+	t.Run("check with no health file", func(t *testing.T) {
+		err := Check()
+		require.Error(t, err)
+		assert.True(t, os.IsNotExist(err), "expected a file-not-exist error, but got: %v", err)
+	})
+
+	t.Run("update and check", func(t *testing.T) {
+		err := Update()
+		require.NoError(t, err, "Update() failed")
+
+		err = Check()
+		assert.NoError(t, err, "Check() failed immediately after Update()")
+	})
+
+	// This test uses synctest to simulate time passing.
+	// NOTE: This test requires GOEXPERIMENT=synctest to run.
+	t.Run("check with simulated time", func(t *testing.T) {
+		synctest.Test(t, func(t *testing.T) {
+			// Update the file to set the initial timestamp.
+			require.NoError(t, Update(), "Update() failed inside synctest")
+
+			// Set the mtime to the current fake time to align the file's timestamp with the simulated clock.
+			now := time.Now()
+			require.NoError(t, os.Chtimes(healthFile, now, now), "Chtimes failed")
+
+			// Wait a duration less than the threshold.
+			time.Sleep(89 * time.Second)
+			synctest.Wait()
+
+			// The check should still pass.
+			assert.NoError(t, Check(), "Check() failed after 89s")
+
+			// Wait for the total duration to exceed the threshold.
+			time.Sleep(5 * time.Second)
+			synctest.Wait()
+
+			// The check should now fail as unhealthy.
+			err := Check()
+			require.Error(t, err, "Check() should have failed after 91s")
+			assert.Equal(t, "unhealthy", err.Error(), "Check() returned wrong error")
+		})
+	})
+}

agent/lhm/beszel_lhm.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Globalization;
+using LibreHardwareMonitor.Hardware;
+
+class Program
+{
+  static void Main()
+  {
+    var computer = new Computer
+    {
+      IsCpuEnabled = true,
+      IsGpuEnabled = true,
+      IsMemoryEnabled = true,
+      IsMotherboardEnabled = true,
+      IsStorageEnabled = true,
+      // IsPsuEnabled = true,
+      // IsNetworkEnabled = true,
+    };
+    computer.Open();
+
+    var reader = Console.In;
+    var writer = Console.Out;
+
+    string line;
+    while ((line = reader.ReadLine()) != null)
+    {
+      if (line.Trim().Equals("getTemps", StringComparison.OrdinalIgnoreCase))
+      {
+        foreach (var hw in computer.Hardware)
+        {
+          // process main hardware sensors
+          ProcessSensors(hw, writer);
+
+          // process subhardware sensors
+          foreach (var subhardware in hw.SubHardware)
+          {
+            ProcessSensors(subhardware, writer);
+          }
+        }
+        // send empty line to signal end of sensor data
+        writer.WriteLine();
+        writer.Flush();
+      }
+    }
+
+    computer.Close();
+  }
+
+  static void ProcessSensors(IHardware hardware, System.IO.TextWriter writer)
+  {
+    var updated = false;
+    foreach (var sensor in hardware.Sensors)
+    {
+      var validTemp = sensor.SensorType == SensorType.Temperature && sensor.Value.HasValue;
+      if (!validTemp || sensor.Name.Contains("Distance"))
+      {
+        continue;
+      }
+
+      if (!updated)
+      {
+        hardware.Update();
+        updated = true;
+      }
+
+      var name = sensor.Name;
+      // if sensor.Name starts with "Temperature" replace with hardware.Identifier but retain the rest of the name.
+      // usually this is a number like Temperature 3
+      if (sensor.Name.StartsWith("Temperature"))
+      {
+        name = hardware.Identifier.ToString().Replace("/", "_").TrimStart('_') + sensor.Name.Substring(11);
+      }
+
+      // invariant culture assures the value is parsable as a float
+      var value = sensor.Value.Value.ToString("0.##", CultureInfo.InvariantCulture);
+      // write the name and value to the writer
+      writer.WriteLine($"{name}|{value}");
+    }
+  }
+}

agent/lhm/beszel_lhm.csproj

@@ -0,0 +1,11 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>net48</TargetFramework>
+    <Platforms>x64</Platforms>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="LibreHardwareMonitorLib" Version="0.9.4" />
+  </ItemGroup>
+</Project>

agent/main.go

@@ -1,379 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"log"
-	"math"
-	"net"
-	"net/http"
-	"os"
-	"strings"
-	"sync"
-	"time"
-
-	sshServer "github.com/gliderlabs/ssh"
-
-	"github.com/shirou/gopsutil/v4/cpu"
-	"github.com/shirou/gopsutil/v4/disk"
-	"github.com/shirou/gopsutil/v4/host"
-	"github.com/shirou/gopsutil/v4/mem"
-	psutilNet "github.com/shirou/gopsutil/v4/net"
-)
-
-var Version = "0.0.1-alpha.9"
-
-var containerCpuMap = make(map[string][2]uint64)
-var containerCpuMutex = &sync.Mutex{}
-
-var sem = make(chan struct{}, 15)
-
-func acquireSemaphore() {
-	sem <- struct{}{}
-}
-
-func releaseSemaphore() {
-	<-sem
-}
-
-var diskIoStats = DiskIoStats{
-	Read:       0,
-	Write:      0,
-	Time:       time.Now(),
-	Filesystem: "",
-}
-
-var netIoStats = NetIoStats{
-	BytesRecv: 0,
-	BytesSent: 0,
-	Time:      time.Now(),
-	Name:      "",
-}
-
-// client for docker engine api
-var client = &http.Client{
-	Timeout: time.Second,
-	Transport: &http.Transport{
-		Dial: func(proto, addr string) (net.Conn, error) {
-			return net.Dial("unix", "/var/run/docker.sock")
-		},
-		ForceAttemptHTTP2:   false,
-		IdleConnTimeout:     90 * time.Second,
-		DisableCompression:  true,
-		MaxIdleConnsPerHost: 50,
-		DisableKeepAlives:   false,
-	},
-}
-
-func getSystemStats() (*SystemInfo, *SystemStats) {
-	c, _ := cpu.Percent(0, false)
-	v, _ := mem.VirtualMemory()
-	d, _ := disk.Usage("/")
-
-	cpuPct := twoDecimals(c[0])
-	memPct := twoDecimals(v.UsedPercent)
-	diskPct := twoDecimals(d.UsedPercent)
-
-	systemStats := &SystemStats{
-		Cpu:          cpuPct,
-		Mem:          bytesToGigabytes(v.Total),
-		MemUsed:      bytesToGigabytes(v.Used),
-		MemBuffCache: bytesToGigabytes(v.Total - v.Free - v.Used),
-		MemPct:       memPct,
-		Disk:         bytesToGigabytes(d.Total),
-		DiskUsed:     bytesToGigabytes(d.Used),
-		DiskPct:      diskPct,
-	}
-
-	systemInfo := &SystemInfo{
-		Cpu:     cpuPct,
-		MemPct:  memPct,
-		DiskPct: diskPct,
-	}
-
-	// add disk stats
-	if io, err := disk.IOCounters(diskIoStats.Filesystem); err == nil {
-		for _, d := range io {
-			// add to systemStats
-			secondsElapsed := time.Since(diskIoStats.Time).Seconds()
-			readPerSecond := float64(d.ReadBytes-diskIoStats.Read) / secondsElapsed
-			systemStats.DiskRead = bytesToMegabytes(readPerSecond)
-			writePerSecond := float64(d.WriteBytes-diskIoStats.Write) / secondsElapsed
-			systemStats.DiskWrite = bytesToMegabytes(writePerSecond)
-			// update diskIoStats
-			diskIoStats.Time = time.Now()
-			diskIoStats.Read = d.ReadBytes
-			diskIoStats.Write = d.WriteBytes
-		}
-	}
-
-	// add network stats
-	if netIO, err := psutilNet.IOCounters(true); err == nil {
-		bytesSent := uint64(0)
-		bytesRecv := uint64(0)
-		for _, v := range netIO {
-			if skipNetworkInterface(v.Name) {
-				continue
-			}
-			// log.Printf("%+v: %+v recv, %+v sent\n", v.Name, v.BytesRecv, v.BytesSent)
-			bytesSent += v.BytesSent
-			bytesRecv += v.BytesRecv
-		}
-		// add to systemStats
-		secondsElapsed := time.Since(netIoStats.Time).Seconds()
-		sentPerSecond := float64(bytesSent-netIoStats.BytesSent) / secondsElapsed
-		recvPerSecond := float64(bytesRecv-netIoStats.BytesRecv) / secondsElapsed
-		systemStats.NetworkSent = bytesToMegabytes(sentPerSecond)
-		systemStats.NetworkRecv = bytesToMegabytes(recvPerSecond)
-		// update netIoStats
-		netIoStats.BytesSent = bytesSent
-		netIoStats.BytesRecv = bytesRecv
-		netIoStats.Time = time.Now()
-	}
-
-	// add host stats
-	if info, err := host.Info(); err == nil {
-		systemInfo.Uptime = info.Uptime
-		// systemInfo.Os = info.OS
-	}
-	// add cpu stats
-	if info, err := cpu.Info(); err == nil {
-		systemInfo.CpuModel = info[0].ModelName
-	}
-	if cores, err := cpu.Counts(false); err == nil {
-		systemInfo.Cores = cores
-	}
-	if threads, err := cpu.Counts(true); err == nil {
-		systemInfo.Threads = threads
-	}
-
-	return systemInfo, systemStats
-
-}
-
-func getDockerStats() ([]*ContainerStats, error) {
-	resp, err := client.Get("http://localhost/containers/json")
-	if err != nil {
-		return []*ContainerStats{}, err
-	}
-	defer resp.Body.Close()
-
-	var containers []*Container
-	if err := json.NewDecoder(resp.Body).Decode(&containers); err != nil {
-		panic(err)
-	}
-
-	containerStats := make([]*ContainerStats, 0, len(containers))
-
-	// store valid ids to clean up old container ids from map
-	validIds := make(map[string]struct{}, len(containers))
-
-	var wg sync.WaitGroup
-
-	for _, ctr := range containers {
-		ctr.IdShort = ctr.ID[:12]
-		validIds[ctr.IdShort] = struct{}{}
-		wg.Add(1)
-		go func() {
-			defer wg.Done()
-			cstats, err := getContainerStats(ctr)
-			if err != nil {
-				// retry once
-				cstats, err = getContainerStats(ctr)
-				if err != nil {
-					log.Printf("Error getting container stats: %+v\n", err)
-					return
-				}
-			}
-			containerStats = append(containerStats, cstats)
-		}()
-	}
-
-	wg.Wait()
-
-	for id := range containerCpuMap {
-		if _, exists := validIds[id]; !exists {
-			// log.Printf("Removing container cpu map entry: %+v\n", id)
-			delete(containerCpuMap, id)
-		}
-	}
-
-	return containerStats, nil
-}
-
-func getContainerStats(ctr *Container) (*ContainerStats, error) {
-	// use semaphore to limit concurrency
-	acquireSemaphore()
-	defer releaseSemaphore()
-	resp, err := client.Get("http://localhost/containers/" + ctr.IdShort + "/stats?stream=0&one-shot=1")
-	if err != nil {
-		return &ContainerStats{}, err
-	}
-	defer resp.Body.Close()
-
-	var statsJson CStats
-	if err := json.NewDecoder(resp.Body).Decode(&statsJson); err != nil {
-		panic(err)
-	}
-
-	name := ctr.Names[0][1:]
-
-	// memory (https://docs.docker.com/reference/cli/docker/container/stats/)
-	memCache := statsJson.MemoryStats.Stats["inactive_file"]
-	if memCache == 0 {
-		memCache = statsJson.MemoryStats.Stats["cache"]
-	}
-	usedMemory := statsJson.MemoryStats.Usage - memCache
-	// pctMemory := float64(usedMemory) / float64(statsJson.MemoryStats.Limit) * 100
-
-	// cpu
-	// add default values to containerCpu if it doesn't exist
-	containerCpuMutex.Lock()
-	defer containerCpuMutex.Unlock()
-	if _, ok := containerCpuMap[ctr.IdShort]; !ok {
-		containerCpuMap[ctr.IdShort] = [2]uint64{0, 0}
-	}
-	cpuDelta := statsJson.CPUStats.CPUUsage.TotalUsage - containerCpuMap[ctr.IdShort][0]
-	systemDelta := statsJson.CPUStats.SystemUsage - containerCpuMap[ctr.IdShort][1]
-	cpuPct := float64(cpuDelta) / float64(systemDelta) * 100
-	if cpuPct > 100 {
-		return &ContainerStats{}, fmt.Errorf("%s cpu pct greater than 100: %+v", name, cpuPct)
-	}
-	containerCpuMap[ctr.IdShort] = [2]uint64{statsJson.CPUStats.CPUUsage.TotalUsage, statsJson.CPUStats.SystemUsage}
-
-	cStats := &ContainerStats{
-		Name: name,
-		Cpu:  twoDecimals(cpuPct),
-		Mem:  bytesToMegabytes(float64(usedMemory)),
-		// MemPct: twoDecimals(pctMemory),
-	}
-	return cStats, nil
-}
-
-func gatherStats() *SystemData {
-	systemInfo, systemStats := getSystemStats()
-	stats := &SystemData{
-		Stats:      systemStats,
-		Info:       systemInfo,
-		Containers: []*ContainerStats{},
-	}
-	containerStats, err := getDockerStats()
-	if err == nil {
-		stats.Containers = containerStats
-	}
-	// fmt.Printf("%+v\n", stats)
-	return stats
-}
-
-func startServer(port string, pubKey []byte) {
-	sshServer.Handle(func(s sshServer.Session) {
-		stats := gatherStats()
-		var jsonStats []byte
-		jsonStats, _ = json.Marshal(stats)
-		io.WriteString(s, string(jsonStats))
-		s.Exit(0)
-	})
-
-	log.Printf("Starting SSH server on port %s", port)
-	if err := sshServer.ListenAndServe(":"+port, nil, sshServer.NoPty(),
-		sshServer.PublicKeyAuth(func(ctx sshServer.Context, key sshServer.PublicKey) bool {
-			data := []byte(pubKey)
-			allowed, _, _, _, _ := sshServer.ParseAuthorizedKey(data)
-			return sshServer.KeysEqual(key, allowed)
-		}),
-	); err != nil {
-		log.Fatal(err)
-	}
-}
-
-func main() {
-	// handle flags / subcommands
-	if len(os.Args) > 1 {
-		switch os.Args[1] {
-		case "-v":
-			fmt.Println("beszel-agent", Version)
-		case "update":
-			updateBeszel()
-		}
-		os.Exit(0)
-	}
-
-	var pubKey []byte
-	if pubKeyEnv, exists := os.LookupEnv("KEY"); exists {
-		pubKey = []byte(pubKeyEnv)
-	} else {
-		log.Fatal("KEY environment variable is not set")
-	}
-
-	if filesystem, exists := os.LookupEnv("FILESYSTEM"); exists {
-		diskIoStats.Filesystem = filesystem
-	} else {
-		diskIoStats.Filesystem = findDefaultFilesystem()
-	}
-
-	initializeDiskIoStats()
-	initializeNetIoStats()
-
-	if port, exists := os.LookupEnv("PORT"); exists {
-		startServer(port, pubKey)
-	} else {
-		startServer("45876", pubKey)
-	}
-}
-
-func bytesToMegabytes(b float64) float64 {
-	return twoDecimals(b / 1048576)
-}
-
-func bytesToGigabytes(b uint64) float64 {
-	return twoDecimals(float64(b) / 1073741824)
-}
-
-func twoDecimals(value float64) float64 {
-	return math.Round(value*100) / 100
-}
-
-func findDefaultFilesystem() string {
-	if partitions, err := disk.Partitions(false); err == nil {
-		for _, v := range partitions {
-			if v.Mountpoint == "/" {
-				log.Printf("Using filesystem: %+v\n", v.Device)
-				return v.Device
-			}
-		}
-	}
-	return ""
-}
-
-func skipNetworkInterface(name string) bool {
-	return strings.HasPrefix(name, "lo") || strings.HasPrefix(name, "docker") || strings.HasPrefix(name, "br-") || strings.HasPrefix(name, "veth")
-}
-
-func initializeDiskIoStats() {
-	if io, err := disk.IOCounters(diskIoStats.Filesystem); err == nil {
-		for _, d := range io {
-			diskIoStats.Time = time.Now()
-			diskIoStats.Read = d.ReadBytes
-			diskIoStats.Write = d.WriteBytes
-		}
-	}
-}
-
-func initializeNetIoStats() {
-	if netIO, err := psutilNet.IOCounters(true); err == nil {
-		bytesSent := uint64(0)
-		bytesRecv := uint64(0)
-		for _, v := range netIO {
-			if skipNetworkInterface(v.Name) {
-				continue
-			}
-			log.Printf("Found network interface: %+v (%+v recv, %+v sent)\n", v.Name, v.BytesRecv, v.BytesSent)
-			bytesSent += v.BytesSent
-			bytesRecv += v.BytesRecv
-		}
-		netIoStats.BytesSent = bytesSent
-		netIoStats.BytesRecv = bytesRecv
-		netIoStats.Time = time.Now()
-	}
-}

agent/network.go

@@ -0,0 +1,259 @@
+package agent
+
+import (
+	"fmt"
+	"log/slog"
+	"path"
+	"strings"
+	"time"
+
+	"github.com/henrygd/beszel/agent/deltatracker"
+	"github.com/henrygd/beszel/internal/entities/system"
+	psutilNet "github.com/shirou/gopsutil/v4/net"
+)
+
+// NicConfig controls inclusion/exclusion of network interfaces via the NICS env var
+//
+// Behavior mirrors SensorConfig's matching logic:
+// - Leading '-' means blacklist mode; otherwise whitelist mode
+// - Supports '*' wildcards using path.Match
+// - In whitelist mode with an empty list, no NICs are selected
+// - In blacklist mode with an empty list, all NICs are selected
+type NicConfig struct {
+	nics         map[string]struct{}
+	isBlacklist  bool
+	hasWildcards bool
+}
+
+func newNicConfig(nicsEnvVal string) *NicConfig {
+	cfg := &NicConfig{
+		nics: make(map[string]struct{}),
+	}
+	if strings.HasPrefix(nicsEnvVal, "-") {
+		cfg.isBlacklist = true
+		nicsEnvVal = nicsEnvVal[1:]
+	}
+	for nic := range strings.SplitSeq(nicsEnvVal, ",") {
+		nic = strings.TrimSpace(nic)
+		if nic != "" {
+			cfg.nics[nic] = struct{}{}
+			if strings.Contains(nic, "*") {
+				cfg.hasWildcards = true
+			}
+		}
+	}
+	return cfg
+}
+
+// isValidNic determines if a NIC should be included based on NicConfig rules
+func isValidNic(nicName string, cfg *NicConfig) bool {
+	// Empty list behavior differs by mode: blacklist: allow all; whitelist: allow none
+	if len(cfg.nics) == 0 {
+		return cfg.isBlacklist
+	}
+
+	// Exact match: return true if whitelist, false if blacklist
+	if _, exactMatch := cfg.nics[nicName]; exactMatch {
+		return !cfg.isBlacklist
+	}
+
+	// If no wildcards, return true if blacklist, false if whitelist
+	if !cfg.hasWildcards {
+		return cfg.isBlacklist
+	}
+
+	// Check for wildcard patterns
+	for pattern := range cfg.nics {
+		if !strings.Contains(pattern, "*") {
+			continue
+		}
+		if match, _ := path.Match(pattern, nicName); match {
+			return !cfg.isBlacklist
+		}
+	}
+
+	return cfg.isBlacklist
+}
+
+func (a *Agent) updateNetworkStats(cacheTimeMs uint16, systemStats *system.Stats) {
+	// network stats
+	a.ensureNetInterfacesInitialized()
+
+	a.ensureNetworkInterfacesMap(systemStats)
+
+	if netIO, err := psutilNet.IOCounters(true); err == nil {
+		nis, msElapsed := a.loadAndTickNetBaseline(cacheTimeMs)
+		totalBytesSent, totalBytesRecv := a.sumAndTrackPerNicDeltas(cacheTimeMs, msElapsed, netIO, systemStats)
+		bytesSentPerSecond, bytesRecvPerSecond := a.computeBytesPerSecond(msElapsed, totalBytesSent, totalBytesRecv, nis)
+		a.applyNetworkTotals(cacheTimeMs, netIO, systemStats, nis, totalBytesSent, totalBytesRecv, bytesSentPerSecond, bytesRecvPerSecond)
+	}
+}
+
+func (a *Agent) initializeNetIoStats() {
+	// reset valid network interfaces
+	a.netInterfaces = make(map[string]struct{}, 0)
+
+	// parse NICS env var for whitelist / blacklist
+	nicsEnvVal, nicsEnvExists := GetEnv("NICS")
+	var nicCfg *NicConfig
+	if nicsEnvExists {
+		nicCfg = newNicConfig(nicsEnvVal)
+	}
+
+	// get current network I/O stats and record valid interfaces
+	if netIO, err := psutilNet.IOCounters(true); err == nil {
+		for _, v := range netIO {
+			if nicsEnvExists && !isValidNic(v.Name, nicCfg) {
+				continue
+			}
+			if a.skipNetworkInterface(v) {
+				continue
+			}
+			slog.Info("Detected network interface", "name", v.Name, "sent", v.BytesSent, "recv", v.BytesRecv)
+			// store as a valid network interface
+			a.netInterfaces[v.Name] = struct{}{}
+		}
+	}
+
+	// Reset per-cache-time trackers and baselines so they will reinitialize on next use
+	a.netInterfaceDeltaTrackers = make(map[uint16]*deltatracker.DeltaTracker[string, uint64])
+	a.netIoStats = make(map[uint16]system.NetIoStats)
+}
+
+// ensureNetInterfacesInitialized re-initializes NICs if none are currently tracked
+func (a *Agent) ensureNetInterfacesInitialized() {
+	if len(a.netInterfaces) == 0 {
+		// if no network interfaces, initialize again
+		// this is a fix if agent started before network is online (#466)
+		// maybe refactor this in the future to not cache interface names at all so we
+		// don't miss an interface that's been added after agent started in any circumstance
+		a.initializeNetIoStats()
+	}
+}
+
+// ensureNetworkInterfacesMap ensures systemStats.NetworkInterfaces map exists
+func (a *Agent) ensureNetworkInterfacesMap(systemStats *system.Stats) {
+	if systemStats.NetworkInterfaces == nil {
+		systemStats.NetworkInterfaces = make(map[string][4]uint64, 0)
+	}
+}
+
+// loadAndTickNetBaseline returns the NetIoStats baseline and milliseconds elapsed, updating time
+func (a *Agent) loadAndTickNetBaseline(cacheTimeMs uint16) (netIoStat system.NetIoStats, msElapsed uint64) {
+	netIoStat = a.netIoStats[cacheTimeMs]
+	if netIoStat.Time.IsZero() {
+		netIoStat.Time = time.Now()
+		msElapsed = 0
+	} else {
+		msElapsed = uint64(time.Since(netIoStat.Time).Milliseconds())
+		netIoStat.Time = time.Now()
+	}
+	return netIoStat, msElapsed
+}
+
+// sumAndTrackPerNicDeltas accumulates totals and records per-NIC up/down deltas into systemStats
+func (a *Agent) sumAndTrackPerNicDeltas(cacheTimeMs uint16, msElapsed uint64, netIO []psutilNet.IOCountersStat, systemStats *system.Stats) (totalBytesSent, totalBytesRecv uint64) {
+	tracker := a.netInterfaceDeltaTrackers[cacheTimeMs]
+	if tracker == nil {
+		tracker = deltatracker.NewDeltaTracker[string, uint64]()
+		a.netInterfaceDeltaTrackers[cacheTimeMs] = tracker
+	}
+	tracker.Cycle()
+
+	for _, v := range netIO {
+		if _, exists := a.netInterfaces[v.Name]; !exists {
+			continue
+		}
+		totalBytesSent += v.BytesSent
+		totalBytesRecv += v.BytesRecv
+
+		var upDelta, downDelta uint64
+		upKey, downKey := fmt.Sprintf("%sup", v.Name), fmt.Sprintf("%sdown", v.Name)
+		tracker.Set(upKey, v.BytesSent)
+		tracker.Set(downKey, v.BytesRecv)
+		if msElapsed > 0 {
+			if prevVal, ok := tracker.Previous(upKey); ok {
+				var deltaBytes uint64
+				if v.BytesSent >= prevVal {
+					deltaBytes = v.BytesSent - prevVal
+				} else {
+					deltaBytes = v.BytesSent
+				}
+				upDelta = deltaBytes * 1000 / msElapsed
+			}
+			if prevVal, ok := tracker.Previous(downKey); ok {
+				var deltaBytes uint64
+				if v.BytesRecv >= prevVal {
+					deltaBytes = v.BytesRecv - prevVal
+				} else {
+					deltaBytes = v.BytesRecv
+				}
+				downDelta = deltaBytes * 1000 / msElapsed
+			}
+		}
+		systemStats.NetworkInterfaces[v.Name] = [4]uint64{upDelta, downDelta, v.BytesSent, v.BytesRecv}
+	}
+
+	return totalBytesSent, totalBytesRecv
+}
+
+// computeBytesPerSecond calculates per-second totals from elapsed time and totals
+func (a *Agent) computeBytesPerSecond(msElapsed, totalBytesSent, totalBytesRecv uint64, nis system.NetIoStats) (bytesSentPerSecond, bytesRecvPerSecond uint64) {
+	if msElapsed > 0 {
+		bytesSentPerSecond = (totalBytesSent - nis.BytesSent) * 1000 / msElapsed
+		bytesRecvPerSecond = (totalBytesRecv - nis.BytesRecv) * 1000 / msElapsed
+	}
+	return bytesSentPerSecond, bytesRecvPerSecond
+}
+
+// applyNetworkTotals validates and writes computed network stats, or resets on anomaly
+func (a *Agent) applyNetworkTotals(
+	cacheTimeMs uint16,
+	netIO []psutilNet.IOCountersStat,
+	systemStats *system.Stats,
+	nis system.NetIoStats,
+	totalBytesSent, totalBytesRecv uint64,
+	bytesSentPerSecond, bytesRecvPerSecond uint64,
+) {
+	networkSentPs := bytesToMegabytes(float64(bytesSentPerSecond))
+	networkRecvPs := bytesToMegabytes(float64(bytesRecvPerSecond))
+	if networkSentPs > 10_000 || networkRecvPs > 10_000 {
+		slog.Warn("Invalid net stats. Resetting.", "sent", networkSentPs, "recv", networkRecvPs)
+		for _, v := range netIO {
+			if _, exists := a.netInterfaces[v.Name]; !exists {
+				continue
+			}
+			slog.Info(v.Name, "recv", v.BytesRecv, "sent", v.BytesSent)
+		}
+		a.initializeNetIoStats()
+		delete(a.netIoStats, cacheTimeMs)
+		delete(a.netInterfaceDeltaTrackers, cacheTimeMs)
+		systemStats.NetworkSent = 0
+		systemStats.NetworkRecv = 0
+		systemStats.Bandwidth[0], systemStats.Bandwidth[1] = 0, 0
+		return
+	}
+
+	systemStats.NetworkSent = networkSentPs
+	systemStats.NetworkRecv = networkRecvPs
+	systemStats.Bandwidth[0], systemStats.Bandwidth[1] = bytesSentPerSecond, bytesRecvPerSecond
+	nis.BytesSent = totalBytesSent
+	nis.BytesRecv = totalBytesRecv
+	a.netIoStats[cacheTimeMs] = nis
+}
+
+func (a *Agent) skipNetworkInterface(v psutilNet.IOCountersStat) bool {
+	switch {
+	case strings.HasPrefix(v.Name, "lo"),
+		strings.HasPrefix(v.Name, "docker"),
+		strings.HasPrefix(v.Name, "br-"),
+		strings.HasPrefix(v.Name, "veth"),
+		strings.HasPrefix(v.Name, "bond"),
+		strings.HasPrefix(v.Name, "cali"),
+		v.BytesRecv == 0,
+		v.BytesSent == 0:
+		return true
+	default:
+		return false
+	}
+}

agent/network_test.go

@@ -0,0 +1,502 @@
+//go:build testing
+
+package agent
+
+import (
+	"testing"
+	"time"
+
+	"github.com/henrygd/beszel/agent/deltatracker"
+	"github.com/henrygd/beszel/internal/entities/system"
+	psutilNet "github.com/shirou/gopsutil/v4/net"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsValidNic(t *testing.T) {
+	tests := []struct {
+		name          string
+		nicName       string
+		config        *NicConfig
+		expectedValid bool
+	}{
+		{
+			name:    "Whitelist - NIC in list",
+			nicName: "eth0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{"eth0": {}},
+				isBlacklist: false,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Whitelist - NIC not in list",
+			nicName: "wlan0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{"eth0": {}},
+				isBlacklist: false,
+			},
+			expectedValid: false,
+		},
+		{
+			name:    "Blacklist - NIC in list",
+			nicName: "eth0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{"eth0": {}},
+				isBlacklist: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:    "Blacklist - NIC not in list",
+			nicName: "wlan0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{"eth0": {}},
+				isBlacklist: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Whitelist with wildcard - matching pattern",
+			nicName: "eth1",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Whitelist with wildcard - non-matching pattern",
+			nicName: "wlan0",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:    "Blacklist with wildcard - matching pattern",
+			nicName: "eth1",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:    "Blacklist with wildcard - non-matching pattern",
+			nicName: "wlan0",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Empty whitelist config - no NICs allowed",
+			nicName: "eth0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{},
+				isBlacklist: false,
+			},
+			expectedValid: false,
+		},
+		{
+			name:    "Empty blacklist config - all NICs allowed",
+			nicName: "eth0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{},
+				isBlacklist: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Multiple patterns - exact match",
+			nicName: "eth0",
+			config: &NicConfig{
+				nics:        map[string]struct{}{"eth0": {}, "wlan*": {}},
+				isBlacklist: false,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Multiple patterns - wildcard match",
+			nicName: "wlan1",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "wlan*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:    "Multiple patterns - no match",
+			nicName: "bond0",
+			config: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "wlan*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := isValidNic(tt.nicName, tt.config)
+			assert.Equal(t, tt.expectedValid, result)
+		})
+	}
+}
+
+func TestNewNicConfig(t *testing.T) {
+	tests := []struct {
+		name        string
+		nicsEnvVal  string
+		expectedCfg *NicConfig
+	}{
+		{
+			name:       "Empty string",
+			nicsEnvVal: "",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "Single NIC whitelist",
+			nicsEnvVal: "eth0",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "Multiple NICs whitelist",
+			nicsEnvVal: "eth0,wlan0",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "wlan0": {}},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "Blacklist mode",
+			nicsEnvVal: "-eth0,wlan0",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "wlan0": {}},
+				isBlacklist:  true,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "With wildcards",
+			nicsEnvVal: "eth*,wlan0",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}, "wlan0": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+		},
+		{
+			name:       "Blacklist with wildcards",
+			nicsEnvVal: "-eth*,wlan0",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}, "wlan0": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+		},
+		{
+			name:       "With whitespace",
+			nicsEnvVal: "eth0, wlan0 , eth1",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "wlan0": {}, "eth1": {}},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "Only wildcards",
+			nicsEnvVal: "eth*,wlan*",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth*": {}, "wlan*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+		},
+		{
+			name:       "Leading dash only",
+			nicsEnvVal: "-",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{},
+				isBlacklist:  true,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:       "Mixed exact and wildcard",
+			nicsEnvVal: "eth0,br-*",
+			expectedCfg: &NicConfig{
+				nics:         map[string]struct{}{"eth0": {}, "br-*": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			cfg := newNicConfig(tt.nicsEnvVal)
+			require.NotNil(t, cfg)
+			assert.Equal(t, tt.expectedCfg.isBlacklist, cfg.isBlacklist)
+			assert.Equal(t, tt.expectedCfg.hasWildcards, cfg.hasWildcards)
+			assert.Equal(t, tt.expectedCfg.nics, cfg.nics)
+		})
+	}
+}
+func TestEnsureNetworkInterfacesMap(t *testing.T) {
+	var a Agent
+	var stats system.Stats
+
+	// Initially nil
+	assert.Nil(t, stats.NetworkInterfaces)
+	// Ensure map is created
+	a.ensureNetworkInterfacesMap(&stats)
+	assert.NotNil(t, stats.NetworkInterfaces)
+	// Idempotent
+	a.ensureNetworkInterfacesMap(&stats)
+	assert.NotNil(t, stats.NetworkInterfaces)
+}
+
+func TestLoadAndTickNetBaseline(t *testing.T) {
+	a := &Agent{netIoStats: make(map[uint16]system.NetIoStats)}
+
+	// First call initializes time and returns 0 elapsed
+	ni, elapsed := a.loadAndTickNetBaseline(100)
+	assert.Equal(t, uint64(0), elapsed)
+	assert.False(t, ni.Time.IsZero())
+
+	// Store back what loadAndTick returns to mimic updateNetworkStats behavior
+	a.netIoStats[100] = ni
+
+	time.Sleep(2 * time.Millisecond)
+
+	// Next call should produce >= 0 elapsed and update time
+	ni2, elapsed2 := a.loadAndTickNetBaseline(100)
+	assert.True(t, elapsed2 > 0)
+	assert.False(t, ni2.Time.IsZero())
+}
+
+func TestComputeBytesPerSecond(t *testing.T) {
+	a := &Agent{}
+
+	// No elapsed -> zero rate
+	bytesUp, bytesDown := a.computeBytesPerSecond(0, 2000, 3000, system.NetIoStats{BytesSent: 1000, BytesRecv: 1000})
+	assert.Equal(t, uint64(0), bytesUp)
+	assert.Equal(t, uint64(0), bytesDown)
+
+	// With elapsed -> per-second calculation
+	bytesUp, bytesDown = a.computeBytesPerSecond(500, 6000, 11000, system.NetIoStats{BytesSent: 1000, BytesRecv: 1000})
+	// (6000-1000)*1000/500 = 10000; (11000-1000)*1000/500 = 20000
+	assert.Equal(t, uint64(10000), bytesUp)
+	assert.Equal(t, uint64(20000), bytesDown)
+}
+
+func TestSumAndTrackPerNicDeltas(t *testing.T) {
+	a := &Agent{
+		netInterfaces:             map[string]struct{}{"eth0": {}, "wlan0": {}},
+		netInterfaceDeltaTrackers: make(map[uint16]*deltatracker.DeltaTracker[string, uint64]),
+	}
+
+	// Two samples for same cache interval to verify delta behavior
+	cache := uint16(42)
+	net1 := []psutilNet.IOCountersStat{{Name: "eth0", BytesSent: 1000, BytesRecv: 2000}}
+	stats1 := &system.Stats{}
+	a.ensureNetworkInterfacesMap(stats1)
+	tx1, rx1 := a.sumAndTrackPerNicDeltas(cache, 0, net1, stats1)
+	assert.Equal(t, uint64(1000), tx1)
+	assert.Equal(t, uint64(2000), rx1)
+
+	// Second cycle with elapsed, larger counters -> deltas computed inside
+	net2 := []psutilNet.IOCountersStat{{Name: "eth0", BytesSent: 4000, BytesRecv: 9000}}
+	stats := &system.Stats{}
+	a.ensureNetworkInterfacesMap(stats)
+	tx2, rx2 := a.sumAndTrackPerNicDeltas(cache, 1000, net2, stats)
+	assert.Equal(t, uint64(4000), tx2)
+	assert.Equal(t, uint64(9000), rx2)
+	// Up/Down deltas per second should be (4000-1000)/1s = 3000 and (9000-2000)/1s = 7000
+	ni, ok := stats.NetworkInterfaces["eth0"]
+	assert.True(t, ok)
+	assert.Equal(t, uint64(3000), ni[0])
+	assert.Equal(t, uint64(7000), ni[1])
+}
+
+func TestSumAndTrackPerNicDeltasHandlesCounterReset(t *testing.T) {
+	a := &Agent{
+		netInterfaces:             map[string]struct{}{"eth0": {}},
+		netInterfaceDeltaTrackers: make(map[uint16]*deltatracker.DeltaTracker[string, uint64]),
+	}
+
+	cache := uint16(77)
+
+	// First interval establishes baseline values
+	initial := []psutilNet.IOCountersStat{{Name: "eth0", BytesSent: 4_000, BytesRecv: 6_000}}
+	statsInitial := &system.Stats{}
+	a.ensureNetworkInterfacesMap(statsInitial)
+	_, _ = a.sumAndTrackPerNicDeltas(cache, 0, initial, statsInitial)
+
+	// Second interval increments counters normally so previous snapshot gets populated
+	increment := []psutilNet.IOCountersStat{{Name: "eth0", BytesSent: 9_000, BytesRecv: 11_000}}
+	statsIncrement := &system.Stats{}
+	a.ensureNetworkInterfacesMap(statsIncrement)
+	_, _ = a.sumAndTrackPerNicDeltas(cache, 1_000, increment, statsIncrement)
+
+	niIncrement, ok := statsIncrement.NetworkInterfaces["eth0"]
+	require.True(t, ok)
+	assert.Equal(t, uint64(5_000), niIncrement[0])
+	assert.Equal(t, uint64(5_000), niIncrement[1])
+
+	// Third interval simulates counter reset (values drop below previous totals)
+	reset := []psutilNet.IOCountersStat{{Name: "eth0", BytesSent: 1_200, BytesRecv: 1_500}}
+	statsReset := &system.Stats{}
+	a.ensureNetworkInterfacesMap(statsReset)
+	_, _ = a.sumAndTrackPerNicDeltas(cache, 1_000, reset, statsReset)
+
+	niReset, ok := statsReset.NetworkInterfaces["eth0"]
+	require.True(t, ok)
+	assert.Equal(t, uint64(1_200), niReset[0], "upload delta should match new counter value after reset")
+	assert.Equal(t, uint64(1_500), niReset[1], "download delta should match new counter value after reset")
+}
+
+func TestApplyNetworkTotals(t *testing.T) {
+	tests := []struct {
+		name                  string
+		bytesSentPerSecond    uint64
+		bytesRecvPerSecond    uint64
+		totalBytesSent        uint64
+		totalBytesRecv        uint64
+		expectReset           bool
+		expectedNetworkSent   float64
+		expectedNetworkRecv   float64
+		expectedBandwidthSent uint64
+		expectedBandwidthRecv uint64
+	}{
+		{
+			name:                  "Valid network stats - normal values",
+			bytesSentPerSecond:    1000000, // 1 MB/s
+			bytesRecvPerSecond:    2000000, // 2 MB/s
+			totalBytesSent:        10000000,
+			totalBytesRecv:        20000000,
+			expectReset:           false,
+			expectedNetworkSent:   0.95, // ~1 MB/s rounded to 2 decimals
+			expectedNetworkRecv:   1.91, // ~2 MB/s rounded to 2 decimals
+			expectedBandwidthSent: 1000000,
+			expectedBandwidthRecv: 2000000,
+		},
+		{
+			name:               "Invalid network stats - sent exceeds threshold",
+			bytesSentPerSecond: 11000000000, // ~10.5 GB/s > 10 GB/s threshold
+			bytesRecvPerSecond: 1000000,     // 1 MB/s
+			totalBytesSent:     10000000,
+			totalBytesRecv:     20000000,
+			expectReset:        true,
+		},
+		{
+			name:               "Invalid network stats - recv exceeds threshold",
+			bytesSentPerSecond: 1000000,     // 1 MB/s
+			bytesRecvPerSecond: 11000000000, // ~10.5 GB/s > 10 GB/s threshold
+			totalBytesSent:     10000000,
+			totalBytesRecv:     20000000,
+			expectReset:        true,
+		},
+		{
+			name:               "Invalid network stats - both exceed threshold",
+			bytesSentPerSecond: 12000000000, // ~11.4 GB/s
+			bytesRecvPerSecond: 13000000000, // ~12.4 GB/s
+			totalBytesSent:     10000000,
+			totalBytesRecv:     20000000,
+			expectReset:        true,
+		},
+		{
+			name:                  "Valid network stats - at threshold boundary",
+			bytesSentPerSecond:    10485750000, // ~9999.99 MB/s (rounds to 9999.99)
+			bytesRecvPerSecond:    10485750000, // ~9999.99 MB/s (rounds to 9999.99)
+			totalBytesSent:        10000000,
+			totalBytesRecv:        20000000,
+			expectReset:           false,
+			expectedNetworkSent:   9999.99,
+			expectedNetworkRecv:   9999.99,
+			expectedBandwidthSent: 10485750000,
+			expectedBandwidthRecv: 10485750000,
+		},
+		{
+			name:                  "Zero values",
+			bytesSentPerSecond:    0,
+			bytesRecvPerSecond:    0,
+			totalBytesSent:        0,
+			totalBytesRecv:        0,
+			expectReset:           false,
+			expectedNetworkSent:   0.0,
+			expectedNetworkRecv:   0.0,
+			expectedBandwidthSent: 0,
+			expectedBandwidthRecv: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Setup agent with initialized maps
+			a := &Agent{
+				netInterfaces:             make(map[string]struct{}),
+				netIoStats:                make(map[uint16]system.NetIoStats),
+				netInterfaceDeltaTrackers: make(map[uint16]*deltatracker.DeltaTracker[string, uint64]),
+			}
+
+			cacheTimeMs := uint16(100)
+			netIO := []psutilNet.IOCountersStat{
+				{Name: "eth0", BytesSent: 1000, BytesRecv: 2000},
+			}
+			systemStats := &system.Stats{}
+			nis := system.NetIoStats{}
+
+			a.applyNetworkTotals(
+				cacheTimeMs,
+				netIO,
+				systemStats,
+				nis,
+				tt.totalBytesSent,
+				tt.totalBytesRecv,
+				tt.bytesSentPerSecond,
+				tt.bytesRecvPerSecond,
+			)
+
+			if tt.expectReset {
+				// Should have reset network tracking state - maps cleared and stats zeroed
+				assert.NotContains(t, a.netIoStats, cacheTimeMs, "cache entry should be cleared after reset")
+				assert.NotContains(t, a.netInterfaceDeltaTrackers, cacheTimeMs, "tracker should be cleared on reset")
+				assert.Zero(t, systemStats.NetworkSent)
+				assert.Zero(t, systemStats.NetworkRecv)
+				assert.Zero(t, systemStats.Bandwidth[0])
+				assert.Zero(t, systemStats.Bandwidth[1])
+			} else {
+				// Should have applied stats
+				assert.Equal(t, tt.expectedNetworkSent, systemStats.NetworkSent)
+				assert.Equal(t, tt.expectedNetworkRecv, systemStats.NetworkRecv)
+				assert.Equal(t, tt.expectedBandwidthSent, systemStats.Bandwidth[0])
+				assert.Equal(t, tt.expectedBandwidthRecv, systemStats.Bandwidth[1])
+
+				// Should have updated NetIoStats
+				updatedNis := a.netIoStats[cacheTimeMs]
+				assert.Equal(t, tt.totalBytesSent, updatedNis.BytesSent)
+				assert.Equal(t, tt.totalBytesRecv, updatedNis.BytesRecv)
+			}
+		})
+	}
+}

agent/sensors.go

@@ -0,0 +1,198 @@
+package agent
+
+import (
+	"context"
+	"fmt"
+	"log/slog"
+	"path"
+	"runtime"
+	"strconv"
+	"strings"
+	"unicode/utf8"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/shirou/gopsutil/v4/common"
+	"github.com/shirou/gopsutil/v4/sensors"
+)
+
+type SensorConfig struct {
+	context        context.Context
+	sensors        map[string]struct{}
+	primarySensor  string
+	isBlacklist    bool
+	hasWildcards   bool
+	skipCollection bool
+}
+
+func (a *Agent) newSensorConfig() *SensorConfig {
+	primarySensor, _ := GetEnv("PRIMARY_SENSOR")
+	sysSensors, _ := GetEnv("SYS_SENSORS")
+	sensorsEnvVal, sensorsSet := GetEnv("SENSORS")
+	skipCollection := sensorsSet && sensorsEnvVal == ""
+
+	return a.newSensorConfigWithEnv(primarySensor, sysSensors, sensorsEnvVal, skipCollection)
+}
+
+// Matches sensors.TemperaturesWithContext to allow for panic recovery (gopsutil/issues/1832)
+type getTempsFn func(ctx context.Context) ([]sensors.TemperatureStat, error)
+
+// newSensorConfigWithEnv creates a SensorConfig with the provided environment variables
+// sensorsSet indicates if the SENSORS environment variable was explicitly set (even to empty string)
+func (a *Agent) newSensorConfigWithEnv(primarySensor, sysSensors, sensorsEnvVal string, skipCollection bool) *SensorConfig {
+	config := &SensorConfig{
+		context:        context.Background(),
+		primarySensor:  primarySensor,
+		skipCollection: skipCollection,
+		sensors:        make(map[string]struct{}),
+	}
+
+	// Set sensors context (allows overriding sys location for sensors)
+	if sysSensors != "" {
+		slog.Info("SYS_SENSORS", "path", sysSensors)
+		config.context = context.WithValue(config.context,
+			common.EnvKey, common.EnvMap{common.HostSysEnvKey: sysSensors},
+		)
+	}
+
+	// handle blacklist
+	if strings.HasPrefix(sensorsEnvVal, "-") {
+		config.isBlacklist = true
+		sensorsEnvVal = sensorsEnvVal[1:]
+	}
+
+	for sensor := range strings.SplitSeq(sensorsEnvVal, ",") {
+		sensor = strings.TrimSpace(sensor)
+		if sensor != "" {
+			config.sensors[sensor] = struct{}{}
+			if strings.Contains(sensor, "*") {
+				config.hasWildcards = true
+			}
+		}
+	}
+
+	return config
+}
+
+// updateTemperatures updates the agent with the latest sensor temperatures
+func (a *Agent) updateTemperatures(systemStats *system.Stats) {
+	// skip if sensors whitelist is set to empty string
+	if a.sensorConfig.skipCollection {
+		slog.Debug("Skipping temperature collection")
+		return
+	}
+
+	// reset high temp
+	a.systemInfo.DashboardTemp = 0
+
+	temps, err := a.getTempsWithPanicRecovery(getSensorTemps)
+	if err != nil {
+		// retry once on panic (gopsutil/issues/1832)
+		temps, err = a.getTempsWithPanicRecovery(getSensorTemps)
+		if err != nil {
+			slog.Warn("Error updating temperatures", "err", err)
+			if len(systemStats.Temperatures) > 0 {
+				systemStats.Temperatures = make(map[string]float64)
+			}
+			return
+		}
+	}
+	slog.Debug("Temperature", "sensors", temps)
+
+	// return if no sensors
+	if len(temps) == 0 {
+		return
+	}
+
+	systemStats.Temperatures = make(map[string]float64, len(temps))
+	for i, sensor := range temps {
+		// check for malformed strings on darwin (gopsutil/issues/1832)
+		if runtime.GOOS == "darwin" && !utf8.ValidString(sensor.SensorKey) {
+			continue
+		}
+
+		// scale temperature
+		if sensor.Temperature != 0 && sensor.Temperature < 1 {
+			sensor.Temperature = scaleTemperature(sensor.Temperature)
+		}
+		// skip if temperature is unreasonable
+		if sensor.Temperature <= 0 || sensor.Temperature >= 200 {
+			continue
+		}
+		sensorName := sensor.SensorKey
+		if _, ok := systemStats.Temperatures[sensorName]; ok {
+			// if key already exists, append int to key
+			sensorName = sensorName + "_" + strconv.Itoa(i)
+		}
+		// skip if not in whitelist or blacklist
+		if !isValidSensor(sensorName, a.sensorConfig) {
+			continue
+		}
+		// set dashboard temperature
+		switch a.sensorConfig.primarySensor {
+		case "":
+			a.systemInfo.DashboardTemp = max(a.systemInfo.DashboardTemp, sensor.Temperature)
+		case sensorName:
+			a.systemInfo.DashboardTemp = sensor.Temperature
+		}
+		systemStats.Temperatures[sensorName] = twoDecimals(sensor.Temperature)
+	}
+}
+
+// getTempsWithPanicRecovery wraps sensors.TemperaturesWithContext to recover from panics (gopsutil/issues/1832)
+func (a *Agent) getTempsWithPanicRecovery(getTemps getTempsFn) (temps []sensors.TemperatureStat, err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("panic: %v", r)
+		}
+	}()
+	// get sensor data (error ignored intentionally as it may be only with one sensor)
+	temps, _ = getTemps(a.sensorConfig.context)
+	return
+}
+
+// isValidSensor checks if a sensor is valid based on the sensor name and the sensor config
+func isValidSensor(sensorName string, config *SensorConfig) bool {
+	// if no sensors configured, everything is valid
+	if len(config.sensors) == 0 {
+		return true
+	}
+
+	// Exact match - return true if whitelist, false if blacklist
+	if _, exactMatch := config.sensors[sensorName]; exactMatch {
+		return !config.isBlacklist
+	}
+
+	// If no wildcards, return true if blacklist, false if whitelist
+	if !config.hasWildcards {
+		return config.isBlacklist
+	}
+
+	// Check for wildcard patterns
+	for pattern := range config.sensors {
+		if !strings.Contains(pattern, "*") {
+			continue
+		}
+		if match, _ := path.Match(pattern, sensorName); match {
+			return !config.isBlacklist
+		}
+	}
+
+	return config.isBlacklist
+}
+
+// scaleTemperature scales temperatures in fractional values to reasonable Celsius values
+func scaleTemperature(temp float64) float64 {
+	if temp > 1 {
+		return temp
+	}
+	scaled100 := temp * 100
+	scaled1000 := temp * 1000
+
+	if scaled100 >= 15 && scaled100 <= 95 {
+		return scaled100
+	} else if scaled1000 >= 15 && scaled1000 <= 95 {
+		return scaled1000
+	}
+	return scaled100
+}

agent/sensors_default.go

@@ -0,0 +1,9 @@
+//go:build !windows
+
+package agent
+
+import (
+	"github.com/shirou/gopsutil/v4/sensors"
+)
+
+var getSensorTemps = sensors.TemperaturesWithContext

agent/sensors_test.go

@@ -0,0 +1,554 @@
+//go:build testing
+// +build testing
+
+package agent
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"testing"
+
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/shirou/gopsutil/v4/common"
+	"github.com/shirou/gopsutil/v4/sensors"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestIsValidSensor(t *testing.T) {
+	tests := []struct {
+		name          string
+		sensorName    string
+		config        *SensorConfig
+		expectedValid bool
+	}{
+		{
+			name:       "Whitelist - sensor in list",
+			sensorName: "cpu_temp",
+			config: &SensorConfig{
+				sensors:     map[string]struct{}{"cpu_temp": {}},
+				isBlacklist: false,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Whitelist - sensor not in list",
+			sensorName: "gpu_temp",
+			config: &SensorConfig{
+				sensors:     map[string]struct{}{"cpu_temp": {}},
+				isBlacklist: false,
+			},
+			expectedValid: false,
+		},
+		{
+			name:       "Blacklist - sensor in list",
+			sensorName: "cpu_temp",
+			config: &SensorConfig{
+				sensors:     map[string]struct{}{"cpu_temp": {}},
+				isBlacklist: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:       "Blacklist - sensor not in list",
+			sensorName: "gpu_temp",
+			config: &SensorConfig{
+				sensors:     map[string]struct{}{"cpu_temp": {}},
+				isBlacklist: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Whitelist with wildcard - matching pattern",
+			sensorName: "core_0_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"core_*_temp": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Whitelist with wildcard - non-matching pattern",
+			sensorName: "gpu_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"core_*_temp": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:       "Blacklist with wildcard - matching pattern",
+			sensorName: "core_0_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"core_*_temp": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:       "Blacklist with wildcard - non-matching pattern",
+			sensorName: "gpu_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"core_*_temp": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "No sensors configured",
+			sensorName: "any_temp",
+			config: &SensorConfig{
+				sensors:        map[string]struct{}{},
+				isBlacklist:    false,
+				hasWildcards:   false,
+				skipCollection: false,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Mixed patterns in whitelist - exact match",
+			sensorName: "cpu_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"cpu_temp": {}, "core_*_temp": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Mixed patterns in whitelist - wildcard match",
+			sensorName: "core_1_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"cpu_temp": {}, "core_*_temp": {}},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+			expectedValid: true,
+		},
+		{
+			name:       "Mixed patterns in blacklist - exact match",
+			sensorName: "cpu_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"cpu_temp": {}, "core_*_temp": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+		{
+			name:       "Mixed patterns in blacklist - wildcard match",
+			sensorName: "core_1_temp",
+			config: &SensorConfig{
+				sensors:      map[string]struct{}{"cpu_temp": {}, "core_*_temp": {}},
+				isBlacklist:  true,
+				hasWildcards: true,
+			},
+			expectedValid: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := isValidSensor(tt.sensorName, tt.config)
+			assert.Equal(t, tt.expectedValid, result, "isValidSensor(%q, config) returned unexpected result", tt.sensorName)
+		})
+	}
+}
+
+func TestNewSensorConfigWithEnv(t *testing.T) {
+	agent := &Agent{}
+
+	tests := []struct {
+		name           string
+		primarySensor  string
+		sysSensors     string
+		sensors        string
+		skipCollection bool
+		expectedConfig *SensorConfig
+	}{
+		{
+			name:          "Empty configuration",
+			primarySensor: "",
+			sysSensors:    "",
+			sensors:       "",
+			expectedConfig: &SensorConfig{
+				context:        context.Background(),
+				primarySensor:  "",
+				sensors:        map[string]struct{}{},
+				isBlacklist:    false,
+				hasWildcards:   false,
+				skipCollection: false,
+			},
+		},
+		{
+			name:           "Explicitly set to empty string",
+			primarySensor:  "",
+			sysSensors:     "",
+			sensors:        "",
+			skipCollection: true,
+			expectedConfig: &SensorConfig{
+				context:        context.Background(),
+				primarySensor:  "",
+				sensors:        map[string]struct{}{},
+				isBlacklist:    false,
+				hasWildcards:   false,
+				skipCollection: true,
+			},
+		},
+		{
+			name:          "Primary sensor only - should create sensor map",
+			primarySensor: "cpu_temp",
+			sysSensors:    "",
+			sensors:       "",
+			expectedConfig: &SensorConfig{
+				context:       context.Background(),
+				primarySensor: "cpu_temp",
+				sensors:       map[string]struct{}{},
+				isBlacklist:   false,
+				hasWildcards:  false,
+			},
+		},
+		{
+			name:          "Whitelist sensors",
+			primarySensor: "cpu_temp",
+			sysSensors:    "",
+			sensors:       "cpu_temp,gpu_temp",
+			expectedConfig: &SensorConfig{
+				context:       context.Background(),
+				primarySensor: "cpu_temp",
+				sensors: map[string]struct{}{
+					"cpu_temp": {},
+					"gpu_temp": {},
+				},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:          "Blacklist sensors",
+			primarySensor: "cpu_temp",
+			sysSensors:    "",
+			sensors:       "-cpu_temp,gpu_temp",
+			expectedConfig: &SensorConfig{
+				context:       context.Background(),
+				primarySensor: "cpu_temp",
+				sensors: map[string]struct{}{
+					"cpu_temp": {},
+					"gpu_temp": {},
+				},
+				isBlacklist:  true,
+				hasWildcards: false,
+			},
+		},
+		{
+			name:          "Sensors with wildcard",
+			primarySensor: "cpu_temp",
+			sysSensors:    "",
+			sensors:       "cpu_*,gpu_temp",
+			expectedConfig: &SensorConfig{
+				context:       context.Background(),
+				primarySensor: "cpu_temp",
+				sensors: map[string]struct{}{
+					"cpu_*":    {},
+					"gpu_temp": {},
+				},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+		},
+		{
+			name:          "Sensors with whitespace",
+			primarySensor: "cpu_temp",
+			sysSensors:    "",
+			sensors:       "cpu_*, gpu_temp",
+			expectedConfig: &SensorConfig{
+				context:       context.Background(),
+				primarySensor: "cpu_temp",
+				sensors: map[string]struct{}{
+					"cpu_*":    {},
+					"gpu_temp": {},
+				},
+				isBlacklist:  false,
+				hasWildcards: true,
+			},
+		},
+		{
+			name:          "With SYS_SENSORS path",
+			primarySensor: "cpu_temp",
+			sysSensors:    "/custom/path",
+			sensors:       "cpu_temp",
+			expectedConfig: &SensorConfig{
+				primarySensor: "cpu_temp",
+				sensors: map[string]struct{}{
+					"cpu_temp": {},
+				},
+				isBlacklist:  false,
+				hasWildcards: false,
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := agent.newSensorConfigWithEnv(tt.primarySensor, tt.sysSensors, tt.sensors, tt.skipCollection)
+
+			// Check primary sensor
+			assert.Equal(t, tt.expectedConfig.primarySensor, result.primarySensor)
+
+			// Check sensor map
+			if tt.expectedConfig.sensors == nil {
+				assert.Nil(t, result.sensors)
+			} else {
+				assert.Equal(t, len(tt.expectedConfig.sensors), len(result.sensors))
+				for sensor := range tt.expectedConfig.sensors {
+					_, exists := result.sensors[sensor]
+					assert.True(t, exists, "Sensor %s should exist in the result", sensor)
+				}
+			}
+
+			// Check flags
+			assert.Equal(t, tt.expectedConfig.isBlacklist, result.isBlacklist)
+			assert.Equal(t, tt.expectedConfig.hasWildcards, result.hasWildcards)
+
+			// Check context
+			if tt.sysSensors != "" {
+				// Verify context contains correct values
+				envMap, ok := result.context.Value(common.EnvKey).(common.EnvMap)
+				require.True(t, ok, "Context should contain EnvMap")
+				sysPath, ok := envMap[common.HostSysEnvKey]
+				require.True(t, ok, "EnvMap should contain HostSysEnvKey")
+				assert.Equal(t, tt.sysSensors, sysPath)
+			}
+		})
+	}
+}
+
+func TestNewSensorConfig(t *testing.T) {
+	// Save original environment variables
+	originalPrimary, hasPrimary := os.LookupEnv("BESZEL_AGENT_PRIMARY_SENSOR")
+	originalSys, hasSys := os.LookupEnv("BESZEL_AGENT_SYS_SENSORS")
+	originalSensors, hasSensors := os.LookupEnv("BESZEL_AGENT_SENSORS")
+
+	// Restore environment variables after the test
+	defer func() {
+		// Clean up test environment variables
+		os.Unsetenv("BESZEL_AGENT_PRIMARY_SENSOR")
+		os.Unsetenv("BESZEL_AGENT_SYS_SENSORS")
+		os.Unsetenv("BESZEL_AGENT_SENSORS")
+
+		// Restore original values if they existed
+		if hasPrimary {
+			os.Setenv("BESZEL_AGENT_PRIMARY_SENSOR", originalPrimary)
+		}
+		if hasSys {
+			os.Setenv("BESZEL_AGENT_SYS_SENSORS", originalSys)
+		}
+		if hasSensors {
+			os.Setenv("BESZEL_AGENT_SENSORS", originalSensors)
+		}
+	}()
+
+	// Set test environment variables
+	os.Setenv("BESZEL_AGENT_PRIMARY_SENSOR", "test_primary")
+	os.Setenv("BESZEL_AGENT_SYS_SENSORS", "/test/path")
+	os.Setenv("BESZEL_AGENT_SENSORS", "test_sensor1,test_*,test_sensor3")
+
+	agent := &Agent{}
+	result := agent.newSensorConfig()
+
+	// Verify results
+	assert.Equal(t, "test_primary", result.primarySensor)
+	assert.NotNil(t, result.sensors)
+	assert.Equal(t, 3, len(result.sensors))
+	assert.True(t, result.hasWildcards)
+	assert.False(t, result.isBlacklist)
+
+	// Check that sys sensors path is in context
+	envMap, ok := result.context.Value(common.EnvKey).(common.EnvMap)
+	require.True(t, ok, "Context should contain EnvMap")
+	sysPath, ok := envMap[common.HostSysEnvKey]
+	require.True(t, ok, "EnvMap should contain HostSysEnvKey")
+	assert.Equal(t, "/test/path", sysPath)
+}
+
+func TestScaleTemperature(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    float64
+		expected float64
+		desc     string
+	}{
+		// Normal temperatures (no scaling needed)
+		{"normal_cpu_temp", 45.0, 45.0, "Normal CPU temperature"},
+		{"normal_room_temp", 25.0, 25.0, "Normal room temperature"},
+		{"high_cpu_temp", 85.0, 85.0, "High CPU temperature"},
+		// Zero temperature
+		{"zero_temp", 0.0, 0.0, "Zero temperature"},
+		// Fractional values that should use 100x scaling
+		{"fractional_45c", 0.45, 45.0, "0.45 should become 45°C (100x)"},
+		{"fractional_25c", 0.25, 25.0, "0.25 should become 25°C (100x)"},
+		{"fractional_60c", 0.60, 60.0, "0.60 should become 60°C (100x)"},
+		{"fractional_75c", 0.75, 75.0, "0.75 should become 75°C (100x)"},
+		{"fractional_30c", 0.30, 30.0, "0.30 should become 30°C (100x)"},
+		// Fractional values that should use 1000x scaling
+		{"millifractional_45c", 0.045, 45.0, "0.045 should become 45°C (1000x)"},
+		{"millifractional_25c", 0.025, 25.0, "0.025 should become 25°C (1000x)"},
+		{"millifractional_60c", 0.060, 60.0, "0.060 should become 60°C (1000x)"},
+		{"millifractional_75c", 0.075, 75.0, "0.075 should become 75°C (1000x)"},
+		{"millifractional_35c", 0.035, 35.0, "0.035 should become 35°C (1000x)"},
+		// Edge cases - values outside reasonable range
+		{"very_low_fractional", 0.01, 1.0, "0.01 should default to 100x scaling (1°C)"},
+		{"very_high_fractional", 0.99, 99.0, "0.99 should default to 100x scaling (99°C)"},
+		{"extremely_low", 0.001, 0.1, "0.001 should default to 100x scaling (0.1°C)"},
+		// Boundary cases around the reasonable range (15-95°C)
+		{"boundary_low_100x", 0.15, 15.0, "0.15 should use 100x scaling (15°C)"},
+		{"boundary_high_100x", 0.95, 95.0, "0.95 should use 100x scaling (95°C)"},
+		{"boundary_low_1000x", 0.015, 15.0, "0.015 should use 1000x scaling (15°C)"},
+		{"boundary_high_1000x", 0.095, 95.0, "0.095 should use 1000x scaling (95°C)"},
+		// Values just outside reasonable range
+		{"just_below_range_100x", 0.14, 14.0, "0.14 should default to 100x (14°C)"},
+		{"just_above_range_100x", 0.96, 96.0, "0.96 should default to 100x (96°C)"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := scaleTemperature(tt.input)
+			assert.InDelta(t, tt.expected, result, 0.001,
+				"scaleTemperature(%v) = %v, expected %v (%s)",
+				tt.input, result, tt.expected, tt.desc)
+		})
+	}
+}
+
+func TestScaleTemperatureLogic(t *testing.T) {
+	// Test the logic flow for ambiguous cases
+	t.Run("prefers_100x_when_both_valid", func(t *testing.T) {
+		// 0.5 could be 50°C (100x) or 500°C (1000x)
+		// Should prefer 100x since it's tried first and is in range
+		result := scaleTemperature(0.5)
+		expected := 50.0
+		assert.InDelta(t, expected, result, 0.001,
+			"scaleTemperature(0.5) = %v, expected %v (should prefer 100x scaling)",
+			result, expected)
+	})
+
+	t.Run("uses_1000x_when_100x_too_low", func(t *testing.T) {
+		// 0.05 -> 5°C (100x, too low) or 50°C (1000x, in range)
+		// Should use 1000x since 100x is below reasonable range
+		result := scaleTemperature(0.05)
+		expected := 50.0
+		assert.InDelta(t, expected, result, 0.001,
+			"scaleTemperature(0.05) = %v, expected %v (should use 1000x scaling)",
+			result, expected)
+	})
+
+	t.Run("defaults_to_100x_when_both_invalid", func(t *testing.T) {
+		// 0.005 -> 0.5°C (100x, too low) or 5°C (1000x, too low)
+		// Should default to 100x scaling
+		result := scaleTemperature(0.005)
+		expected := 0.5
+		assert.InDelta(t, expected, result, 0.001,
+			"scaleTemperature(0.005) = %v, expected %v (should default to 100x)",
+			result, expected)
+	})
+}
+
+func TestGetTempsWithPanicRecovery(t *testing.T) {
+	agent := &Agent{
+		systemInfo: system.Info{},
+		sensorConfig: &SensorConfig{
+			context: context.Background(),
+		},
+	}
+
+	tests := []struct {
+		name        string
+		getTempsFn  getTempsFn
+		expectError bool
+		errorMsg    string
+	}{
+		{
+			name: "successful_function_call",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				return []sensors.TemperatureStat{
+					{SensorKey: "test_sensor", Temperature: 45.0},
+				}, nil
+			},
+			expectError: false,
+		},
+		{
+			name: "function_returns_error",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				return []sensors.TemperatureStat{
+					{SensorKey: "test_sensor", Temperature: 45.0},
+				}, fmt.Errorf("sensor error")
+			},
+			expectError: false, // getTempsWithPanicRecovery ignores errors from the function
+		},
+		{
+			name: "function_panics_with_string",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				panic("test panic")
+			},
+			expectError: true,
+			errorMsg:    "panic: test panic",
+		},
+		{
+			name: "function_panics_with_error",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				panic(fmt.Errorf("panic error"))
+			},
+			expectError: true,
+			errorMsg:    "panic:",
+		},
+		{
+			name: "function_panics_with_index_out_of_bounds",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				slice := []int{1, 2, 3}
+				_ = slice[10] // out of bounds panic
+				return nil, nil
+			},
+			expectError: true,
+			errorMsg:    "panic:",
+		},
+		{
+			name: "function_panics_with_any_conversion",
+			getTempsFn: func(ctx context.Context) ([]sensors.TemperatureStat, error) {
+				var i any = "string"
+				_ = i.(int) // type assertion panic
+				return nil, nil
+			},
+			expectError: true,
+			errorMsg:    "panic:",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var temps []sensors.TemperatureStat
+			var err error
+
+			// The function should not panic, regardless of what the injected function does
+			assert.NotPanics(t, func() {
+				temps, err = agent.getTempsWithPanicRecovery(tt.getTempsFn)
+			}, "getTempsWithPanicRecovery should not panic")
+
+			if tt.expectError {
+				assert.Error(t, err, "Expected an error to be returned")
+				if tt.errorMsg != "" {
+					assert.Contains(t, err.Error(), tt.errorMsg,
+						"Error message should contain expected text")
+				}
+				assert.Nil(t, temps, "Temps should be nil when panic occurs")
+			} else {
+				assert.NoError(t, err, "Should not return error for successful calls")
+			}
+		})
+	}
+}

agent/sensors_windows.go

@@ -0,0 +1,286 @@
+//go:build windows
+
+//go:generate dotnet build -c Release lhm/beszel_lhm.csproj
+
+package agent
+
+import (
+	"bufio"
+	"context"
+	"embed"
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"os"
+	"os/exec"
+	"path"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/shirou/gopsutil/v4/sensors"
+)
+
+// Note: This is always called from Agent.gatherStats() which holds Agent.Lock(),
+// so no internal concurrency protection is needed.
+
+// lhmProcess is a wrapper around the LHM .NET process.
+type lhmProcess struct {
+	cmd                  *exec.Cmd
+	stdin                io.WriteCloser
+	stdout               io.ReadCloser
+	scanner              *bufio.Scanner
+	isRunning            bool
+	stoppedNoSensors     bool
+	consecutiveNoSensors uint8
+	execPath             string
+	tempDir              string
+}
+
+//go:embed all:lhm/bin/Release/net48
+var lhmFs embed.FS
+
+var (
+	beszelLhm     *lhmProcess
+	beszelLhmOnce sync.Once
+	useLHM        = os.Getenv("LHM") == "true"
+)
+
+var errNoSensors = errors.New("no sensors found (try running as admin with LHM=true)")
+
+// newlhmProcess copies the embedded LHM executable to a temporary directory and starts it.
+func newlhmProcess() (*lhmProcess, error) {
+	destDir := filepath.Join(os.TempDir(), "beszel")
+	execPath := filepath.Join(destDir, "beszel_lhm.exe")
+
+	if err := os.MkdirAll(destDir, 0755); err != nil {
+		return nil, fmt.Errorf("failed to create temp directory: %w", err)
+	}
+
+	// Only copy if executable doesn't exist
+	if _, err := os.Stat(execPath); os.IsNotExist(err) {
+		if err := copyEmbeddedDir(lhmFs, "lhm/bin/Release/net48", destDir); err != nil {
+			return nil, fmt.Errorf("failed to copy embedded directory: %w", err)
+		}
+	}
+
+	lhm := &lhmProcess{
+		execPath: execPath,
+		tempDir:  destDir,
+	}
+
+	if err := lhm.startProcess(); err != nil {
+		return nil, fmt.Errorf("failed to start process: %w", err)
+	}
+
+	return lhm, nil
+}
+
+// startProcess starts the external LHM process
+func (lhm *lhmProcess) startProcess() error {
+	// Clean up any existing process
+	lhm.cleanupProcess()
+
+	cmd := exec.Command(lhm.execPath)
+	stdin, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+
+	stdout, err := cmd.StdoutPipe()
+	if err != nil {
+		stdin.Close()
+		return err
+	}
+
+	if err := cmd.Start(); err != nil {
+		stdin.Close()
+		stdout.Close()
+		return err
+	}
+
+	// Update process state
+	lhm.cmd = cmd
+	lhm.stdin = stdin
+	lhm.stdout = stdout
+	lhm.scanner = bufio.NewScanner(stdout)
+	lhm.isRunning = true
+
+	// Give process a moment to initialize
+	time.Sleep(100 * time.Millisecond)
+
+	return nil
+}
+
+// cleanupProcess terminates the process and closes resources but preserves files
+func (lhm *lhmProcess) cleanupProcess() {
+	lhm.isRunning = false
+
+	if lhm.cmd != nil && lhm.cmd.Process != nil {
+		lhm.cmd.Process.Kill()
+		lhm.cmd.Wait()
+	}
+
+	if lhm.stdin != nil {
+		lhm.stdin.Close()
+		lhm.stdin = nil
+	}
+	if lhm.stdout != nil {
+		lhm.stdout.Close()
+		lhm.stdout = nil
+	}
+
+	lhm.cmd = nil
+	lhm.scanner = nil
+	lhm.stoppedNoSensors = false
+	lhm.consecutiveNoSensors = 0
+}
+
+func (lhm *lhmProcess) getTemps(ctx context.Context) (temps []sensors.TemperatureStat, err error) {
+	if !useLHM || lhm.stoppedNoSensors {
+		// Fall back to gopsutil if we can't get sensors from LHM
+		return sensors.TemperaturesWithContext(ctx)
+	}
+
+	// Start process if it's not running
+	if !lhm.isRunning || lhm.stdin == nil || lhm.scanner == nil {
+		err := lhm.startProcess()
+		if err != nil {
+			return temps, err
+		}
+	}
+
+	// Send command to process
+	_, err = fmt.Fprintln(lhm.stdin, "getTemps")
+	if err != nil {
+		lhm.isRunning = false
+		return temps, fmt.Errorf("failed to send command: %w", err)
+	}
+
+	// Read all sensor lines until we hit an empty line or EOF
+	for lhm.scanner.Scan() {
+		line := strings.TrimSpace(lhm.scanner.Text())
+		if line == "" {
+			break
+		}
+
+		parts := strings.Split(line, "|")
+		if len(parts) != 2 {
+			slog.Debug("Invalid sensor format", "line", line)
+			continue
+		}
+
+		name := strings.TrimSpace(parts[0])
+		valueStr := strings.TrimSpace(parts[1])
+
+		value, err := strconv.ParseFloat(valueStr, 64)
+		if err != nil {
+			slog.Debug("Failed to parse sensor", "err", err, "line", line)
+			continue
+		}
+
+		if name == "" || value <= 0 || value > 150 {
+			slog.Debug("Invalid sensor", "name", name, "val", value, "line", line)
+			continue
+		}
+
+		temps = append(temps, sensors.TemperatureStat{
+			SensorKey:   name,
+			Temperature: value,
+		})
+	}
+
+	if err := lhm.scanner.Err(); err != nil {
+		lhm.isRunning = false
+		return temps, err
+	}
+
+	// Handle no sensors case
+	if len(temps) == 0 {
+		lhm.consecutiveNoSensors++
+		if lhm.consecutiveNoSensors >= 3 {
+			lhm.stoppedNoSensors = true
+			slog.Warn(errNoSensors.Error())
+			lhm.cleanup()
+		}
+		return sensors.TemperaturesWithContext(ctx)
+	}
+
+	lhm.consecutiveNoSensors = 0
+
+	return temps, nil
+}
+
+// getSensorTemps attempts to pull sensor temperatures from the embedded LHM process.
+// NB: LibreHardwareMonitorLib requires admin privileges to access all available sensors.
+func getSensorTemps(ctx context.Context) (temps []sensors.TemperatureStat, err error) {
+	defer func() {
+		if err != nil {
+			slog.Debug("Error reading sensors", "err", err)
+		}
+	}()
+
+	if !useLHM {
+		return sensors.TemperaturesWithContext(ctx)
+	}
+
+	// Initialize process once
+	beszelLhmOnce.Do(func() {
+		beszelLhm, err = newlhmProcess()
+	})
+
+	if err != nil {
+		return temps, fmt.Errorf("failed to initialize lhm: %w", err)
+	}
+
+	if beszelLhm == nil {
+		return temps, fmt.Errorf("lhm not available")
+	}
+
+	return beszelLhm.getTemps(ctx)
+}
+
+// cleanup terminates the process and closes resources
+func (lhm *lhmProcess) cleanup() {
+	lhm.cleanupProcess()
+	if lhm.tempDir != "" {
+		os.RemoveAll(lhm.tempDir)
+	}
+}
+
+// copyEmbeddedDir copies the embedded directory to the destination path
+func copyEmbeddedDir(fs embed.FS, srcPath, destPath string) error {
+	entries, err := fs.ReadDir(srcPath)
+	if err != nil {
+		return err
+	}
+	if err := os.MkdirAll(destPath, 0755); err != nil {
+		return err
+	}
+
+	for _, entry := range entries {
+		srcEntryPath := path.Join(srcPath, entry.Name())
+		destEntryPath := filepath.Join(destPath, entry.Name())
+
+		if entry.IsDir() {
+			if err := copyEmbeddedDir(fs, srcEntryPath, destEntryPath); err != nil {
+				return err
+			}
+			continue
+		}
+
+		data, err := fs.ReadFile(srcEntryPath)
+		if err != nil {
+			return err
+		}
+
+		if err := os.WriteFile(destEntryPath, data, 0755); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

agent/server.go

@@ -0,0 +1,289 @@
+package agent
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"log/slog"
+	"net"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/henrygd/beszel"
+	"github.com/henrygd/beszel/internal/common"
+	"github.com/henrygd/beszel/internal/entities/smart"
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/blang/semver"
+	"github.com/fxamacker/cbor/v2"
+	"github.com/gliderlabs/ssh"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+// ServerOptions contains configuration options for starting the SSH server.
+type ServerOptions struct {
+	Addr    string            // Network address to listen on (e.g., ":45876" or "/path/to/socket")
+	Network string            // Network type ("tcp" or "unix")
+	Keys    []gossh.PublicKey // SSH public keys for authentication
+}
+
+// hubVersions caches hub versions by session ID to avoid repeated parsing.
+var hubVersions map[string]semver.Version
+
+// StartServer starts the SSH server with the provided options.
+// It configures the server with secure defaults, sets up authentication,
+// and begins listening for connections. Returns an error if the server
+// is already running or if there's an issue starting the server.
+func (a *Agent) StartServer(opts ServerOptions) error {
+	if a.server != nil {
+		return errors.New("server already started")
+	}
+
+	slog.Info("Starting SSH server", "addr", opts.Addr, "network", opts.Network)
+
+	if opts.Network == "unix" {
+		// remove existing socket file if it exists
+		if err := os.Remove(opts.Addr); err != nil && !os.IsNotExist(err) {
+			return err
+		}
+	}
+
+	// start listening on the address
+	ln, err := net.Listen(opts.Network, opts.Addr)
+	if err != nil {
+		return err
+	}
+	defer ln.Close()
+
+	// base config (limit to allowed algorithms)
+	config := &gossh.ServerConfig{
+		ServerVersion: fmt.Sprintf("SSH-2.0-%s_%s", beszel.AppName, beszel.Version),
+	}
+	config.KeyExchanges = common.DefaultKeyExchanges
+	config.MACs = common.DefaultMACs
+	config.Ciphers = common.DefaultCiphers
+
+	// set default handler
+	ssh.Handle(a.handleSession)
+
+	a.server = &ssh.Server{
+		ServerConfigCallback: func(ctx ssh.Context) *gossh.ServerConfig {
+			return config
+		},
+		// check public key(s)
+		PublicKeyHandler: func(ctx ssh.Context, key ssh.PublicKey) bool {
+			remoteAddr := ctx.RemoteAddr()
+			for _, pubKey := range opts.Keys {
+				if ssh.KeysEqual(key, pubKey) {
+					slog.Info("SSH connected", "addr", remoteAddr)
+					return true
+				}
+			}
+			slog.Warn("Invalid SSH key", "addr", remoteAddr)
+			return false
+		},
+		// disable pty
+		PtyCallback: func(ctx ssh.Context, pty ssh.Pty) bool {
+			return false
+		},
+		// close idle connections after 70 seconds
+		IdleTimeout: 70 * time.Second,
+	}
+
+	// Start SSH server on the listener
+	return a.server.Serve(ln)
+}
+
+// getHubVersion retrieves and caches the hub version for a given session.
+// It extracts the version from the SSH client version string and caches
+// it to avoid repeated parsing. Returns a zero version if parsing fails.
+func (a *Agent) getHubVersion(sessionId string, sessionCtx ssh.Context) semver.Version {
+	if hubVersions == nil {
+		hubVersions = make(map[string]semver.Version, 1)
+	}
+	hubVersion, ok := hubVersions[sessionId]
+	if ok {
+		return hubVersion
+	}
+	// Extract hub version from SSH client version
+	clientVersion := sessionCtx.Value(ssh.ContextKeyClientVersion)
+	if versionStr, ok := clientVersion.(string); ok {
+		hubVersion, _ = extractHubVersion(versionStr)
+	}
+	hubVersions[sessionId] = hubVersion
+	return hubVersion
+}
+
+// handleSession handles an incoming SSH session by gathering system statistics
+// and sending them to the hub. It signals connection events, determines the
+// appropriate encoding format based on hub version, and exits with appropriate
+// status codes.
+func (a *Agent) handleSession(s ssh.Session) {
+	a.connectionManager.eventChan <- SSHConnect
+
+	sessionCtx := s.Context()
+	sessionID := sessionCtx.SessionID()
+
+	hubVersion := a.getHubVersion(sessionID, sessionCtx)
+
+	// Legacy one-shot behavior for older hubs
+	if hubVersion.LT(beszel.MinVersionAgentResponse) {
+		if err := a.handleLegacyStats(s, hubVersion); err != nil {
+			slog.Error("Error encoding stats", "err", err)
+			s.Exit(1)
+			return
+		}
+	}
+
+	var req common.HubRequest[cbor.RawMessage]
+	if err := cbor.NewDecoder(s).Decode(&req); err != nil {
+		// Fallback to legacy one-shot if the first decode fails
+		if err2 := a.handleLegacyStats(s, hubVersion); err2 != nil {
+			slog.Error("Error encoding stats (fallback)", "err", err2)
+			s.Exit(1)
+			return
+		}
+		s.Exit(0)
+		return
+	}
+	if err := a.handleSSHRequest(s, &req); err != nil {
+		slog.Error("SSH request handling failed", "err", err)
+		s.Exit(1)
+		return
+	}
+	s.Exit(0)
+}
+
+// handleSSHRequest builds a handler context and dispatches to the shared registry
+func (a *Agent) handleSSHRequest(w io.Writer, req *common.HubRequest[cbor.RawMessage]) error {
+	// SSH does not support fingerprint auth action
+	if req.Action == common.CheckFingerprint {
+		return cbor.NewEncoder(w).Encode(common.AgentResponse{Error: "unsupported action"})
+	}
+
+	// responder that writes AgentResponse to stdout
+	sshResponder := func(data any, requestID *uint32) error {
+		response := common.AgentResponse{Id: requestID}
+		switch v := data.(type) {
+		case *system.CombinedData:
+			response.SystemData = v
+		case string:
+			response.String = &v
+		case map[string]smart.SmartData:
+			response.SmartData = v
+		default:
+			response.Error = fmt.Sprintf("unsupported response type: %T", data)
+		}
+		return cbor.NewEncoder(w).Encode(response)
+	}
+
+	ctx := &HandlerContext{
+		Client:       nil,
+		Agent:        a,
+		Request:      req,
+		RequestID:    nil,
+		HubVerified:  true,
+		SendResponse: sshResponder,
+	}
+
+	if handler, ok := a.handlerRegistry.GetHandler(req.Action); ok {
+		if err := handler.Handle(ctx); err != nil {
+			return cbor.NewEncoder(w).Encode(common.AgentResponse{Error: err.Error()})
+		}
+		return nil
+	}
+	return cbor.NewEncoder(w).Encode(common.AgentResponse{Error: fmt.Sprintf("unknown action: %d", req.Action)})
+}
+
+// handleLegacyStats serves the legacy one-shot stats payload for older hubs
+func (a *Agent) handleLegacyStats(w io.Writer, hubVersion semver.Version) error {
+	stats := a.gatherStats(60_000)
+	return a.writeToSession(w, stats, hubVersion)
+}
+
+// writeToSession encodes and writes system statistics to the session.
+// It chooses between CBOR and JSON encoding based on the hub version,
+// using CBOR for newer versions and JSON for legacy compatibility.
+func (a *Agent) writeToSession(w io.Writer, stats *system.CombinedData, hubVersion semver.Version) error {
+	if hubVersion.GTE(beszel.MinVersionCbor) {
+		return cbor.NewEncoder(w).Encode(stats)
+	}
+	return json.NewEncoder(w).Encode(stats)
+}
+
+// extractHubVersion extracts the beszel version from SSH client version string.
+// Expected format: "SSH-2.0-beszel_X.Y.Z" or "beszel_X.Y.Z"
+func extractHubVersion(versionString string) (semver.Version, error) {
+	_, after, _ := strings.Cut(versionString, "_")
+	return semver.Parse(after)
+}
+
+// ParseKeys parses a string containing SSH public keys in authorized_keys format.
+// It returns a slice of ssh.PublicKey and an error if any key fails to parse.
+func ParseKeys(input string) ([]gossh.PublicKey, error) {
+	var parsedKeys []gossh.PublicKey
+	for line := range strings.Lines(input) {
+		line = strings.TrimSpace(line)
+		// Skip empty lines or comments
+		if len(line) == 0 || strings.HasPrefix(line, "#") {
+			continue
+		}
+		// Parse the key
+		parsedKey, _, _, _, err := gossh.ParseAuthorizedKey([]byte(line))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse key: %s, error: %w", line, err)
+		}
+		parsedKeys = append(parsedKeys, parsedKey)
+	}
+	return parsedKeys, nil
+}
+
+// GetAddress determines the network address to listen on from various sources.
+// It checks the provided address, then environment variables (LISTEN, PORT),
+// and finally defaults to ":45876".
+func GetAddress(addr string) string {
+	if addr == "" {
+		addr, _ = GetEnv("LISTEN")
+	}
+	if addr == "" {
+		// Legacy PORT environment variable support
+		addr, _ = GetEnv("PORT")
+	}
+	if addr == "" {
+		return ":45876"
+	}
+	// prefix with : if only port was provided
+	if GetNetwork(addr) != "unix" && !strings.Contains(addr, ":") {
+		addr = ":" + addr
+	}
+	return addr
+}
+
+// GetNetwork determines the network type based on the address format.
+// It checks the NETWORK environment variable first, then infers from
+// the address format: addresses starting with "/" are "unix", others are "tcp".
+func GetNetwork(addr string) string {
+	if network, ok := GetEnv("NETWORK"); ok && network != "" {
+		return network
+	}
+	if strings.HasPrefix(addr, "/") {
+		return "unix"
+	}
+	return "tcp"
+}
+
+// StopServer stops the SSH server if it's running.
+// It returns an error if the server is not running or if there's an error stopping it.
+func (a *Agent) StopServer() error {
+	if a.server == nil {
+		return errors.New("SSH server not running")
+	}
+
+	slog.Info("Stopping SSH server")
+	_ = a.server.Close()
+	a.server = nil
+	a.connectionManager.eventChan <- SSHDisconnect
+	return nil
+}

agent/server_test.go

@@ -0,0 +1,606 @@
+package agent
+
+import (
+	"context"
+	"crypto/ed25519"
+	"encoding/json"
+	"fmt"
+	"net"
+	"os"
+	"path/filepath"
+	"strings"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/container"
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/blang/semver"
+	"github.com/fxamacker/cbor/v2"
+	"github.com/gliderlabs/ssh"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	gossh "golang.org/x/crypto/ssh"
+)
+
+func TestStartServer(t *testing.T) {
+	// Generate a test key pair
+	pubKey, privKey, err := ed25519.GenerateKey(nil)
+	require.NoError(t, err)
+	signer, err := gossh.NewSignerFromKey(privKey)
+	require.NoError(t, err)
+	sshPubKey, err := gossh.NewPublicKey(pubKey)
+	require.NoError(t, err)
+
+	// Generate a different key pair for bad key test
+	badPubKey, badPrivKey, err := ed25519.GenerateKey(nil)
+	require.NoError(t, err)
+	badSigner, err := gossh.NewSignerFromKey(badPrivKey)
+	require.NoError(t, err)
+	sshBadPubKey, err := gossh.NewPublicKey(badPubKey)
+	require.NoError(t, err)
+
+	socketFile := filepath.Join(t.TempDir(), "beszel-test.sock")
+
+	tests := []struct {
+		name        string
+		config      ServerOptions
+		wantErr     bool
+		errContains string
+		setup       func() error
+		cleanup     func() error
+	}{
+		{
+			name: "tcp port only",
+			config: ServerOptions{
+				Network: "tcp",
+				Addr:    ":45987",
+				Keys:    []gossh.PublicKey{sshPubKey},
+			},
+		},
+		{
+			name: "tcp with ipv4",
+			config: ServerOptions{
+				Network: "tcp4",
+				Addr:    "127.0.0.1:45988",
+				Keys:    []gossh.PublicKey{sshPubKey},
+			},
+		},
+		{
+			name: "tcp with ipv6",
+			config: ServerOptions{
+				Network: "tcp6",
+				Addr:    "[::1]:45989",
+				Keys:    []gossh.PublicKey{sshPubKey},
+			},
+		},
+		{
+			name: "unix socket",
+			config: ServerOptions{
+				Network: "unix",
+				Addr:    socketFile,
+				Keys:    []gossh.PublicKey{sshPubKey},
+			},
+			setup: func() error {
+				// Create a socket file that should be removed
+				f, err := os.Create(socketFile)
+				if err != nil {
+					return err
+				}
+				return f.Close()
+			},
+			cleanup: func() error {
+				return os.Remove(socketFile)
+			},
+		},
+		{
+			name: "bad key should fail",
+			config: ServerOptions{
+				Network: "tcp",
+				Addr:    ":45987",
+				Keys:    []gossh.PublicKey{sshBadPubKey},
+			},
+			wantErr:     true,
+			errContains: "ssh: handshake failed",
+		},
+		{
+			name: "good key still good",
+			config: ServerOptions{
+				Network: "tcp",
+				Addr:    ":45987",
+				Keys:    []gossh.PublicKey{sshPubKey},
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.setup != nil {
+				err := tt.setup()
+				require.NoError(t, err)
+			}
+
+			if tt.cleanup != nil {
+				defer tt.cleanup()
+			}
+
+			agent, err := NewAgent("")
+			require.NoError(t, err)
+
+			// Start server in a goroutine since it blocks
+			errChan := make(chan error, 1)
+			go func() {
+				errChan <- agent.StartServer(tt.config)
+			}()
+
+			// Add a short delay to allow the server to start
+			time.Sleep(100 * time.Millisecond)
+
+			// Try to connect to verify server is running
+			var client *gossh.Client
+
+			// Choose the appropriate signer based on the test case
+			testSigner := signer
+			if tt.name == "bad key should fail" {
+				testSigner = badSigner
+			}
+
+			sshClientConfig := &gossh.ClientConfig{
+				User: "a",
+				Auth: []gossh.AuthMethod{
+					gossh.PublicKeys(testSigner),
+				},
+				HostKeyCallback: gossh.InsecureIgnoreHostKey(),
+				Timeout:         4 * time.Second,
+			}
+
+			switch tt.config.Network {
+			case "unix":
+				client, err = gossh.Dial("unix", tt.config.Addr, sshClientConfig)
+			default:
+				if !strings.Contains(tt.config.Addr, ":") {
+					tt.config.Addr = ":" + tt.config.Addr
+				}
+				client, err = gossh.Dial("tcp", tt.config.Addr, sshClientConfig)
+			}
+
+			if tt.wantErr {
+				assert.Error(t, err)
+				if tt.errContains != "" {
+					assert.Contains(t, err.Error(), tt.errContains)
+				}
+				return
+			}
+
+			require.NoError(t, err)
+			require.NotNil(t, client)
+			client.Close()
+		})
+	}
+}
+
+/////////////////////////////////////////////////////////////////
+//////////////////// ParseKeys Tests ////////////////////////////
+/////////////////////////////////////////////////////////////////
+
+// Helper function to generate a temporary file with content
+func createTempFile(content string) (string, error) {
+	tmpFile, err := os.CreateTemp("", "ssh_keys_*.txt")
+	if err != nil {
+		return "", fmt.Errorf("failed to create temp file: %w", err)
+	}
+	defer tmpFile.Close()
+
+	if _, err := tmpFile.WriteString(content); err != nil {
+		return "", fmt.Errorf("failed to write to temp file: %w", err)
+	}
+
+	return tmpFile.Name(), nil
+}
+
+// Test case 1: String with a single SSH key
+func TestParseSingleKeyFromString(t *testing.T) {
+	input := "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKCBM91kukN7hbvFKtbpEeo2JXjCcNxXcdBH7V7ADMBo"
+	keys, err := ParseKeys(input)
+	if err != nil {
+		t.Fatalf("Expected no error, got: %v", err)
+	}
+	if len(keys) != 1 {
+		t.Fatalf("Expected 1 key, got %d keys", len(keys))
+	}
+	if keys[0].Type() != "ssh-ed25519" {
+		t.Fatalf("Expected key type 'ssh-ed25519', got '%s'", keys[0].Type())
+	}
+}
+
+// Test case 2: String with multiple SSH keys
+func TestParseMultipleKeysFromString(t *testing.T) {
+	input := "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKCBM91kukN7hbvFKtbpEeo2JXjCcNxXcdBH7V7ADMBo\nssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJDMtAOQfxDlCxe+A5lVbUY/DHxK1LAF2Z3AV0FYv36D \n #comment\n ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJDMtAOQfxDlCxe+A5lVbUY/DHxK1LAF2Z3AV0FYv36D"
+	keys, err := ParseKeys(input)
+	if err != nil {
+		t.Fatalf("Expected no error, got: %v", err)
+	}
+	if len(keys) != 3 {
+		t.Fatalf("Expected 3 keys, got %d keys", len(keys))
+	}
+	if keys[0].Type() != "ssh-ed25519" || keys[1].Type() != "ssh-ed25519" || keys[2].Type() != "ssh-ed25519" {
+		t.Fatalf("Unexpected key types: %s, %s, %s", keys[0].Type(), keys[1].Type(), keys[2].Type())
+	}
+}
+
+// Test case 3: File with a single SSH key
+func TestParseSingleKeyFromFile(t *testing.T) {
+	content := "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKCBM91kukN7hbvFKtbpEeo2JXjCcNxXcdBH7V7ADMBo"
+	filePath, err := createTempFile(content)
+	if err != nil {
+		t.Fatalf("Failed to create temp file: %v", err)
+	}
+	defer os.Remove(filePath) // Clean up the file after the test
+
+	// Read the file content
+	fileContent, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("Failed to read temp file: %v", err)
+	}
+
+	// Parse the keys
+	keys, err := ParseKeys(string(fileContent))
+	if err != nil {
+		t.Fatalf("Expected no error, got: %v", err)
+	}
+	if len(keys) != 1 {
+		t.Fatalf("Expected 1 key, got %d keys", len(keys))
+	}
+	if keys[0].Type() != "ssh-ed25519" {
+		t.Fatalf("Expected key type 'ssh-ed25519', got '%s'", keys[0].Type())
+	}
+}
+
+// Test case 4: File with multiple SSH keys
+func TestParseMultipleKeysFromFile(t *testing.T) {
+	content := "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIKCBM91kukN7hbvFKtbpEeo2JXjCcNxXcdBH7V7ADMBo\nssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJDMtAOQfxDlCxe+A5lVbUY/DHxK1LAF2Z3AV0FYv36D \n #comment\n ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJDMtAOQfxDlCxe+A5lVbUY/DHxK1LAF2Z3AV0FYv36D"
+	filePath, err := createTempFile(content)
+	if err != nil {
+		t.Fatalf("Failed to create temp file: %v", err)
+	}
+	// defer os.Remove(filePath) // Clean up the file after the test
+
+	// Read the file content
+	fileContent, err := os.ReadFile(filePath)
+	if err != nil {
+		t.Fatalf("Failed to read temp file: %v", err)
+	}
+
+	// Parse the keys
+	keys, err := ParseKeys(string(fileContent))
+	if err != nil {
+		t.Fatalf("Expected no error, got: %v", err)
+	}
+	if len(keys) != 3 {
+		t.Fatalf("Expected 3 keys, got %d keys", len(keys))
+	}
+	if keys[0].Type() != "ssh-ed25519" || keys[1].Type() != "ssh-ed25519" || keys[2].Type() != "ssh-ed25519" {
+		t.Fatalf("Unexpected key types: %s, %s, %s", keys[0].Type(), keys[1].Type(), keys[2].Type())
+	}
+}
+
+// Test case 5: Invalid SSH key input
+func TestParseInvalidKey(t *testing.T) {
+	input := "invalid-key-data"
+	_, err := ParseKeys(input)
+	if err == nil {
+		t.Fatalf("Expected an error for invalid key, got nil")
+	}
+	expectedErrMsg := "failed to parse key"
+	if !strings.Contains(err.Error(), expectedErrMsg) {
+		t.Fatalf("Expected error message to contain '%s', got: %v", expectedErrMsg, err)
+	}
+}
+
+/////////////////////////////////////////////////////////////////
+//////////////////// Hub Version Tests //////////////////////////
+/////////////////////////////////////////////////////////////////
+
+func TestExtractHubVersion(t *testing.T) {
+	tests := []struct {
+		name            string
+		clientVersion   string
+		expectedVersion string
+		expectError     bool
+	}{
+		{
+			name:            "valid beszel client version with underscore",
+			clientVersion:   "SSH-2.0-beszel_0.11.1",
+			expectedVersion: "0.11.1",
+			expectError:     false,
+		},
+		{
+			name:            "valid beszel client version with beta",
+			clientVersion:   "SSH-2.0-beszel_1.0.0-beta",
+			expectedVersion: "1.0.0-beta",
+			expectError:     false,
+		},
+		{
+			name:            "valid beszel client version with rc",
+			clientVersion:   "SSH-2.0-beszel_0.12.0-rc1",
+			expectedVersion: "0.12.0-rc1",
+			expectError:     false,
+		},
+		{
+			name:            "different SSH client",
+			clientVersion:   "SSH-2.0-OpenSSH_8.0",
+			expectedVersion: "8.0",
+			expectError:     true,
+		},
+		{
+			name:          "malformed version string without underscore",
+			clientVersion: "SSH-2.0-beszel",
+			expectError:   true,
+		},
+		{
+			name:          "empty version string",
+			clientVersion: "",
+			expectError:   true,
+		},
+		{
+			name:            "version string with underscore but no version",
+			clientVersion:   "beszel_",
+			expectedVersion: "",
+			expectError:     true,
+		},
+		{
+			name:            "version with patch and build metadata",
+			clientVersion:   "SSH-2.0-beszel_1.2.3+build.123",
+			expectedVersion: "1.2.3+build.123",
+			expectError:     false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, err := extractHubVersion(tt.clientVersion)
+
+			if tt.expectError {
+				assert.Error(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+			assert.Equal(t, tt.expectedVersion, result.String())
+		})
+	}
+}
+
+/////////////////////////////////////////////////////////////////
+/////////////// Hub Version Detection Tests ////////////////////
+/////////////////////////////////////////////////////////////////
+
+func TestGetHubVersion(t *testing.T) {
+	agent, err := NewAgent("")
+	require.NoError(t, err)
+
+	// Mock SSH context that implements the ssh.Context interface
+	mockCtx := &mockSSHContext{
+		sessionID:     "test-session-123",
+		clientVersion: "SSH-2.0-beszel_0.12.0",
+	}
+
+	// Test first call - should extract and cache version
+	version := agent.getHubVersion("test-session-123", mockCtx)
+	assert.Equal(t, "0.12.0", version.String())
+
+	// Test second call - should return cached version
+	mockCtx.clientVersion = "SSH-2.0-beszel_0.11.0" // Change version but should still return cached
+	version = agent.getHubVersion("test-session-123", mockCtx)
+	assert.Equal(t, "0.12.0", version.String()) // Should still be cached version
+
+	// Test different session - should extract new version
+	version = agent.getHubVersion("different-session", mockCtx)
+	assert.Equal(t, "0.11.0", version.String())
+
+	// Test with invalid version string (non-beszel client)
+	mockCtx.clientVersion = "SSH-2.0-OpenSSH_8.0"
+	version = agent.getHubVersion("invalid-session", mockCtx)
+	assert.Equal(t, "0.0.0", version.String()) // Should be empty version for non-beszel clients
+
+	// Test with no client version
+	mockCtx.clientVersion = ""
+	version = agent.getHubVersion("no-version-session", mockCtx)
+	assert.True(t, version.EQ(semver.Version{})) // Should be empty version
+}
+
+// mockSSHContext implements ssh.Context for testing
+type mockSSHContext struct {
+	context.Context
+	sync.Mutex
+	sessionID     string
+	clientVersion string
+}
+
+func (m *mockSSHContext) SessionID() string {
+	return m.sessionID
+}
+
+func (m *mockSSHContext) ClientVersion() string {
+	return m.clientVersion
+}
+
+func (m *mockSSHContext) ServerVersion() string {
+	return "SSH-2.0-beszel_test"
+}
+
+func (m *mockSSHContext) Value(key interface{}) interface{} {
+	if key == ssh.ContextKeyClientVersion {
+		return m.clientVersion
+	}
+	return nil
+}
+
+func (m *mockSSHContext) User() string                    { return "test-user" }
+func (m *mockSSHContext) RemoteAddr() net.Addr            { return nil }
+func (m *mockSSHContext) LocalAddr() net.Addr             { return nil }
+func (m *mockSSHContext) Permissions() *ssh.Permissions   { return nil }
+func (m *mockSSHContext) SetValue(key, value interface{}) {}
+
+/////////////////////////////////////////////////////////////////
+/////////////// CBOR vs JSON Encoding Tests ////////////////////
+/////////////////////////////////////////////////////////////////
+
+// TestWriteToSessionEncoding tests that writeToSession actually encodes data in the correct format
+func TestWriteToSessionEncoding(t *testing.T) {
+	tests := []struct {
+		name             string
+		hubVersion       string
+		expectedUsesCbor bool
+	}{
+		{
+			name:             "old hub version should use JSON",
+			hubVersion:       "0.11.1",
+			expectedUsesCbor: false,
+		},
+		{
+			name:             "non-beta release should use CBOR",
+			hubVersion:       "0.12.0",
+			expectedUsesCbor: true,
+		},
+		{
+			name:             "even newer hub version should use CBOR",
+			hubVersion:       "0.16.4",
+			expectedUsesCbor: true,
+		},
+		{
+			name:             "beta version below release threshold should use JSON",
+			hubVersion:       "0.12.0-beta0",
+			expectedUsesCbor: false,
+		},
+		// {
+		// 	name:             "matching beta version should use CBOR",
+		// 	hubVersion:       "0.12.0-beta2",
+		// 	expectedUsesCbor: true,
+		// },
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			// Reset the global hubVersions map to ensure clean state for each test
+			hubVersions = nil
+
+			agent, err := NewAgent("")
+			require.NoError(t, err)
+
+			// Parse the test version
+			version, err := semver.Parse(tt.hubVersion)
+			require.NoError(t, err)
+
+			// Create test data to encode
+			testData := createTestCombinedData()
+
+			var buf strings.Builder
+			err = agent.writeToSession(&buf, testData, version)
+			require.NoError(t, err)
+
+			encodedData := buf.String()
+			require.NotEmpty(t, encodedData)
+
+			// Verify the encoding format by attempting to decode
+			if tt.expectedUsesCbor {
+				var decodedCbor system.CombinedData
+				err = cbor.Unmarshal([]byte(encodedData), &decodedCbor)
+				assert.NoError(t, err, "Should be valid CBOR data")
+
+				var decodedJson system.CombinedData
+				err = json.Unmarshal([]byte(encodedData), &decodedJson)
+				assert.Error(t, err, "Should not be valid JSON data")
+
+				assert.Equal(t, testData.Info.Hostname, decodedCbor.Info.Hostname)
+				assert.Equal(t, testData.Stats.Cpu, decodedCbor.Stats.Cpu)
+			} else {
+				// Should be JSON - try to decode as JSON
+				var decodedJson system.CombinedData
+				err = json.Unmarshal([]byte(encodedData), &decodedJson)
+				assert.NoError(t, err, "Should be valid JSON data")
+
+				var decodedCbor system.CombinedData
+				err = cbor.Unmarshal([]byte(encodedData), &decodedCbor)
+				assert.Error(t, err, "Should not be valid CBOR data")
+
+				// Verify the decoded JSON data matches our test data
+				assert.Equal(t, testData.Info.Hostname, decodedJson.Info.Hostname)
+				assert.Equal(t, testData.Stats.Cpu, decodedJson.Stats.Cpu)
+
+				// Verify it looks like JSON (starts with '{' and contains readable field names)
+				assert.True(t, strings.HasPrefix(encodedData, "{"), "JSON should start with '{'")
+				assert.Contains(t, encodedData, `"info"`, "JSON should contain readable field names")
+				assert.Contains(t, encodedData, `"stats"`, "JSON should contain readable field names")
+			}
+		})
+	}
+}
+
+// Helper function to create test data for encoding tests
+func createTestCombinedData() *system.CombinedData {
+	return &system.CombinedData{
+		Stats: system.Stats{
+			Cpu:       25.5,
+			Mem:       8589934592, // 8GB
+			MemUsed:   4294967296, // 4GB
+			MemPct:    50.0,
+			DiskTotal: 1099511627776, // 1TB
+			DiskUsed:  549755813888,  // 512GB
+			DiskPct:   50.0,
+		},
+		Info: system.Info{
+			Hostname:     "test-host",
+			Cores:        8,
+			CpuModel:     "Test CPU Model",
+			Uptime:       3600,
+			AgentVersion: "0.12.0",
+			Os:           system.Linux,
+		},
+		Containers: []*container.Stats{
+			{
+				Name: "test-container",
+				Cpu:  10.5,
+				Mem:  1073741824, // 1GB
+			},
+		},
+	}
+}
+
+func TestHubVersionCaching(t *testing.T) {
+	// Reset the global hubVersions map to ensure clean state
+	hubVersions = nil
+
+	agent, err := NewAgent("")
+	require.NoError(t, err)
+
+	ctx1 := &mockSSHContext{
+		sessionID:     "session1",
+		clientVersion: "SSH-2.0-beszel_0.12.0",
+	}
+	ctx2 := &mockSSHContext{
+		sessionID:     "session2",
+		clientVersion: "SSH-2.0-beszel_0.11.0",
+	}
+
+	// First calls should cache the versions
+	v1 := agent.getHubVersion("session1", ctx1)
+	v2 := agent.getHubVersion("session2", ctx2)
+
+	assert.Equal(t, "0.12.0", v1.String())
+	assert.Equal(t, "0.11.0", v2.String())
+
+	// Verify caching by changing context but keeping same session ID
+	ctx1.clientVersion = "SSH-2.0-beszel_0.10.0"
+	v1Cached := agent.getHubVersion("session1", ctx1)
+	assert.Equal(t, "0.12.0", v1Cached.String()) // Should still be cached version
+
+	// New session should get new version
+	ctx3 := &mockSSHContext{
+		sessionID:     "session3",
+		clientVersion: "SSH-2.0-beszel_0.13.0",
+	}
+	v3 := agent.getHubVersion("session3", ctx3)
+	assert.Equal(t, "0.13.0", v3.String())
+}

agent/smart.go

@@ -0,0 +1,432 @@
+package agent
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"os/exec"
+	"strings"
+	"sync"
+	"time"
+
+	"github.com/henrygd/beszel/internal/entities/smart"
+
+	"golang.org/x/exp/slog"
+)
+
+// SmartManager manages data collection for SMART devices
+type SmartManager struct {
+	sync.Mutex
+	SmartDataMap map[string]*smart.SmartData
+	SmartDevices []*DeviceInfo
+	refreshMutex sync.Mutex
+}
+
+type scanOutput struct {
+	Devices []struct {
+		Name     string `json:"name"`
+		Type     string `json:"type"`
+		InfoName string `json:"info_name"`
+		Protocol string `json:"protocol"`
+	} `json:"devices"`
+}
+
+type DeviceInfo struct {
+	Name     string `json:"name"`
+	Type     string `json:"type"`
+	InfoName string `json:"info_name"`
+	Protocol string `json:"protocol"`
+}
+
+var errNoValidSmartData = fmt.Errorf("no valid SMART data found") // Error for missing data
+
+// Refresh updates SMART data for all known devices on demand.
+func (sm *SmartManager) Refresh() error {
+	sm.refreshMutex.Lock()
+	defer sm.refreshMutex.Unlock()
+
+	scanErr := sm.ScanDevices()
+	if scanErr != nil {
+		slog.Debug("smartctl scan failed", "err", scanErr)
+	}
+
+	devices := sm.devicesSnapshot()
+	var collectErr error
+	for _, deviceInfo := range devices {
+		if deviceInfo == nil {
+			continue
+		}
+		if err := sm.CollectSmart(deviceInfo); err != nil {
+			slog.Debug("smartctl collect failed, skipping", "device", deviceInfo.Name, "err", err)
+			collectErr = err
+		}
+	}
+
+	return sm.resolveRefreshError(scanErr, collectErr)
+}
+
+// devicesSnapshot returns a copy of the current device slice to avoid iterating
+// while holding the primary mutex for longer than necessary.
+func (sm *SmartManager) devicesSnapshot() []*DeviceInfo {
+	sm.Lock()
+	defer sm.Unlock()
+
+	devices := make([]*DeviceInfo, len(sm.SmartDevices))
+	copy(devices, sm.SmartDevices)
+	return devices
+}
+
+// hasSmartData reports whether any SMART data has been collected.
+// func (sm *SmartManager) hasSmartData() bool {
+// 	sm.Lock()
+// 	defer sm.Unlock()
+
+// 	return len(sm.SmartDataMap) > 0
+// }
+
+// resolveRefreshError determines the proper error to return after a refresh.
+func (sm *SmartManager) resolveRefreshError(scanErr, collectErr error) error {
+	sm.Lock()
+	noDevices := len(sm.SmartDevices) == 0
+	noData := len(sm.SmartDataMap) == 0
+	sm.Unlock()
+
+	if noDevices {
+		if scanErr != nil {
+			return scanErr
+		}
+	}
+
+	if !noData {
+		return nil
+	}
+
+	if collectErr != nil {
+		return collectErr
+	}
+	if scanErr != nil {
+		return scanErr
+	}
+	return errNoValidSmartData
+}
+
+// GetCurrentData returns the current SMART data
+func (sm *SmartManager) GetCurrentData() map[string]smart.SmartData {
+	sm.Lock()
+	defer sm.Unlock()
+	result := make(map[string]smart.SmartData, len(sm.SmartDataMap))
+	for key, value := range sm.SmartDataMap {
+		if value != nil {
+			result[key] = *value
+		}
+	}
+	return result
+}
+
+// ScanDevices scans for SMART devices
+// Scan devices using `smartctl --scan -j`
+// If scan fails, return error
+// If scan succeeds, parse the output and update the SmartDevices slice
+func (sm *SmartManager) ScanDevices() error {
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	cmd := exec.CommandContext(ctx, "smartctl", "--scan", "-j")
+	output, err := cmd.Output()
+
+	if err != nil {
+		return err
+	}
+
+	hasValidData := sm.parseScan(output)
+	if !hasValidData {
+		return errNoValidSmartData
+	}
+	return nil
+}
+
+// CollectSmart collects SMART data for a device
+// Collect data using `smartctl --all -j /dev/sdX` or `smartctl --all -j /dev/nvmeX`
+// Always attempts to parse output even if command fails, as some data may still be available
+// If collect fails, return error
+// If collect succeeds, parse the output and update the SmartDataMap
+// Uses -n standby to avoid waking up sleeping disks, but bypasses standby mode
+// for initial data collection when no cached data exists
+func (sm *SmartManager) CollectSmart(deviceInfo *DeviceInfo) error {
+	// Check if we have any existing data for this device
+	hasExistingData := sm.hasDataForDevice(deviceInfo.Name)
+
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+
+	// Try with -n standby first if we have existing data
+	cmd := exec.CommandContext(ctx, "smartctl", "-aj", "-n", "standby", deviceInfo.Name)
+	output, err := cmd.CombinedOutput()
+
+	// Check if device is in standby (exit status 2)
+	if exitErr, ok := err.(*exec.ExitError); ok && exitErr.ExitCode() == 2 {
+		if hasExistingData {
+			// Device is in standby and we have cached data, keep using cache
+			slog.Debug("device in standby mode, using cached data", "device", deviceInfo.Name)
+			return nil
+		}
+		// No cached data, need to collect initial data by bypassing standby
+		slog.Debug("device in standby but no cached data, collecting initial data", "device", deviceInfo.Name)
+		ctx2, cancel2 := context.WithTimeout(context.Background(), 10*time.Second)
+		defer cancel2()
+		cmd = exec.CommandContext(ctx2, "smartctl", "-aj", deviceInfo.Name)
+		output, err = cmd.CombinedOutput()
+	}
+
+	hasValidData := false
+
+	switch deviceInfo.Type {
+	case "scsi", "sat", "ata":
+		// parse SATA/SCSI/ATA devices
+		hasValidData, _ = sm.parseSmartForSata(output)
+	case "nvme":
+		// parse nvme devices
+		hasValidData, _ = sm.parseSmartForNvme(output)
+	}
+
+	if !hasValidData {
+		if err != nil {
+			return err
+		}
+		return errNoValidSmartData
+	}
+	return nil
+}
+
+// hasDataForDevice checks if we have cached SMART data for a specific device
+func (sm *SmartManager) hasDataForDevice(deviceName string) bool {
+	sm.Lock()
+	defer sm.Unlock()
+
+	// Check if any cached data has this device name
+	for _, data := range sm.SmartDataMap {
+		if data != nil && data.DiskName == deviceName {
+			return true
+		}
+	}
+	return false
+}
+
+// parseScan parses the output of smartctl --scan -j and updates the SmartDevices slice
+func (sm *SmartManager) parseScan(output []byte) bool {
+	sm.Lock()
+	defer sm.Unlock()
+
+	sm.SmartDevices = make([]*DeviceInfo, 0)
+	scan := &scanOutput{}
+
+	if err := json.Unmarshal(output, scan); err != nil {
+		slog.Debug("Failed to parse smartctl scan JSON", "err", err)
+		return false
+	}
+
+	if len(scan.Devices) == 0 {
+		return false
+	}
+
+	scannedDeviceNameMap := make(map[string]bool, len(scan.Devices))
+
+	for _, device := range scan.Devices {
+		deviceInfo := &DeviceInfo{
+			Name:     device.Name,
+			Type:     device.Type,
+			InfoName: device.InfoName,
+			Protocol: device.Protocol,
+		}
+		sm.SmartDevices = append(sm.SmartDevices, deviceInfo)
+		scannedDeviceNameMap[device.Name] = true
+	}
+	// remove devices that are not in the scan
+	for key := range sm.SmartDataMap {
+		if _, ok := scannedDeviceNameMap[key]; !ok {
+			delete(sm.SmartDataMap, key)
+		}
+	}
+
+	return true
+}
+
+// isVirtualDevice checks if a device is a virtual disk that should be filtered out
+func (sm *SmartManager) isVirtualDevice(data *smart.SmartInfoForSata) bool {
+	vendorUpper := strings.ToUpper(data.ScsiVendor)
+	productUpper := strings.ToUpper(data.ScsiProduct)
+	modelUpper := strings.ToUpper(data.ModelName)
+
+	switch {
+	case strings.Contains(vendorUpper, "IET"), // iSCSI Enterprise Target
+		strings.Contains(productUpper, "VIRTUAL"),
+		strings.Contains(productUpper, "QEMU"),
+		strings.Contains(productUpper, "VBOX"),
+		strings.Contains(productUpper, "VMWARE"),
+		strings.Contains(vendorUpper, "MSFT"), // Microsoft Hyper-V
+		strings.Contains(modelUpper, "VIRTUAL"),
+		strings.Contains(modelUpper, "QEMU"),
+		strings.Contains(modelUpper, "VBOX"),
+		strings.Contains(modelUpper, "VMWARE"):
+		return true
+	default:
+		return false
+	}
+}
+
+// parseSmartForSata parses the output of smartctl --all -j for SATA/ATA devices and updates the SmartDataMap
+// Returns hasValidData and exitStatus
+func (sm *SmartManager) parseSmartForSata(output []byte) (bool, int) {
+	var data smart.SmartInfoForSata
+
+	if err := json.Unmarshal(output, &data); err != nil {
+		return false, 0
+	}
+
+	if data.SerialNumber == "" {
+		slog.Debug("device has no serial number, skipping", "device", data.Device.Name)
+		return false, data.Smartctl.ExitStatus
+	}
+
+	// Skip virtual devices (e.g., Kubernetes PVCs, QEMU, VirtualBox, etc.)
+	if sm.isVirtualDevice(&data) {
+		slog.Debug("skipping virtual device", "device", data.Device.Name, "model", data.ModelName)
+		return false, data.Smartctl.ExitStatus
+	}
+
+	sm.Lock()
+	defer sm.Unlock()
+
+	// get device name (e.g. /dev/sda)
+	keyName := data.SerialNumber
+
+	// if device does not exist in SmartDataMap, initialize it
+	if _, ok := sm.SmartDataMap[keyName]; !ok {
+		sm.SmartDataMap[keyName] = &smart.SmartData{}
+	}
+
+	// update SmartData
+	smartData := sm.SmartDataMap[keyName]
+	// smartData.ModelFamily = data.ModelFamily
+	smartData.ModelName = data.ModelName
+	smartData.SerialNumber = data.SerialNumber
+	smartData.FirmwareVersion = data.FirmwareVersion
+	smartData.Capacity = data.UserCapacity.Bytes
+	smartData.Temperature = data.Temperature.Current
+	smartData.SmartStatus = getSmartStatus(smartData.Temperature, data.SmartStatus.Passed)
+	smartData.DiskName = data.Device.Name
+	smartData.DiskType = data.Device.Type
+
+	// update SmartAttributes
+	smartData.Attributes = make([]*smart.SmartAttribute, 0, len(data.AtaSmartAttributes.Table))
+	for _, attr := range data.AtaSmartAttributes.Table {
+		smartAttr := &smart.SmartAttribute{
+			ID:         attr.ID,
+			Name:       attr.Name,
+			Value:      attr.Value,
+			Worst:      attr.Worst,
+			Threshold:  attr.Thresh,
+			RawValue:   attr.Raw.Value,
+			RawString:  attr.Raw.String,
+			WhenFailed: attr.WhenFailed,
+		}
+		smartData.Attributes = append(smartData.Attributes, smartAttr)
+	}
+	sm.SmartDataMap[keyName] = smartData
+
+	return true, data.Smartctl.ExitStatus
+}
+
+func getSmartStatus(temperature uint8, passed bool) string {
+	if passed {
+		return "PASSED"
+	} else if temperature > 0 {
+		return "FAILED"
+	} else {
+		return "UNKNOWN"
+	}
+}
+
+// parseSmartForNvme parses the output of smartctl --all -j /dev/nvmeX and updates the SmartDataMap
+// Returns hasValidData and exitStatus
+func (sm *SmartManager) parseSmartForNvme(output []byte) (bool, int) {
+	data := &smart.SmartInfoForNvme{}
+
+	if err := json.Unmarshal(output, &data); err != nil {
+		return false, 0
+	}
+
+	if data.SerialNumber == "" {
+		slog.Debug("device has no serial number, skipping", "device", data.Device.Name)
+		return false, data.Smartctl.ExitStatus
+	}
+
+	sm.Lock()
+	defer sm.Unlock()
+
+	// get device name (e.g. /dev/nvme0)
+	keyName := data.SerialNumber
+
+	// if device does not exist in SmartDataMap, initialize it
+	if _, ok := sm.SmartDataMap[keyName]; !ok {
+		sm.SmartDataMap[keyName] = &smart.SmartData{}
+	}
+
+	// update SmartData
+	smartData := sm.SmartDataMap[keyName]
+	smartData.ModelName = data.ModelName
+	smartData.SerialNumber = data.SerialNumber
+	smartData.FirmwareVersion = data.FirmwareVersion
+	smartData.Capacity = data.UserCapacity.Bytes
+	smartData.Temperature = data.NVMeSmartHealthInformationLog.Temperature
+	smartData.SmartStatus = getSmartStatus(smartData.Temperature, data.SmartStatus.Passed)
+	smartData.DiskName = data.Device.Name
+	smartData.DiskType = data.Device.Type
+
+	// nvme attributes does not follow the same format as ata attributes,
+	// so we manually map each field to SmartAttributes
+	log := data.NVMeSmartHealthInformationLog
+	smartData.Attributes = []*smart.SmartAttribute{
+		{Name: "CriticalWarning", RawValue: uint64(log.CriticalWarning)},
+		{Name: "Temperature", RawValue: uint64(log.Temperature)},
+		{Name: "AvailableSpare", RawValue: uint64(log.AvailableSpare)},
+		{Name: "AvailableSpareThreshold", RawValue: uint64(log.AvailableSpareThreshold)},
+		{Name: "PercentageUsed", RawValue: uint64(log.PercentageUsed)},
+		{Name: "DataUnitsRead", RawValue: log.DataUnitsRead},
+		{Name: "DataUnitsWritten", RawValue: log.DataUnitsWritten},
+		{Name: "HostReads", RawValue: uint64(log.HostReads)},
+		{Name: "HostWrites", RawValue: uint64(log.HostWrites)},
+		{Name: "ControllerBusyTime", RawValue: uint64(log.ControllerBusyTime)},
+		{Name: "PowerCycles", RawValue: uint64(log.PowerCycles)},
+		{Name: "PowerOnHours", RawValue: uint64(log.PowerOnHours)},
+		{Name: "UnsafeShutdowns", RawValue: uint64(log.UnsafeShutdowns)},
+		{Name: "MediaErrors", RawValue: uint64(log.MediaErrors)},
+		{Name: "NumErrLogEntries", RawValue: uint64(log.NumErrLogEntries)},
+		{Name: "WarningTempTime", RawValue: uint64(log.WarningTempTime)},
+		{Name: "CriticalCompTime", RawValue: uint64(log.CriticalCompTime)},
+	}
+
+	sm.SmartDataMap[keyName] = smartData
+
+	return true, data.Smartctl.ExitStatus
+}
+
+// detectSmartctl checks if smartctl is installed, returns an error if not
+func (sm *SmartManager) detectSmartctl() error {
+	if _, err := exec.LookPath("smartctl"); err == nil {
+		return nil
+	}
+	return fmt.Errorf("smartctl not found")
+}
+
+// NewSmartManager creates and initializes a new SmartManager
+func NewSmartManager() (*SmartManager, error) {
+	sm := &SmartManager{
+		SmartDataMap: make(map[string]*smart.SmartData),
+	}
+	if err := sm.detectSmartctl(); err != nil {
+		return nil, err
+	}
+
+	return sm, nil
+}

agent/system.go

@@ -0,0 +1,229 @@
+package agent
+
+import (
+	"bufio"
+	"fmt"
+	"log/slog"
+	"os"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/henrygd/beszel"
+	"github.com/henrygd/beszel/agent/battery"
+	"github.com/henrygd/beszel/internal/entities/system"
+
+	"github.com/shirou/gopsutil/v4/cpu"
+	"github.com/shirou/gopsutil/v4/host"
+	"github.com/shirou/gopsutil/v4/load"
+	"github.com/shirou/gopsutil/v4/mem"
+)
+
+// prevDisk stores previous per-device disk counters for a given cache interval
+type prevDisk struct {
+	readBytes  uint64
+	writeBytes uint64
+	at         time.Time
+}
+
+// Sets initial / non-changing values about the host system
+func (a *Agent) initializeSystemInfo() {
+	a.systemInfo.AgentVersion = beszel.Version
+	a.systemInfo.Hostname, _ = os.Hostname()
+
+	platform, _, version, _ := host.PlatformInformation()
+
+	if platform == "darwin" {
+		a.systemInfo.KernelVersion = version
+		a.systemInfo.Os = system.Darwin
+	} else if strings.Contains(platform, "indows") {
+		a.systemInfo.KernelVersion = fmt.Sprintf("%s %s", strings.Replace(platform, "Microsoft ", "", 1), version)
+		a.systemInfo.Os = system.Windows
+	} else if platform == "freebsd" {
+		a.systemInfo.Os = system.Freebsd
+		a.systemInfo.KernelVersion = version
+	} else {
+		a.systemInfo.Os = system.Linux
+	}
+
+	if a.systemInfo.KernelVersion == "" {
+		a.systemInfo.KernelVersion, _ = host.KernelVersion()
+	}
+
+	// cpu model
+	if info, err := cpu.Info(); err == nil && len(info) > 0 {
+		a.systemInfo.CpuModel = info[0].ModelName
+	}
+	// cores / threads
+	a.systemInfo.Cores, _ = cpu.Counts(false)
+	if threads, err := cpu.Counts(true); err == nil {
+		if threads > 0 && threads < a.systemInfo.Cores {
+			// in lxc logical cores reflects container limits, so use that as cores if lower
+			a.systemInfo.Cores = threads
+		} else {
+			a.systemInfo.Threads = threads
+		}
+	}
+
+	// zfs
+	if _, err := getARCSize(); err != nil {
+		slog.Debug("Not monitoring ZFS ARC", "err", err)
+	} else {
+		a.zfs = true
+	}
+}
+
+// Returns current info, stats about the host system
+func (a *Agent) getSystemStats(cacheTimeMs uint16) system.Stats {
+	var systemStats system.Stats
+
+	// battery
+	if batteryPercent, batteryState, err := battery.GetBatteryStats(); err == nil {
+		systemStats.Battery[0] = batteryPercent
+		systemStats.Battery[1] = batteryState
+	}
+
+	// cpu percent
+	cpuPercent, err := getCpuPercent(cacheTimeMs)
+	if err == nil {
+		systemStats.Cpu = twoDecimals(cpuPercent)
+	} else {
+		slog.Error("Error getting cpu percent", "err", err)
+	}
+
+	// load average
+	if avgstat, err := load.Avg(); err == nil {
+		systemStats.LoadAvg[0] = avgstat.Load1
+		systemStats.LoadAvg[1] = avgstat.Load5
+		systemStats.LoadAvg[2] = avgstat.Load15
+		slog.Debug("Load average", "5m", avgstat.Load5, "15m", avgstat.Load15)
+	} else {
+		slog.Error("Error getting load average", "err", err)
+	}
+
+	// memory
+	if v, err := mem.VirtualMemory(); err == nil {
+		// swap
+		systemStats.Swap = bytesToGigabytes(v.SwapTotal)
+		systemStats.SwapUsed = bytesToGigabytes(v.SwapTotal - v.SwapFree - v.SwapCached)
+		// cache + buffers value for default mem calculation
+		// note: gopsutil automatically adds SReclaimable to v.Cached
+		cacheBuff := v.Cached + v.Buffers - v.Shared
+		if cacheBuff <= 0 {
+			cacheBuff = max(v.Total-v.Free-v.Used, 0)
+		}
+		// htop memory calculation overrides (likely outdated as of mid 2025)
+		if a.memCalc == "htop" {
+			// cacheBuff = v.Cached + v.Buffers - v.Shared
+			v.Used = v.Total - (v.Free + cacheBuff)
+			v.UsedPercent = float64(v.Used) / float64(v.Total) * 100.0
+		}
+		// if a.memCalc == "legacy" {
+		// 	v.Used = v.Total - v.Free - v.Buffers - v.Cached
+		// 	cacheBuff = v.Total - v.Free - v.Used
+		// 	v.UsedPercent = float64(v.Used) / float64(v.Total) * 100.0
+		// }
+		// subtract ZFS ARC size from used memory and add as its own category
+		if a.zfs {
+			if arcSize, _ := getARCSize(); arcSize > 0 && arcSize < v.Used {
+				v.Used = v.Used - arcSize
+				v.UsedPercent = float64(v.Used) / float64(v.Total) * 100.0
+				systemStats.MemZfsArc = bytesToGigabytes(arcSize)
+			}
+		}
+		systemStats.Mem = bytesToGigabytes(v.Total)
+		systemStats.MemBuffCache = bytesToGigabytes(cacheBuff)
+		systemStats.MemUsed = bytesToGigabytes(v.Used)
+		systemStats.MemPct = twoDecimals(v.UsedPercent)
+	}
+
+	// disk usage
+	a.updateDiskUsage(&systemStats)
+
+	// disk i/o (cache-aware per interval)
+	a.updateDiskIo(cacheTimeMs, &systemStats)
+
+	// network stats (per cache interval)
+	a.updateNetworkStats(cacheTimeMs, &systemStats)
+
+	// temperatures
+	// TODO: maybe refactor to methods on systemStats
+	a.updateTemperatures(&systemStats)
+
+	// GPU data
+	if a.gpuManager != nil {
+		// reset high gpu percent
+		a.systemInfo.GpuPct = 0
+		// get current GPU data
+		if gpuData := a.gpuManager.GetCurrentData(cacheTimeMs); len(gpuData) > 0 {
+			systemStats.GPUData = gpuData
+
+			// add temperatures
+			if systemStats.Temperatures == nil {
+				systemStats.Temperatures = make(map[string]float64, len(gpuData))
+			}
+			highestTemp := 0.0
+			for _, gpu := range gpuData {
+				if gpu.Temperature > 0 {
+					systemStats.Temperatures[gpu.Name] = gpu.Temperature
+					if a.sensorConfig.primarySensor == gpu.Name {
+						a.systemInfo.DashboardTemp = gpu.Temperature
+					}
+					if gpu.Temperature > highestTemp {
+						highestTemp = gpu.Temperature
+					}
+				}
+				// update high gpu percent for dashboard
+				a.systemInfo.GpuPct = max(a.systemInfo.GpuPct, gpu.Usage)
+			}
+			// use highest temp for dashboard temp if dashboard temp is unset
+			if a.systemInfo.DashboardTemp == 0 {
+				a.systemInfo.DashboardTemp = highestTemp
+			}
+		}
+	}
+
+	// update base system info
+	a.systemInfo.ConnectionType = a.connectionManager.ConnectionType
+	a.systemInfo.Cpu = systemStats.Cpu
+	a.systemInfo.LoadAvg = systemStats.LoadAvg
+	// TODO: remove these in future release in favor of load avg array
+	a.systemInfo.LoadAvg1 = systemStats.LoadAvg[0]
+	a.systemInfo.LoadAvg5 = systemStats.LoadAvg[1]
+	a.systemInfo.LoadAvg15 = systemStats.LoadAvg[2]
+	a.systemInfo.MemPct = systemStats.MemPct
+	a.systemInfo.DiskPct = systemStats.DiskPct
+	a.systemInfo.Uptime, _ = host.Uptime()
+	// TODO: in future release, remove MB bandwidth values in favor of bytes
+	a.systemInfo.Bandwidth = twoDecimals(systemStats.NetworkSent + systemStats.NetworkRecv)
+	a.systemInfo.BandwidthBytes = systemStats.Bandwidth[0] + systemStats.Bandwidth[1]
+	slog.Debug("sysinfo", "data", a.systemInfo)
+
+	return systemStats
+}
+
+// Returns the size of the ZFS ARC memory cache in bytes
+func getARCSize() (uint64, error) {
+	file, err := os.Open("/proc/spl/kstat/zfs/arcstats")
+	if err != nil {
+		return 0, err
+	}
+	defer file.Close()
+
+	// Scan the lines
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		line := scanner.Text()
+		if strings.HasPrefix(line, "size") {
+			// Example line: size 4 15032385536
+			fields := strings.Fields(line)
+			if len(fields) < 3 {
+				return 0, err
+			}
+			// Return the size as uint64
+			return strconv.ParseUint(fields[2], 10, 64)
+		}
+	}
+
+	return 0, fmt.Errorf("failed to parse size field")
+}

agent/test-data/container.json

@@ -0,0 +1,24 @@
+{
+	"cpu_stats": {
+		"cpu_usage": {
+			"total_usage": 312055276000
+		},
+		"system_cpu_usage": 1366399830000000
+	},
+	"memory_stats": {
+		"usage": 507400192,
+		"stats": {
+			"inactive_file": 165130240
+		}
+	},
+	"networks": {
+		"eth0": {
+			"tx_bytes": 20376558,
+			"rx_bytes": 537029455
+		},
+		"eth1": {
+			"tx_bytes": 2003766,
+			"rx_bytes": 6241
+		}
+	}
+}

agent/test-data/container2.json

@@ -0,0 +1,24 @@
+{
+	"cpu_stats": {
+		"cpu_usage": {
+			"total_usage": 314891801000
+		},
+		"system_cpu_usage": 1368474900000000
+	},
+	"memory_stats": {
+		"usage": 507400192,
+		"stats": {
+			"inactive_file": 165130240
+		}
+	},
+	"networks": {
+		"eth0": {
+			"tx_bytes": 20376558,
+			"rx_bytes": 537029455
+		},
+		"eth1": {
+			"tx_bytes": 2003766,
+			"rx_bytes": 6241
+		}
+	}
+}

agent/types.go

@@ -1,156 +0,0 @@
-package main
-
-import "time"
-
-type SystemData struct {
-	Stats      *SystemStats      `json:"stats"`
-	Info       *SystemInfo       `json:"info"`
-	Containers []*ContainerStats `json:"container"`
-}
-
-type SystemInfo struct {
-	Cores    int    `json:"c"`
-	Threads  int    `json:"t"`
-	CpuModel string `json:"m"`
-	// Os       string  `json:"o"`
-	Uptime  uint64  `json:"u"`
-	Cpu     float64 `json:"cpu"`
-	MemPct  float64 `json:"mp"`
-	DiskPct float64 `json:"dp"`
-}
-
-type SystemStats struct {
-	Cpu          float64 `json:"cpu"`
-	Mem          float64 `json:"m"`
-	MemUsed      float64 `json:"mu"`
-	MemPct       float64 `json:"mp"`
-	MemBuffCache float64 `json:"mb"`
-	Disk         float64 `json:"d"`
-	DiskUsed     float64 `json:"du"`
-	DiskPct      float64 `json:"dp"`
-	DiskRead     float64 `json:"dr"`
-	DiskWrite    float64 `json:"dw"`
-	NetworkSent  float64 `json:"ns"`
-	NetworkRecv  float64 `json:"nr"`
-}
-
-type ContainerStats struct {
-	Name string  `json:"n"`
-	Cpu  float64 `json:"c"`
-	Mem  float64 `json:"m"`
-	// MemPct float64 `json:"mp"`
-}
-
-type Container struct {
-	ID      string `json:"Id"`
-	IdShort string
-	Names   []string
-	Image   string
-	ImageID string
-	Command string
-	Created int64
-	// Ports      []Port
-	SizeRw     int64 `json:",omitempty"`
-	SizeRootFs int64 `json:",omitempty"`
-	Labels     map[string]string
-	State      string
-	Status     string
-	HostConfig struct {
-		NetworkMode string            `json:",omitempty"`
-		Annotations map[string]string `json:",omitempty"`
-	}
-	// NetworkSettings *SummaryNetworkSettings
-	// Mounts          []MountPoint
-}
-
-type CStats struct {
-	// Common stats
-	Read    time.Time `json:"read"`
-	PreRead time.Time `json:"preread"`
-
-	// Linux specific stats, not populated on Windows.
-	// PidsStats  PidsStats  `json:"pids_stats,omitempty"`
-	// BlkioStats BlkioStats `json:"blkio_stats,omitempty"`
-
-	// Windows specific stats, not populated on Linux.
-	NumProcs uint32 `json:"num_procs"`
-	// StorageStats StorageStats `json:"storage_stats,omitempty"`
-
-	// Shared stats
-	CPUStats    CPUStats    `json:"cpu_stats,omitempty"`
-	PreCPUStats CPUStats    `json:"precpu_stats,omitempty"` // "Pre"="Previous"
-	MemoryStats MemoryStats `json:"memory_stats,omitempty"`
-}
-
-type CPUStats struct {
-	// CPU Usage. Linux and Windows.
-	CPUUsage CPUUsage `json:"cpu_usage"`
-
-	// System Usage. Linux only.
-	SystemUsage uint64 `json:"system_cpu_usage,omitempty"`
-
-	// Online CPUs. Linux only.
-	OnlineCPUs uint32 `json:"online_cpus,omitempty"`
-
-	// Throttling Data. Linux only.
-	// ThrottlingData ThrottlingData `json:"throttling_data,omitempty"`
-}
-
-type CPUUsage struct {
-	// Total CPU time consumed.
-	// Units: nanoseconds (Linux)
-	// Units: 100's of nanoseconds (Windows)
-	TotalUsage uint64 `json:"total_usage"`
-
-	// Total CPU time consumed per core (Linux). Not used on Windows.
-	// Units: nanoseconds.
-	PercpuUsage []uint64 `json:"percpu_usage,omitempty"`
-
-	// Time spent by tasks of the cgroup in kernel mode (Linux).
-	// Time spent by all container processes in kernel mode (Windows).
-	// Units: nanoseconds (Linux).
-	// Units: 100's of nanoseconds (Windows). Not populated for Hyper-V Containers.
-	UsageInKernelmode uint64 `json:"usage_in_kernelmode"`
-
-	// Time spent by tasks of the cgroup in user mode (Linux).
-	// Time spent by all container processes in user mode (Windows).
-	// Units: nanoseconds (Linux).
-	// Units: 100's of nanoseconds (Windows). Not populated for Hyper-V Containers
-	UsageInUsermode uint64 `json:"usage_in_usermode"`
-}
-
-type MemoryStats struct {
-
-	// current res_counter usage for memory
-	Usage uint64 `json:"usage,omitempty"`
-	Cache uint64 `json:"cache,omitempty"`
-	// maximum usage ever recorded.
-	MaxUsage uint64 `json:"max_usage,omitempty"`
-	// TODO(vishh): Export these as stronger types.
-	// all the stats exported via memory.stat.
-	Stats map[string]uint64 `json:"stats,omitempty"`
-	// number of times memory usage hits limits.
-	Failcnt uint64 `json:"failcnt,omitempty"`
-	Limit   uint64 `json:"limit,omitempty"`
-
-	// committed bytes
-	Commit uint64 `json:"commitbytes,omitempty"`
-	// peak committed bytes
-	CommitPeak uint64 `json:"commitpeakbytes,omitempty"`
-	// private working set
-	PrivateWorkingSet uint64 `json:"privateworkingset,omitempty"`
-}
-
-type DiskIoStats struct {
-	Read       uint64
-	Write      uint64
-	Time       time.Time
-	Filesystem string
-}
-
-type NetIoStats struct {
-	BytesRecv uint64
-	BytesSent uint64
-	Time      time.Time
-	Name      string
-}

agent/update.go

@@ -1,54 +1,168 @@
-package main
+package agent
 
 import (
 	"fmt"
+	"log"
 	"os"
+	"os/exec"
+	"runtime"
 	"strings"
 
-	"github.com/blang/semver"
-	"github.com/rhysd/go-github-selfupdate/selfupdate"
+	"github.com/henrygd/beszel/internal/ghupdate"
 )
 
-func updateBeszel() {
-	var latest *selfupdate.Release
-	var found bool
-	var err error
-	currentVersion := semver.MustParse(Version)
-	fmt.Println("beszel-agent", currentVersion)
-	fmt.Println("Checking for updates...")
-	updater, _ := selfupdate.NewUpdater(selfupdate.Config{
-		Filters: []string{"beszel-agent"},
-	})
-	latest, found, err = updater.DetectLatest("henrygd/beszel")
-
-	if err != nil {
-		fmt.Println("Error checking for updates:", err)
-		os.Exit(1)
-	}
-
-	if !found {
-		fmt.Println("No updates found")
-		os.Exit(0)
-	}
-
-	fmt.Println("Latest version:", latest.Version)
-
-	if latest.Version.LTE(currentVersion) {
-		fmt.Println("You are up to date")
-		return
-	}
-
-	var binaryPath string
-	fmt.Printf("Updating from %s to %s...\n", currentVersion, latest.Version)
-	binaryPath, err = os.Executable()
-	if err != nil {
-		fmt.Println("Error getting binary path:", err)
-		os.Exit(1)
-	}
-	err = selfupdate.UpdateTo(latest.AssetURL, binaryPath)
-	if err != nil {
-		fmt.Println("Please try rerunning with sudo. Error:", err)
-		os.Exit(1)
-	}
-	fmt.Printf("Successfully updated to %s\n\n%s\n", latest.Version, strings.TrimSpace(latest.ReleaseNotes))
+// restarter knows how to restart the beszel-agent service.
+type restarter interface {
+	Restart() error
+}
+
+type systemdRestarter struct{ cmd string }
+
+func (s *systemdRestarter) Restart() error {
+	// Only restart if the service is active
+	if err := exec.Command(s.cmd, "is-active", "beszel-agent.service").Run(); err != nil {
+		return nil
+	}
+	ghupdate.ColorPrint(ghupdate.ColorYellow, "Restarting beszel-agent.service via systemd…")
+	return exec.Command(s.cmd, "restart", "beszel-agent.service").Run()
+}
+
+type openRCRestarter struct{ cmd string }
+
+func (o *openRCRestarter) Restart() error {
+	if err := exec.Command(o.cmd, "beszel-agent", "status").Run(); err != nil {
+		return nil
+	}
+	ghupdate.ColorPrint(ghupdate.ColorYellow, "Restarting beszel-agent via OpenRC…")
+	return exec.Command(o.cmd, "beszel-agent", "restart").Run()
+}
+
+type openWRTRestarter struct{ cmd string }
+
+func (w *openWRTRestarter) Restart() error {
+	// https://openwrt.org/docs/guide-user/base-system/managing_services?s[]=service
+	if err := exec.Command("/etc/init.d/beszel-agent", "running").Run(); err != nil {
+		return nil
+	}
+	ghupdate.ColorPrint(ghupdate.ColorYellow, "Restarting beszel-agent via procd…")
+	return exec.Command("/etc/init.d/beszel-agent", "restart").Run()
+}
+
+type freeBSDRestarter struct{ cmd string }
+
+func (f *freeBSDRestarter) Restart() error {
+	if err := exec.Command(f.cmd, "beszel-agent", "status").Run(); err != nil {
+		return nil
+	}
+	ghupdate.ColorPrint(ghupdate.ColorYellow, "Restarting beszel-agent via FreeBSD rc…")
+	return exec.Command(f.cmd, "beszel-agent", "restart").Run()
+}
+
+func detectRestarter() restarter {
+	if path, err := exec.LookPath("systemctl"); err == nil {
+		return &systemdRestarter{cmd: path}
+	}
+	if path, err := exec.LookPath("rc-service"); err == nil {
+		return &openRCRestarter{cmd: path}
+	}
+    if path, err := exec.LookPath("procd"); err == nil {
+        return &openWRTRestarter{cmd: path}
+    }
+	if path, err := exec.LookPath("service"); err == nil {
+		if runtime.GOOS == "freebsd" {
+			return &freeBSDRestarter{cmd: path}
+		}
+	}
+	return nil
+}
+
+// Update checks GitHub for a newer release of beszel-agent, applies it,
+// fixes SELinux context if needed, and restarts the service.
+func Update(useMirror bool) error {
+	exePath, _ := os.Executable()
+
+	dataDir, err := getDataDir()
+	if err != nil {
+		dataDir = os.TempDir()
+	}
+	updated, err := ghupdate.Update(ghupdate.Config{
+		ArchiveExecutable: "beszel-agent",
+		DataDir:           dataDir,
+		UseMirror:         useMirror,
+	})
+	if err != nil {
+		log.Fatal(err)
+	}
+	if !updated {
+		return nil
+	}
+
+	// make sure the file is executable
+	if err := os.Chmod(exePath, 0755); err != nil {
+		ghupdate.ColorPrintf(ghupdate.ColorYellow, "Warning: failed to set executable permissions: %v", err)
+	}
+	// set ownership to beszel:beszel if possible
+	if chownPath, err := exec.LookPath("chown"); err == nil {
+		if err := exec.Command(chownPath, "beszel:beszel", exePath).Run(); err != nil {
+			ghupdate.ColorPrintf(ghupdate.ColorYellow, "Warning: failed to set file ownership: %v", err)
+		}
+	}
+
+	// 6) Fix SELinux context if necessary
+	if err := handleSELinuxContext(exePath); err != nil {
+		ghupdate.ColorPrintf(ghupdate.ColorYellow, "Warning: SELinux context handling: %v", err)
+	}
+
+	// 7) Restart service if running under a recognised init system
+	if r := detectRestarter(); r != nil {
+		if err := r.Restart(); err != nil {
+			ghupdate.ColorPrintf(ghupdate.ColorYellow, "Warning: failed to restart service: %v", err)
+			ghupdate.ColorPrint(ghupdate.ColorYellow, "Please restart the service manually.")
+		} else {
+			ghupdate.ColorPrint(ghupdate.ColorGreen, "Service restarted successfully")
+		}
+	} else {
+		ghupdate.ColorPrint(ghupdate.ColorYellow, "No supported init system detected; please restart manually if needed.")
+	}
+
+	return nil
+}
+
+// handleSELinuxContext restores or applies the correct SELinux label to the binary.
+func handleSELinuxContext(path string) error {
+	out, err := exec.Command("getenforce").Output()
+	if err != nil {
+		// SELinux not enabled or getenforce not available
+		return nil
+	}
+	state := strings.TrimSpace(string(out))
+	if state == "Disabled" {
+		return nil
+	}
+
+	ghupdate.ColorPrint(ghupdate.ColorYellow, "SELinux is enabled; applying context…")
+	var errs []string
+
+	// Try persistent context via semanage+restorecon
+	if semanagePath, err := exec.LookPath("semanage"); err == nil {
+		if err := exec.Command(semanagePath, "fcontext", "-a", "-t", "bin_t", path).Run(); err != nil {
+			errs = append(errs, "semanage fcontext failed: "+err.Error())
+		} else if restoreconPath, err := exec.LookPath("restorecon"); err == nil {
+			if err := exec.Command(restoreconPath, "-v", path).Run(); err != nil {
+				errs = append(errs, "restorecon failed: "+err.Error())
+			}
+		}
+	}
+
+	// Fallback to temporary context via chcon
+	if chconPath, err := exec.LookPath("chcon"); err == nil {
+		if err := exec.Command(chconPath, "-t", "bin_t", path).Run(); err != nil {
+			errs = append(errs, "chcon failed: "+err.Error())
+		}
+	}
+
+	if len(errs) > 0 {
+		return fmt.Errorf("SELinux context errors: %s", strings.Join(errs, "; "))
+	}
+	return nil
 }

agent/utils.go

@@ -0,0 +1,15 @@
+package agent
+
+import "math"
+
+func bytesToMegabytes(b float64) float64 {
+	return twoDecimals(b / 1048576)
+}
+
+func bytesToGigabytes(b uint64) float64 {
+	return twoDecimals(float64(b) / 1073741824)
+}
+
+func twoDecimals(value float64) float64 {
+	return math.Round(value*100) / 100
+}

beszel.go

@@ -0,0 +1,18 @@
+// Package beszel provides core application constants and version information
+// which are used throughout the application.
+package beszel
+
+import "github.com/blang/semver"
+
+const (
+	// Version is the current version of the application.
+	Version = "0.15.0"
+	// AppName is the name of the application.
+	AppName = "beszel"
+)
+
+// MinVersionCbor is the minimum supported version for CBOR compatibility.
+var MinVersionCbor = semver.MustParse("0.12.0")
+
+// MinVersionAgentResponse is the minimum supported version for AgentResponse compatibility.
+var MinVersionAgentResponse = semver.MustParse("0.13.0")

go.mod

@@ -0,0 +1,66 @@
+module github.com/henrygd/beszel
+
+go 1.25.3
+
+require (
+	github.com/blang/semver v3.5.1+incompatible
+	github.com/distatus/battery v0.11.0
+	github.com/fxamacker/cbor/v2 v2.9.0
+	github.com/gliderlabs/ssh v0.3.8
+	github.com/google/uuid v1.6.0
+	github.com/lxzan/gws v1.8.9
+	github.com/nicholas-fedor/shoutrrr v0.11.0
+	github.com/pocketbase/dbx v1.11.0
+	github.com/pocketbase/pocketbase v0.31.0
+	github.com/shirou/gopsutil/v4 v4.25.9
+	github.com/spf13/cast v1.10.0
+	github.com/spf13/cobra v1.10.1
+	github.com/spf13/pflag v1.0.10
+	github.com/stretchr/testify v1.11.1
+	golang.org/x/crypto v0.43.0
+	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546
+	gopkg.in/yaml.v3 v3.0.1
+)
+
+require (
+	github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be // indirect
+	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/disintegration/imaging v1.6.2 // indirect
+	github.com/dolthub/maphash v0.1.0 // indirect
+	github.com/domodwyer/mailyak/v3 v3.6.2 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/ebitengine/purego v0.9.0 // indirect
+	github.com/fatih/color v1.18.0 // indirect
+	github.com/gabriel-vasile/mimetype v1.4.10 // indirect
+	github.com/ganigeorgiev/fexpr v0.5.0 // indirect
+	github.com/go-ole/go-ole v1.3.0 // indirect
+	github.com/go-ozzo/ozzo-validation/v4 v4.3.0 // indirect
+	github.com/go-sql-driver/mysql v1.9.1 // indirect
+	github.com/golang-jwt/jwt/v5 v5.3.0 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/klauspost/compress v1.18.1 // indirect
+	github.com/lufia/plan9stats v0.0.0-20251013123823-9fd1530e3ec3 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/power-devops/perfstat v0.0.0-20240221224432-82ca36839d55 // indirect
+	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	github.com/tklauser/go-sysconf v0.3.15 // indirect
+	github.com/tklauser/numcpus v0.10.0 // indirect
+	github.com/x448/float16 v0.8.4 // indirect
+	github.com/yusufpapurcu/wmi v1.2.4 // indirect
+	golang.org/x/image v0.32.0 // indirect
+	golang.org/x/net v0.46.0 // indirect
+	golang.org/x/oauth2 v0.32.0 // indirect
+	golang.org/x/sync v0.17.0 // indirect
+	golang.org/x/sys v0.37.0 // indirect
+	golang.org/x/term v0.36.0 // indirect
+	golang.org/x/text v0.30.0 // indirect
+	howett.net/plist v1.0.1 // indirect
+	modernc.org/libc v1.66.10 // indirect
+	modernc.org/mathutil v1.7.1 // indirect
+	modernc.org/memory v1.11.0 // indirect
+	modernc.org/sqlite v1.39.1 // indirect
+)

go.sum

@@ -0,0 +1,197 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/Masterminds/semver/v3 v3.4.0 h1:Zog+i5UMtVoCU8oKka5P7i9q9HgrJeGzI9SA1Xbatp0=
+github.com/Masterminds/semver/v3 v3.4.0/go.mod h1:4V+yj/TJE1HU9XfppCwVMZq3I84lprf4nC11bSS5beM=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be h1:9AeTilPcZAjCFIImctFaOjnTIavg87rW78vTPkQqLI8=
+github.com/anmitsu/go-shlex v0.0.0-20200514113438-38f4b401e2be/go.mod h1:ySMOLuWl6zY27l47sB3qLNK6tF2fkHG55UZxx8oIVo4=
+github.com/asaskevich/govalidator v0.0.0-20200108200545-475eaeb16496/go.mod h1:oGkLhpf+kjZl6xBf758TQhh5XrAeiJv/7FRz/2spLIg=
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
+github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
+github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
+github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
+github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/disintegration/imaging v1.6.2 h1:w1LecBlG2Lnp8B3jk5zSuNqd7b4DXhcjwek1ei82L+c=
+github.com/disintegration/imaging v1.6.2/go.mod h1:44/5580QXChDfwIclfc/PCwrr44amcmDAg8hxG0Ewe4=
+github.com/distatus/battery v0.11.0 h1:KJk89gz90Iq/wJtbjjM9yUzBXV+ASV/EG2WOOL7N8lc=
+github.com/distatus/battery v0.11.0/go.mod h1:KmVkE8A8hpIX4T78QRdMktYpEp35QfOL8A8dwZBxq2k=
+github.com/dolthub/maphash v0.1.0 h1:bsQ7JsF4FkkWyrP3oCnFJgrCUAFbFf3kOl4L/QxPDyQ=
+github.com/dolthub/maphash v0.1.0/go.mod h1:gkg4Ch4CdCDu5h6PMriVLawB7koZ+5ijb9puGMV50a4=
+github.com/domodwyer/mailyak/v3 v3.6.2 h1:x3tGMsyFhTCaxp6ycgR0FE/bu5QiNp+hetUuCOBXMn8=
+github.com/domodwyer/mailyak/v3 v3.6.2/go.mod h1:lOm/u9CyCVWHeaAmHIdF4RiKVxKUT/H5XX10lIKAL6c=
+github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
+github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
+github.com/ebitengine/purego v0.9.0 h1:mh0zpKBIXDceC63hpvPuGLiJ8ZAa3DfrFTudmfi8A4k=
+github.com/ebitengine/purego v0.9.0/go.mod h1:iIjxzd6CiRiOG0UyXP+V1+jWqUXVjPKLAI0mRfJZTmQ=
+github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
+github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
+github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
+github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
+github.com/fxamacker/cbor/v2 v2.9.0 h1:NpKPmjDBgUfBms6tr6JZkTHtfFGcMKsw3eGcmD/sapM=
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+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+howett.net/plist v1.0.1 h1:37GdZ8tP09Q35o9ych3ehygcsL+HqKSwzctveSlarvM=
+howett.net/plist v1.0.1/go.mod h1:lqaXoTrLY4hg8tnEzNru53gicrbv7rrk+2xJA/7hw9g=
+modernc.org/cc/v4 v4.26.5 h1:xM3bX7Mve6G8K8b+T11ReenJOT+BmVqQj0FY5T4+5Y4=
+modernc.org/cc/v4 v4.26.5/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
+modernc.org/ccgo/v4 v4.28.1 h1:wPKYn5EC/mYTqBO373jKjvX2n+3+aK7+sICCv4Fjy1A=
+modernc.org/ccgo/v4 v4.28.1/go.mod h1:uD+4RnfrVgE6ec9NGguUNdhqzNIeeomeXf6CL0GTE5Q=
+modernc.org/fileutil v1.3.40 h1:ZGMswMNc9JOCrcrakF1HrvmergNLAmxOPjizirpfqBA=
+modernc.org/fileutil v1.3.40/go.mod h1:HxmghZSZVAz/LXcMNwZPA/DRrQZEVP9VX0V4LQGQFOc=
+modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
+modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
+modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
+modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
+modernc.org/libc v1.66.10 h1:yZkb3YeLx4oynyR+iUsXsybsX4Ubx7MQlSYEw4yj59A=
+modernc.org/libc v1.66.10/go.mod h1:8vGSEwvoUoltr4dlywvHqjtAqHBaw0j1jI7iFBTAr2I=
+modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
+modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
+modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
+modernc.org/memory v1.11.0/go.mod h1:/JP4VbVC+K5sU2wZi9bHoq2MAkCnrt2r98UGeSK7Mjw=
+modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
+modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
+modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
+modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
+modernc.org/sqlite v1.39.1 h1:H+/wGFzuSCIEVCvXYVHX5RQglwhMOvtHSv+VtidL2r4=
+modernc.org/sqlite v1.39.1/go.mod h1:9fjQZ0mB1LLP0GYrp39oOJXx/I2sxEnZtzCmEQIKvGE=
+modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
+modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
+modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=
+modernc.org/token v1.1.0/go.mod h1:UGzOrNV1mAFSEB63lOFHIpNRUVMvYTc6yu1SMY/XTDM=

hub/.goreleaser.yml

@@ -1,36 +0,0 @@
-# version: 1
-
-project_name: beszel
-
-before:
-  hooks:
-    - go mod tidy
-
-builds:
-  - env:
-      - CGO_ENABLED=0
-    goos:
-      - linux
-      - darwin
-    goarch:
-      - amd64
-      - arm64
-
-archives:
-  - format: tar.gz
-    name_template: >-
-      {{ .ProjectName }}_
-      {{- .Os }}_
-      {{- .Arch }}
-    # use zip for windows archives
-    # format_overrides:
-    #   - goos: windows
-    #     format: zip
-
-changelog:
-  disable: true
-  sort: asc
-  filters:
-    exclude:
-      - '^docs:'
-      - '^test:'

hub/alerts.go

@@ -1,142 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"net/mail"
-
-	"github.com/pocketbase/dbx"
-	"github.com/pocketbase/pocketbase/models"
-	"github.com/pocketbase/pocketbase/tools/mailer"
-	"github.com/pocketbase/pocketbase/tools/types"
-)
-
-func handleSystemAlerts(newStatus string, newRecord *models.Record, oldRecord *models.Record) {
-	alertRecords, err := app.Dao().FindRecordsByExpr("alerts",
-		dbx.NewExp("system = {:system}", dbx.Params{"system": oldRecord.Get("id")}),
-	)
-	if err != nil || len(alertRecords) == 0 {
-		// log.Println("no alerts found for system")
-		return
-	}
-	// log.Println("found alerts", len(alertRecords))
-	var systemInfo *SystemInfo
-	for _, alertRecord := range alertRecords {
-		name := alertRecord.Get("name").(string)
-		switch name {
-		case "Status":
-			handleStatusAlerts(newStatus, oldRecord, alertRecord)
-		case "CPU", "Memory", "Disk":
-			if newStatus != "up" {
-				continue
-			}
-			if systemInfo == nil {
-				systemInfo = getSystemInfo(newRecord)
-			}
-			if name == "CPU" {
-				handleSlidingValueAlert(newRecord, alertRecord, name, systemInfo.Cpu)
-			} else if name == "Memory" {
-				handleSlidingValueAlert(newRecord, alertRecord, name, systemInfo.MemPct)
-			} else if name == "Disk" {
-				handleSlidingValueAlert(newRecord, alertRecord, name, systemInfo.DiskPct)
-			}
-		}
-	}
-}
-
-func getSystemInfo(record *models.Record) *SystemInfo {
-	var SystemInfo SystemInfo
-	json.Unmarshal([]byte(record.Get("info").(types.JsonRaw)), &SystemInfo)
-	return &SystemInfo
-}
-
-func handleSlidingValueAlert(newRecord *models.Record, alertRecord *models.Record, name string, curValue float64) {
-	triggered := alertRecord.Get("triggered").(bool)
-	threshold := alertRecord.Get("value").(float64)
-	// fmt.Println(name, curValue, "threshold", threshold, "triggered", triggered)
-	var subject string
-	var body string
-	if !triggered && curValue > threshold {
-		alertRecord.Set("triggered", true)
-		systemName := newRecord.Get("name").(string)
-		subject = fmt.Sprintf("%s usage threshold exceeded on %s", name, systemName)
-		body = fmt.Sprintf("%s usage on %s is %.1f%%.\n\n- Beszel", name, systemName, curValue)
-	} else if triggered && curValue <= threshold {
-		alertRecord.Set("triggered", false)
-		systemName := newRecord.Get("name").(string)
-		subject = fmt.Sprintf("%s usage returned below threshold on %s", name, systemName)
-		body = fmt.Sprintf("%s usage on %s is below threshold at %.1f%%.\n\n%s\n\n- Beszel", name, systemName, curValue, app.Settings().Meta.AppUrl+"/system/"+systemName)
-	} else {
-		// fmt.Println(name, "not triggered")
-		return
-	}
-	if err := app.Dao().SaveRecord(alertRecord); err != nil {
-		// app.Logger().Error("failed to save alert record", "err", err.Error())
-		return
-	}
-	// expand the user relation and send the alert
-	if errs := app.Dao().ExpandRecord(alertRecord, []string{"user"}, nil); len(errs) > 0 {
-		// app.Logger().Error("failed to expand user relation", "errs", errs)
-		return
-	}
-	if user := alertRecord.ExpandedOne("user"); user != nil {
-		sendAlert(EmailData{
-			to:   user.Get("email").(string),
-			subj: subject,
-			body: body,
-		})
-	}
-}
-
-func handleStatusAlerts(newStatus string, oldRecord *models.Record, alertRecord *models.Record) error {
-	var alertStatus string
-	switch newStatus {
-	case "up":
-		if oldRecord.Get("status") == "down" {
-			alertStatus = "up"
-		}
-	case "down":
-		if oldRecord.Get("status") == "up" {
-			alertStatus = "down"
-		}
-	}
-	if alertStatus == "" {
-		return nil
-	}
-	// expand the user relation
-	if errs := app.Dao().ExpandRecord(alertRecord, []string{"user"}, nil); len(errs) > 0 {
-		return fmt.Errorf("failed to expand: %v", errs)
-	}
-	user := alertRecord.ExpandedOne("user")
-	if user == nil {
-		return nil
-	}
-	emoji := "\U0001F534"
-	if alertStatus == "up" {
-		emoji = "\u2705"
-	}
-	// send alert
-	systemName := oldRecord.Get("name").(string)
-	sendAlert(EmailData{
-		to:   user.Get("email").(string),
-		subj: fmt.Sprintf("Connection to %s is %s %v", systemName, alertStatus, emoji),
-		body: fmt.Sprintf("Connection to %s is %s\n\n- Beszel", systemName, alertStatus),
-	})
-	return nil
-}
-
-func sendAlert(data EmailData) {
-	// fmt.Println("sending alert", "to", data.to, "subj", data.subj, "body", data.body)
-	message := &mailer.Message{
-		From: mail.Address{
-			Address: app.Settings().Meta.SenderAddress,
-			Name:    app.Settings().Meta.SenderName,
-		},
-		To:      []mail.Address{{Address: data.to}},
-		Subject: data.subj,
-		Text:    data.body,
-	}
-	if err := app.NewMailClient().Send(message); err != nil {
-		app.Logger().Error("Failed to send alert: ", "err", err.Error())
-	}
-}

hub/go.mod

@@ -1,90 +0,0 @@
-module beszel
-
-go 1.22.4
-
-require (
-	github.com/blang/semver v3.5.1+incompatible
-	github.com/labstack/echo/v5 v5.0.0-20230722203903-ec5b858dab61
-	github.com/pocketbase/dbx v1.10.1
-	github.com/pocketbase/pocketbase v0.22.16
-	github.com/rhysd/go-github-selfupdate v1.2.3
-	github.com/spf13/cobra v1.8.1
-	golang.org/x/crypto v0.24.0
-)
-
-require (
-	github.com/AlecAivazis/survey/v2 v2.3.7 // indirect
-	github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 // indirect
-	github.com/aws/aws-sdk-go-v2 v1.30.1 // indirect
-	github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.3 // indirect
-	github.com/aws/aws-sdk-go-v2/config v1.27.23 // indirect
-	github.com/aws/aws-sdk-go-v2/credentials v1.17.23 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.9 // indirect
-	github.com/aws/aws-sdk-go-v2/feature/s3/manager v1.17.4 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.13 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.13 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/ini v1.8.0 // indirect
-	github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.13 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.3.15 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.15 // indirect
-	github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.17.13 // indirect
-	github.com/aws/aws-sdk-go-v2/service/s3 v1.58.0 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sso v1.22.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.1 // indirect
-	github.com/aws/aws-sdk-go-v2/service/sts v1.30.1 // indirect
-	github.com/aws/smithy-go v1.20.3 // indirect
-	github.com/disintegration/imaging v1.6.2 // indirect
-	github.com/domodwyer/mailyak/v3 v3.6.2 // indirect
-	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/fatih/color v1.17.0 // indirect
-	github.com/gabriel-vasile/mimetype v1.4.4 // indirect
-	github.com/ganigeorgiev/fexpr v0.4.1 // indirect
-	github.com/go-ozzo/ozzo-validation/v4 v4.3.0 // indirect
-	github.com/goccy/go-json v0.10.3 // indirect
-	github.com/golang-jwt/jwt/v4 v4.5.0 // indirect
-	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
-	github.com/google/go-github/v30 v30.1.0 // indirect
-	github.com/google/go-querystring v1.0.0 // indirect
-	github.com/google/uuid v1.6.0 // indirect
-	github.com/googleapis/gax-go/v2 v2.12.5 // indirect
-	github.com/hashicorp/golang-lru/v2 v2.0.7 // indirect
-	github.com/inconshreveable/go-update v0.0.0-20160112193335-8152e7eb6ccf // indirect
-	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/kballard/go-shellquote v0.0.0-20180428030007-95032a82bc51 // indirect
-	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-sqlite3 v1.14.22 // indirect
-	github.com/mgutz/ansi v0.0.0-20200706080929-d51e80ef957d // indirect
-	github.com/ncruces/go-strftime v0.1.9 // indirect
-	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	github.com/spf13/cast v1.6.0 // indirect
-	github.com/spf13/pflag v1.0.5 // indirect
-	github.com/tcnksm/go-gitconfig v0.1.2 // indirect
-	github.com/ulikunitz/xz v0.5.9 // indirect
-	github.com/valyala/bytebufferpool v1.0.0 // indirect
-	github.com/valyala/fasttemplate v1.2.2 // indirect
-	go.opencensus.io v0.24.0 // indirect
-	gocloud.dev v0.37.0 // indirect
-	golang.org/x/image v0.18.0 // indirect
-	golang.org/x/net v0.26.0 // indirect
-	golang.org/x/oauth2 v0.21.0 // indirect
-	golang.org/x/sync v0.7.0 // indirect
-	golang.org/x/sys v0.21.0 // indirect
-	golang.org/x/term v0.21.0 // indirect
-	golang.org/x/text v0.16.0 // indirect
-	golang.org/x/time v0.5.0 // indirect
-	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
-	google.golang.org/api v0.187.0 // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240701130421-f6361c86f094 // indirect
-	google.golang.org/grpc v1.65.0 // indirect
-	google.golang.org/protobuf v1.34.2 // indirect
-	modernc.org/gc/v3 v3.0.0-20240304020402-f0dba7c97c2b // indirect
-	modernc.org/libc v1.52.1 // indirect
-	modernc.org/mathutil v1.6.0 // indirect
-	modernc.org/memory v1.8.0 // indirect
-	modernc.org/sqlite v1.30.1 // indirect
-	modernc.org/strutil v1.2.0 // indirect
-	modernc.org/token v1.1.0 // indirect
-)

hub/go.sum

@@ -1,399 +0,0 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.115.0 h1:CnFSK6Xo3lDYRoBKEcAtia6VSC837/ZkJuRduSFnr14=
-cloud.google.com/go v0.115.0/go.mod h1:8jIM5vVgoAEoiVxQ/O4BFTfHqulPZgs/ufEzMcFMdWU=
-cloud.google.com/go/auth v0.6.1 h1:T0Zw1XM5c1GlpN2HYr2s+m3vr1p2wy+8VN+Z1FKxW38=
-cloud.google.com/go/auth v0.6.1/go.mod h1:eFHG7zDzbXHKmjJddFG/rBlcGp6t25SwRUiEQSlO4x4=
-cloud.google.com/go/auth/oauth2adapt v0.2.2 h1:+TTV8aXpjeChS9M+aTtN/TjdQnzJvmzKFt//oWu7HX4=
-cloud.google.com/go/auth/oauth2adapt v0.2.2/go.mod h1:wcYjgpZI9+Yu7LyYBg4pqSiaRkfEK3GQcpb7C/uyF1Q=
-cloud.google.com/go/compute v1.25.0 h1:H1/4SqSUhjPFE7L5ddzHOfY2bCAvjwNRZPNl6Ni5oYU=
-cloud.google.com/go/compute/metadata v0.3.0 h1:Tz+eQXMEqDIKRsmY3cHTL6FVaynIjX2QxYC4trgAKZc=
-cloud.google.com/go/compute/metadata v0.3.0/go.mod h1:zFmK7XCadkQkj6TtorcaGlCW1hT1fIilQDwofLpJ20k=
-cloud.google.com/go/iam v1.1.6 h1:bEa06k05IO4f4uJonbB5iAgKTPpABy1ayxaIZV/GHVc=
-cloud.google.com/go/iam v1.1.6/go.mod h1:O0zxdPeGBoFdWW3HWmBxJsk0pfvNM/p/qa82rWOGTwI=
-cloud.google.com/go/storage v1.39.1 h1:MvraqHKhogCOTXTlct/9C3K3+Uy2jBmFYb3/Sp6dVtY=
-cloud.google.com/go/storage v1.39.1/go.mod h1:xK6xZmxZmo+fyP7+DEF6FhNc24/JAe95OLyOHCXFH1o=
-filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
-filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
-github.com/AlecAivazis/survey/v2 v2.3.7 h1:6I/u8FvytdGsgonrYsVn2t8t4QiRnh6QSTqkkhIiSjQ=
-github.com/AlecAivazis/survey/v2 v2.3.7/go.mod h1:xUTIdE4KCOIjsBAE1JYsUPoCqYdZ1reCfTwbto0Fduo=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Netflix/go-expect v0.0.0-20220104043353-73e0943537d2 h1:+vx7roKuyA63nhn5WAunQHLTznkw5W8b1Xc0dNjp83s=
-github.com/Netflix/go-expect v0.0.0-20220104043353-73e0943537d2/go.mod h1:HBCaDeC1lPdgDeDbhX8XFpy1jqjK0IBG8W5K+xYqA0w=
-github.com/asaskevich/govalidator v0.0.0-20200108200545-475eaeb16496/go.mod h1:oGkLhpf+kjZl6xBf758TQhh5XrAeiJv/7FRz/2spLIg=
-github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2 h1:DklsrG3dyBCFEj5IhUbnKptjxatkF07cF2ak3yi77so=
-github.com/asaskevich/govalidator v0.0.0-20230301143203-a9d515a09cc2/go.mod h1:WaHUgvxTVq04UNunO+XhnAqY/wQc+bxr74GqbsZ/Jqw=
-github.com/aws/aws-sdk-go v1.51.11 h1:El5VypsMIz7sFwAAj/j06JX9UGs4KAbAIEaZ57bNY4s=
-github.com/aws/aws-sdk-go v1.51.11/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
-github.com/aws/aws-sdk-go-v2 v1.30.1 h1:4y/5Dvfrhd1MxRDD77SrfsDaj8kUkkljU7XE83NPV+o=
-github.com/aws/aws-sdk-go-v2 v1.30.1/go.mod h1:nIQjQVp5sfpQcTc9mPSr1B0PaWK5ByX9MOoDadSN4lc=
-github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.3 h1:tW1/Rkad38LA15X4UQtjXZXNKsCgkshC3EbmcUmghTg=
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hub/main.go

@@ -1,450 +0,0 @@
-package main
-
-import (
-	_ "beszel/migrations"
-	"beszel/site"
-	"bytes"
-	"crypto/ed25519"
-	"encoding/json"
-	"encoding/pem"
-	"errors"
-	"fmt"
-	"log"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"os"
-	"strings"
-	"sync"
-	"time"
-
-	"github.com/labstack/echo/v5"
-	"github.com/pocketbase/pocketbase"
-	"github.com/pocketbase/pocketbase/apis"
-	"github.com/pocketbase/pocketbase/core"
-	"github.com/pocketbase/pocketbase/models"
-	"github.com/pocketbase/pocketbase/plugins/migratecmd"
-	"github.com/pocketbase/pocketbase/tools/cron"
-	"github.com/pocketbase/pocketbase/tools/types"
-	"github.com/spf13/cobra"
-	"golang.org/x/crypto/ssh"
-)
-
-var Version = "0.0.1-alpha.9"
-
-var app *pocketbase.PocketBase
-var serverConnections = make(map[string]*Server)
-var serverConnectionsLock = sync.Mutex{}
-
-func main() {
-	app = pocketbase.NewWithConfig(pocketbase.Config{
-		DefaultDataDir: "beszel_data",
-	})
-	app.RootCmd.Version = Version
-	app.RootCmd.Use = "beszel"
-	app.RootCmd.Short = ""
-
-	// add update command
-	app.RootCmd.AddCommand(&cobra.Command{
-		Use:   "update",
-		Short: "Update beszel to the latest version",
-		Run:   updateBeszel,
-	})
-
-	// loosely check if it was executed using "go run"
-	isGoRun := strings.HasPrefix(os.Args[0], os.TempDir())
-
-	// // enable auto creation of migration files when making collection changes in the Admin UI
-	migratecmd.MustRegister(app, app.RootCmd, migratecmd.Config{
-		// (the isGoRun check is to enable it only during development)
-		Automigrate: isGoRun,
-	})
-
-	// set auth settings
-	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
-		usersCollection, err := app.Dao().FindCollectionByNameOrId("users")
-		if err != nil {
-			return err
-		}
-		usersAuthOptions := usersCollection.AuthOptions()
-		usersAuthOptions.AllowUsernameAuth = false
-		if os.Getenv("DISABLE_PASSWORD_AUTH") == "true" {
-			usersAuthOptions.AllowEmailAuth = false
-		} else {
-			usersAuthOptions.AllowEmailAuth = true
-		}
-		usersCollection.SetOptions(usersAuthOptions)
-		if err := app.Dao().SaveCollection(usersCollection); err != nil {
-			return err
-		}
-		return nil
-	})
-
-	// serve site
-	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
-		switch isGoRun {
-		case true:
-			proxy := httputil.NewSingleHostReverseProxy(&url.URL{
-				Scheme: "http",
-				Host:   "localhost:5173",
-			})
-			e.Router.GET("/static/*", apis.StaticDirectoryHandler(os.DirFS("./site/public/static"), false))
-			e.Router.Any("/*", echo.WrapHandler(proxy))
-			// e.Router.Any("/", echo.WrapHandler(proxy))
-		default:
-			e.Router.GET("/static/*", apis.StaticDirectoryHandler(site.Static, false))
-			e.Router.Any("/*", apis.StaticDirectoryHandler(site.Dist, true))
-		}
-		return nil
-	})
-
-	// set up cron jobs / ticker for system updates
-	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
-		// 15 second ticker for system updates
-		go startSystemUpdateTicker()
-		// cron job to delete old records
-		scheduler := cron.New()
-		scheduler.MustAdd("delete old records", "8 * * * *", func() {
-			deleteOldRecords("system_stats", "1m", time.Hour)
-			deleteOldRecords("container_stats", "1m", time.Hour)
-			deleteOldRecords("system_stats", "10m", 12*time.Hour)
-			deleteOldRecords("container_stats", "10m", 12*time.Hour)
-			deleteOldRecords("system_stats", "20m", 24*time.Hour)
-			deleteOldRecords("container_stats", "20m", 24*time.Hour)
-			deleteOldRecords("system_stats", "120m", 7*24*time.Hour)
-			deleteOldRecords("container_stats", "120m", 7*24*time.Hour)
-			deleteOldRecords("system_stats", "480m", 30*24*time.Hour)
-			deleteOldRecords("container_stats", "480m", 30*24*time.Hour)
-		})
-		scheduler.Start()
-		return nil
-	})
-
-	// ssh key setup
-	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
-		// create ssh key if it doesn't exist
-		getSSHKey()
-		// api route to return public key
-		e.Router.GET("/api/beszel/getkey", func(c echo.Context) error {
-			requestData := apis.RequestInfo(c)
-			if requestData.AuthRecord == nil {
-				return apis.NewForbiddenError("Forbidden", nil)
-			}
-			key, err := os.ReadFile(app.DataDir() + "/id_ed25519.pub")
-			if err != nil {
-				return err
-			}
-			return c.JSON(http.StatusOK, map[string]string{"key": strings.TrimSuffix(string(key), "\n")})
-		})
-		return nil
-	})
-
-	// other api routes
-	app.OnBeforeServe().Add(func(e *core.ServeEvent) error {
-		// check if first time setup on login page
-		e.Router.GET("/api/beszel/first-run", func(c echo.Context) error {
-			adminNum, err := app.Dao().TotalAdmins()
-			if err != nil {
-				return err
-			}
-			return c.JSON(http.StatusOK, map[string]bool{"firstRun": adminNum == 0})
-		})
-		return nil
-	})
-
-	// immediately create connection for new servers
-	app.OnModelAfterCreate("systems").Add(func(e *core.ModelEvent) error {
-		go updateSystem(e.Model.(*models.Record))
-		return nil
-	})
-
-	// do things after a systems record is updated
-	app.OnModelAfterUpdate("systems").Add(func(e *core.ModelEvent) error {
-		newRecord := e.Model.(*models.Record)
-		oldRecord := newRecord.OriginalCopy()
-		newStatus := newRecord.Get("status").(string)
-
-		// if server is disconnected and connection exists, remove it
-		if newStatus == "down" || newStatus == "paused" {
-			deleteServerConnection(newRecord)
-		}
-
-		// if server is set to pending (unpause), try to connect immediately
-		if newStatus == "pending" {
-			go updateSystem(newRecord)
-		}
-
-		// alerts
-		handleSystemAlerts(newStatus, newRecord, oldRecord)
-		return nil
-	})
-
-	// do things after a systems record is deleted
-	app.OnModelAfterDelete("systems").Add(func(e *core.ModelEvent) error {
-		// if server connection exists, close it
-		deleteServerConnection(e.Model.(*models.Record))
-		return nil
-	})
-
-	app.OnModelAfterCreate("system_stats").Add(func(e *core.ModelEvent) error {
-		createLongerRecords("system_stats", e.Model.(*models.Record))
-		return nil
-	})
-
-	app.OnModelAfterCreate("container_stats").Add(func(e *core.ModelEvent) error {
-		createLongerRecords("container_stats", e.Model.(*models.Record))
-		return nil
-	})
-
-	if err := app.Start(); err != nil {
-		log.Fatal(err)
-	}
-}
-
-func startSystemUpdateTicker() {
-	ticker := time.NewTicker(15 * time.Second)
-	for range ticker.C {
-		updateSystems()
-	}
-}
-
-func updateSystems() {
-	records, err := app.Dao().FindRecordsByFilter(
-		"2hz5ncl8tizk5nx",    // collection
-		"status != 'paused'", // filter
-		"updated",            // sort
-		-1,                   // limit
-		0,                    // offset
-	)
-	// log.Println("records", len(records))
-	if err != nil || len(records) == 0 {
-		// app.Logger().Error("Failed to query systems")
-		return
-	}
-	fiftySecondsAgo := time.Now().UTC().Add(-50 * time.Second)
-	batchSize := len(records)/4 + 1
-	for i := 0; i < batchSize; i++ {
-		if records[i].Get("updated").(types.DateTime).Time().After(fiftySecondsAgo) {
-			break
-		}
-		// log.Println("updating", records[i].Get(("name")))
-		go updateSystem(records[i])
-	}
-}
-
-func updateSystem(record *models.Record) {
-	var server *Server
-	// check if server connection data exists
-	if _, ok := serverConnections[record.Id]; ok {
-		server = serverConnections[record.Id]
-	} else {
-		// create server connection struct
-		server = &Server{
-			Host: record.Get("host").(string),
-			Port: record.Get("port").(string),
-		}
-		client, err := getServerConnection(server)
-		if err != nil {
-			app.Logger().Error("Failed to connect:", "err", err.Error(), "server", server.Host, "port", server.Port)
-			updateServerStatus(record, "down")
-			return
-		}
-		server.Client = client
-		serverConnectionsLock.Lock()
-		serverConnections[record.Id] = server
-		serverConnectionsLock.Unlock()
-	}
-	// get server stats from agent
-	systemData, err := requestJson(server)
-	if err != nil {
-		if err.Error() == "retry" {
-			// if previous connection was closed, try again
-			app.Logger().Error("Existing SSH connection closed. Retrying...", "host", server.Host, "port", server.Port)
-			deleteServerConnection(record)
-			updateSystem(record)
-			return
-		}
-		app.Logger().Error("Failed to get server stats: ", "err", err.Error())
-		updateServerStatus(record, "down")
-		return
-	}
-	// update system record
-	record.Set("status", "up")
-	record.Set("info", systemData.Info)
-	if err := app.Dao().SaveRecord(record); err != nil {
-		app.Logger().Error("Failed to update record: ", "err", err.Error())
-	}
-	// add new system_stats record
-	system_stats, _ := app.Dao().FindCollectionByNameOrId("system_stats")
-	system_stats_record := models.NewRecord(system_stats)
-	system_stats_record.Set("system", record.Id)
-	system_stats_record.Set("stats", systemData.Stats)
-	system_stats_record.Set("type", "1m")
-	if err := app.Dao().SaveRecord(system_stats_record); err != nil {
-		app.Logger().Error("Failed to save record: ", "err", err.Error())
-	}
-	// add new container_stats record
-	if len(systemData.Containers) > 0 {
-		container_stats, _ := app.Dao().FindCollectionByNameOrId("container_stats")
-		container_stats_record := models.NewRecord(container_stats)
-		container_stats_record.Set("system", record.Id)
-		container_stats_record.Set("stats", systemData.Containers)
-		container_stats_record.Set("type", "1m")
-		if err := app.Dao().SaveRecord(container_stats_record); err != nil {
-			app.Logger().Error("Failed to save record: ", "err", err.Error())
-		}
-	}
-}
-
-// set server to status down and close connection
-func updateServerStatus(record *models.Record, status string) {
-	// if in map, close connection and remove from map
-	// this is now down automatically in an after update hook
-	// if status == "down" || status == "paused" {
-	// 	deleteServerConnection(record)
-	// }
-	if record.Get("status") != status {
-		record.Set("status", status)
-		if err := app.Dao().SaveRecord(record); err != nil {
-			app.Logger().Error("Failed to update record: ", "err", err.Error())
-		}
-	}
-}
-
-func deleteServerConnection(record *models.Record) {
-	if _, ok := serverConnections[record.Id]; ok {
-		if serverConnections[record.Id].Client != nil {
-			serverConnections[record.Id].Client.Close()
-		}
-		serverConnectionsLock.Lock()
-		defer serverConnectionsLock.Unlock()
-		delete(serverConnections, record.Id)
-	}
-}
-
-func getServerConnection(server *Server) (*ssh.Client, error) {
-	// app.Logger().Debug("new ssh connection", "server", server.Host)
-	key, err := getSSHKey()
-	if err != nil {
-		app.Logger().Error("Failed to get SSH key: ", "err", err.Error())
-		return nil, err
-	}
-	time.Sleep(time.Second)
-
-	// Create the Signer for this private key.
-	signer, err := ssh.ParsePrivateKey(key)
-	if err != nil {
-		return nil, err
-	}
-
-	config := &ssh.ClientConfig{
-		User: "u",
-		Auth: []ssh.AuthMethod{
-			ssh.PublicKeys(signer),
-		},
-		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
-		Timeout:         5 * time.Second,
-	}
-
-	client, err := ssh.Dial("tcp", fmt.Sprintf("%s:%s", server.Host, server.Port), config)
-	if err != nil {
-		return nil, err
-	}
-
-	return client, nil
-}
-
-func requestJson(server *Server) (SystemData, error) {
-	session, err := server.Client.NewSession()
-	if err != nil {
-		return SystemData{}, errors.New("retry")
-	}
-	defer session.Close()
-
-	// Create a buffer to capture the output
-	var outputBuffer bytes.Buffer
-	session.Stdout = &outputBuffer
-
-	if err := session.Shell(); err != nil {
-		return SystemData{}, err
-	}
-
-	err = session.Wait()
-	if err != nil {
-		return SystemData{}, err
-	}
-
-	// Unmarshal the output into our struct
-	var systemData SystemData
-	err = json.Unmarshal(outputBuffer.Bytes(), &systemData)
-	if err != nil {
-		return SystemData{}, err
-	}
-
-	return systemData, nil
-}
-
-func getSSHKey() ([]byte, error) {
-	dataDir := app.DataDir()
-	// check if the key pair already exists
-	existingKey, err := os.ReadFile(dataDir + "/id_ed25519")
-	if err == nil {
-		return existingKey, nil
-	}
-
-	// Generate the Ed25519 key pair
-	pubKey, privKey, err := ed25519.GenerateKey(nil)
-	if err != nil {
-		// app.Logger().Error("Error generating key pair:", "err", err.Error())
-		return nil, err
-	}
-
-	// Get the private key in OpenSSH format
-	privKeyBytes, err := ssh.MarshalPrivateKey(privKey, "")
-	if err != nil {
-		// app.Logger().Error("Error marshaling private key:", "err", err.Error())
-		return nil, err
-	}
-
-	// Save the private key to a file
-	privateFile, err := os.Create(dataDir + "/id_ed25519")
-	if err != nil {
-		// app.Logger().Error("Error creating private key file:", "err", err.Error())
-		return nil, err
-	}
-	defer privateFile.Close()
-
-	if err := pem.Encode(privateFile, privKeyBytes); err != nil {
-		// app.Logger().Error("Error writing private key to file:", "err", err.Error())
-		return nil, err
-	}
-
-	// Generate the public key in OpenSSH format
-	publicKey, err := ssh.NewPublicKey(pubKey)
-	if err != nil {
-		return nil, err
-	}
-
-	pubKeyBytes := ssh.MarshalAuthorizedKey(publicKey)
-
-	// Save the public key to a file
-	publicFile, err := os.Create(dataDir + "/id_ed25519.pub")
-	if err != nil {
-		return nil, err
-	}
-	defer publicFile.Close()
-
-	if _, err := publicFile.Write(pubKeyBytes); err != nil {
-		return nil, err
-	}
-
-	app.Logger().Info("ed25519 SSH key pair generated successfully.")
-	app.Logger().Info("Private key saved to: " + dataDir + "/id_ed25519")
-	app.Logger().Info("Public key saved to: " + dataDir + "/id_ed25519.pub")
-
-	existingKey, err = os.ReadFile(dataDir + "/id_ed25519")
-	if err == nil {
-		return existingKey, nil
-	}
-	return nil, err
-}

hub/migrations/1720568457_collections_snapshot.go

@@ -1,418 +0,0 @@
-package migrations
-
-import (
-	"encoding/json"
-
-	"github.com/pocketbase/dbx"
-	"github.com/pocketbase/pocketbase/daos"
-	m "github.com/pocketbase/pocketbase/migrations"
-	"github.com/pocketbase/pocketbase/models"
-)
-
-func init() {
-	m.Register(func(db dbx.Builder) error {
-		jsonData := `[
-			{
-				"id": "2hz5ncl8tizk5nx",
-				"created": "2024-07-07 16:08:20.979Z",
-				"updated": "2024-07-22 19:39:17.434Z",
-				"name": "systems",
-				"type": "base",
-				"system": false,
-				"schema": [
-					{
-						"system": false,
-						"id": "7xloxkwk",
-						"name": "name",
-						"type": "text",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"min": null,
-							"max": null,
-							"pattern": ""
-						}
-					},
-					{
-						"system": false,
-						"id": "waj7seaf",
-						"name": "status",
-						"type": "select",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSelect": 1,
-							"values": [
-								"up",
-								"down",
-								"paused",
-								"pending"
-							]
-						}
-					},
-					{
-						"system": false,
-						"id": "ve781smf",
-						"name": "host",
-						"type": "text",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"min": null,
-							"max": null,
-							"pattern": ""
-						}
-					},
-					{
-						"system": false,
-						"id": "pij0k2jk",
-						"name": "port",
-						"type": "text",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"min": null,
-							"max": null,
-							"pattern": ""
-						}
-					},
-					{
-						"system": false,
-						"id": "qoq64ntl",
-						"name": "info",
-						"type": "json",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSize": 2000000
-						}
-					},
-					{
-						"system": false,
-						"id": "jcarjnjj",
-						"name": "users",
-						"type": "relation",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"collectionId": "_pb_users_auth_",
-							"cascadeDelete": true,
-							"minSelect": null,
-							"maxSelect": null,
-							"displayFields": null
-						}
-					}
-				],
-				"indexes": [],
-				"listRule": "@request.auth.id != \"\" && users.id ?= @request.auth.id",
-				"viewRule": "@request.auth.id != \"\" && users.id ?= @request.auth.id",
-				"createRule": "@request.auth.id != \"\" && users.id ?= @request.auth.id && @request.auth.role != \"readonly\"",
-				"updateRule": "@request.auth.id != \"\" && users.id ?= @request.auth.id && @request.auth.role != \"readonly\"",
-				"deleteRule": "@request.auth.id != \"\" && users.id ?= @request.auth.id && @request.auth.role != \"readonly\"",
-				"options": {}
-			},
-			{
-				"id": "ej9oowivz8b2mht",
-				"created": "2024-07-07 16:09:09.179Z",
-				"updated": "2024-07-18 15:56:45.302Z",
-				"name": "system_stats",
-				"type": "base",
-				"system": false,
-				"schema": [
-					{
-						"system": false,
-						"id": "h9sg148r",
-						"name": "system",
-						"type": "relation",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"collectionId": "2hz5ncl8tizk5nx",
-							"cascadeDelete": true,
-							"minSelect": null,
-							"maxSelect": 1,
-							"displayFields": null
-						}
-					},
-					{
-						"system": false,
-						"id": "azftn0be",
-						"name": "stats",
-						"type": "json",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSize": 2000000
-						}
-					},
-					{
-						"system": false,
-						"id": "m1ekhli3",
-						"name": "type",
-						"type": "select",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSelect": 1,
-							"values": [
-								"1m",
-								"10m",
-								"20m",
-								"120m",
-								"480m"
-							]
-						}
-					}
-				],
-				"indexes": [
-					"CREATE INDEX ` + "`" + `idx_GxIee0j` + "`" + ` ON ` + "`" + `system_stats` + "`" + ` (` + "`" + `system` + "`" + `)"
-				],
-				"listRule": "@request.auth.id != \"\"",
-				"viewRule": null,
-				"createRule": null,
-				"updateRule": null,
-				"deleteRule": null,
-				"options": {}
-			},
-			{
-				"id": "juohu4jipgc13v7",
-				"created": "2024-07-07 16:09:57.976Z",
-				"updated": "2024-07-18 15:57:50.933Z",
-				"name": "container_stats",
-				"type": "base",
-				"system": false,
-				"schema": [
-					{
-						"system": false,
-						"id": "hutcu6ps",
-						"name": "system",
-						"type": "relation",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"collectionId": "2hz5ncl8tizk5nx",
-							"cascadeDelete": true,
-							"minSelect": null,
-							"maxSelect": 1,
-							"displayFields": null
-						}
-					},
-					{
-						"system": false,
-						"id": "r39hhnil",
-						"name": "stats",
-						"type": "json",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSize": 2000000
-						}
-					},
-					{
-						"system": false,
-						"id": "vo7iuj96",
-						"name": "type",
-						"type": "select",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSelect": 1,
-							"values": [
-								"1m",
-								"10m",
-								"20m",
-								"120m",
-								"480m"
-							]
-						}
-					}
-				],
-				"indexes": [],
-				"listRule": "@request.auth.id != \"\"",
-				"viewRule": null,
-				"createRule": null,
-				"updateRule": null,
-				"deleteRule": null,
-				"options": {}
-			},
-			{
-				"id": "_pb_users_auth_",
-				"created": "2024-07-14 16:25:18.226Z",
-				"updated": "2024-07-22 20:10:20.670Z",
-				"name": "users",
-				"type": "auth",
-				"system": false,
-				"schema": [
-					{
-						"system": false,
-						"id": "qkbp58ae",
-						"name": "role",
-						"type": "select",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSelect": 1,
-							"values": [
-								"user",
-								"admin",
-								"readonly"
-							]
-						}
-					},
-					{
-						"system": false,
-						"id": "users_avatar",
-						"name": "avatar",
-						"type": "file",
-						"required": false,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"mimeTypes": [
-								"image/jpeg",
-								"image/png",
-								"image/svg+xml",
-								"image/gif",
-								"image/webp"
-							],
-							"thumbs": null,
-							"maxSelect": 1,
-							"maxSize": 5242880,
-							"protected": false
-						}
-					}
-				],
-				"indexes": [],
-				"listRule": "id = @request.auth.id",
-				"viewRule": "id = @request.auth.id",
-				"createRule": null,
-				"updateRule": null,
-				"deleteRule": null,
-				"options": {
-					"allowEmailAuth": true,
-					"allowOAuth2Auth": true,
-					"allowUsernameAuth": false,
-					"exceptEmailDomains": null,
-					"manageRule": null,
-					"minPasswordLength": 8,
-					"onlyEmailDomains": null,
-					"onlyVerified": true,
-					"requireEmail": false
-				}
-			},
-			{
-				"id": "elngm8x1l60zi2v",
-				"created": "2024-07-15 01:16:04.044Z",
-				"updated": "2024-07-22 19:13:16.498Z",
-				"name": "alerts",
-				"type": "base",
-				"system": false,
-				"schema": [
-					{
-						"system": false,
-						"id": "hn5ly3vi",
-						"name": "user",
-						"type": "relation",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"collectionId": "_pb_users_auth_",
-							"cascadeDelete": true,
-							"minSelect": null,
-							"maxSelect": 1,
-							"displayFields": null
-						}
-					},
-					{
-						"system": false,
-						"id": "g5sl3jdg",
-						"name": "system",
-						"type": "relation",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"collectionId": "2hz5ncl8tizk5nx",
-							"cascadeDelete": true,
-							"minSelect": null,
-							"maxSelect": 1,
-							"displayFields": null
-						}
-					},
-					{
-						"system": false,
-						"id": "zj3ingrv",
-						"name": "name",
-						"type": "select",
-						"required": true,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"maxSelect": 1,
-							"values": [
-								"Status",
-								"CPU",
-								"Memory",
-								"Disk"
-							]
-						}
-					},
-					{
-						"system": false,
-						"id": "o2ablxvn",
-						"name": "value",
-						"type": "number",
-						"required": false,
-						"presentable": false,
-						"unique": false,
-						"options": {
-							"min": null,
-							"max": null,
-							"noDecimal": false
-						}
-					},
-					{
-						"system": false,
-						"id": "6hgdf6hs",
-						"name": "triggered",
-						"type": "bool",
-						"required": false,
-						"presentable": false,
-						"unique": false,
-						"options": {}
-					}
-				],
-				"indexes": [],
-				"listRule": "@request.auth.id != \"\" && user.id = @request.auth.id",
-				"viewRule": "",
-				"createRule": "@request.auth.id != \"\" && user.id = @request.auth.id",
-				"updateRule": "@request.auth.id != \"\" && user.id = @request.auth.id",
-				"deleteRule": "@request.auth.id != \"\" && user.id = @request.auth.id",
-				"options": {}
-			}
-		]`
-
-		collections := []*models.Collection{}
-		if err := json.Unmarshal([]byte(jsonData), &collections); err != nil {
-			return err
-		}
-
-		return daos.New(db).ImportCollections(collections, true, nil)
-	}, func(db dbx.Builder) error {
-		return nil
-	})
-}

hub/migrations/initial-settings.go

@@ -1,19 +0,0 @@
-package migrations
-
-import (
-	"github.com/pocketbase/dbx"
-	"github.com/pocketbase/pocketbase/daos"
-	m "github.com/pocketbase/pocketbase/migrations"
-)
-
-func init() {
-	m.Register(func(db dbx.Builder) error {
-		dao := daos.New(db)
-
-		settings, _ := dao.FindSettings()
-		settings.Meta.AppName = "Beszel"
-		settings.Meta.HideControls = true
-
-		return dao.SaveSettings(settings)
-	}, nil)
-}

hub/records.go

@@ -1,153 +0,0 @@
-package main
-
-import (
-	"encoding/json"
-	"fmt"
-	"log"
-	"math"
-	"reflect"
-	"time"
-
-	"github.com/pocketbase/dbx"
-	"github.com/pocketbase/pocketbase/models"
-	"github.com/pocketbase/pocketbase/tools/types"
-)
-
-func createLongerRecords(collectionName string, shorterRecord *models.Record) {
-	shorterRecordType := shorterRecord.Get("type").(string)
-	systemId := shorterRecord.Get("system").(string)
-	// fmt.Println("create longer records", "recordType", shorterRecordType, "systemId", systemId)
-	var longerRecordType string
-	var timeAgo time.Duration
-	var expectedShorterRecords int
-	switch shorterRecordType {
-	case "1m":
-		longerRecordType = "10m"
-		timeAgo = -10 * time.Minute
-		expectedShorterRecords = 10
-	case "10m":
-		longerRecordType = "20m"
-		timeAgo = -20 * time.Minute
-		expectedShorterRecords = 2
-	case "20m":
-		longerRecordType = "120m"
-		timeAgo = -120 * time.Minute
-		expectedShorterRecords = 6
-	default:
-		longerRecordType = "480m"
-		timeAgo = -480 * time.Minute
-		expectedShorterRecords = 4
-	}
-
-	longerRecordPeriod := time.Now().UTC().Add(timeAgo + 10*time.Second).Format("2006-01-02 15:04:05")
-	// check creation time of last 10m record
-	lastLongerRecord, err := app.Dao().FindFirstRecordByFilter(
-		collectionName,
-		"type = {:type} && system = {:system} && created > {:created}",
-		dbx.Params{"type": longerRecordType, "system": systemId, "created": longerRecordPeriod},
-	)
-	// return if longer record exists
-	if err == nil || lastLongerRecord != nil {
-		// log.Println("longer record found. returning")
-		return
-	}
-	// get shorter records from the past x minutes
-	// shorterRecordPeriod := time.Now().UTC().Add(timeAgo + time.Second).Format("2006-01-02 15:04:05")
-	allShorterRecords, err := app.Dao().FindRecordsByFilter(
-		collectionName,
-		"type = {:type} && system = {:system} && created > {:created}",
-		"-created",
-		-1,
-		0,
-		dbx.Params{"type": shorterRecordType, "system": systemId, "created": longerRecordPeriod},
-	)
-	// return if not enough shorter records
-	if err != nil || len(allShorterRecords) < expectedShorterRecords {
-		// log.Println("not enough shorter records. returning")
-		return
-	}
-	// average the shorter records and create longer record
-	var stats interface{}
-	switch collectionName {
-	case "system_stats":
-		stats = averageSystemStats(allShorterRecords)
-	case "container_stats":
-		stats = averageContainerStats(allShorterRecords)
-	}
-	collection, _ := app.Dao().FindCollectionByNameOrId(collectionName)
-	tenMinRecord := models.NewRecord(collection)
-	tenMinRecord.Set("system", systemId)
-	tenMinRecord.Set("stats", stats)
-	tenMinRecord.Set("type", longerRecordType)
-	if err := app.Dao().SaveRecord(tenMinRecord); err != nil {
-		fmt.Println("failed to save longer record", "err", err.Error())
-	}
-
-}
-
-// calculate the average stats of a list of system_stats records
-func averageSystemStats(records []*models.Record) SystemStats {
-	count := float64(len(records))
-	sum := reflect.New(reflect.TypeOf(SystemStats{})).Elem()
-
-	for _, record := range records {
-		var stats SystemStats
-		json.Unmarshal([]byte(record.Get("stats").(types.JsonRaw)), &stats)
-		statValue := reflect.ValueOf(stats)
-		for i := 0; i < statValue.NumField(); i++ {
-			field := sum.Field(i)
-			field.SetFloat(field.Float() + statValue.Field(i).Float())
-		}
-	}
-
-	average := reflect.New(reflect.TypeOf(SystemStats{})).Elem()
-	for i := 0; i < sum.NumField(); i++ {
-		average.Field(i).SetFloat(twoDecimals(sum.Field(i).Float() / count))
-	}
-
-	return average.Interface().(SystemStats)
-}
-
-// calculate the average stats of a list of container_stats records
-func averageContainerStats(records []*models.Record) (stats []ContainerStats) {
-	sums := make(map[string]*ContainerStats)
-	count := float64(len(records))
-	for _, record := range records {
-		var stats []ContainerStats
-		json.Unmarshal([]byte(record.Get("stats").(types.JsonRaw)), &stats)
-		for _, stat := range stats {
-			if _, ok := sums[stat.Name]; !ok {
-				sums[stat.Name] = &ContainerStats{Name: stat.Name, Cpu: 0, Mem: 0}
-			}
-			sums[stat.Name].Cpu += stat.Cpu
-			sums[stat.Name].Mem += stat.Mem
-		}
-	}
-	for _, value := range sums {
-		stats = append(stats, ContainerStats{
-			Name: value.Name,
-			Cpu:  twoDecimals(value.Cpu / count),
-			Mem:  twoDecimals(value.Mem / count),
-		})
-	}
-	return stats
-}
-
-/* Round float to two decimals */
-func twoDecimals(value float64) float64 {
-	return math.Round(value*100) / 100
-}
-
-/* Delete records of specified collection and type that are older than timeLimit */
-func deleteOldRecords(collection string, recordType string, timeLimit time.Duration) {
-	timeLimitStamp := time.Now().UTC().Add(-timeLimit).Format("2006-01-02 15:04:05")
-	records, _ := app.Dao().FindRecordsByExpr(collection,
-		dbx.NewExp("type = {:type}", dbx.Params{"type": recordType}),
-		dbx.NewExp("created < {:created}", dbx.Params{"created": timeLimitStamp}),
-	)
-	for _, record := range records {
-		if err := app.Dao().DeleteRecord(record); err != nil {
-			log.Fatal(err)
-		}
-	}
-}

hub/site/components.json

@@ -1,17 +0,0 @@
-{
-  "$schema": "https://ui.shadcn.com/schema.json",
-  "style": "default",
-  "rsc": false,
-  "tsx": true,
-  "tailwind": {
-    "config": "tailwind.config.js",
-    "css": "src/index.css",
-    "baseColor": "gray",
-    "cssVariables": true,
-    "prefix": ""
-  },
-  "aliases": {
-    "components": "@/components",
-    "utils": "@/lib/utils"
-  }
-}

hub/site/embed.go

@@ -1,15 +0,0 @@
-// Package site handles the Beszel frontend embedding.
-package site
-
-import (
-	"embed"
-
-	"github.com/labstack/echo/v5"
-)
-
-//go:embed all:dist
-var assets embed.FS
-
-var Dist = echo.MustSubFS(assets, "dist")
-
-var Static = echo.MustSubFS(assets, "dist/static")

hub/site/index.html

@@ -1,19 +0,0 @@
-<!DOCTYPE html>
-<html lang="en">
-	<head>
-		<meta charset="UTF-8" />
-		<link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
-		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
-		<title>Beszel</title>
-		<link rel="preconnect" href="https://fonts.googleapis.com" />
-		<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin />
-		<link
-			href="https://fonts.googleapis.com/css2?family=Inter:wght@100..900&display=swap"
-			rel="stylesheet"
-		/>
-	</head>
-	<body>
-		<div id="app"></div>
-		<script type="module" src="/src/main.tsx"></script>
-	</body>
-</html>

hub/site/package.json

@@ -1,52 +0,0 @@
-{
-  "name": "site",
-  "private": true,
-  "version": "0.0.0",
-  "type": "module",
-  "scripts": {
-    "dev": "vite",
-    "build": "vite build",
-    "preview": "vite preview"
-  },
-  "dependencies": {
-    "@nanostores/react": "^0.7.2",
-    "@nanostores/router": "^0.15.0",
-    "@radix-ui/react-alert-dialog": "^1.1.1",
-    "@radix-ui/react-dialog": "^1.1.1",
-    "@radix-ui/react-dropdown-menu": "^2.1.1",
-    "@radix-ui/react-label": "^2.1.0",
-    "@radix-ui/react-select": "^2.1.1",
-    "@radix-ui/react-separator": "^1.1.0",
-    "@radix-ui/react-slider": "^1.2.0",
-    "@radix-ui/react-slot": "^1.1.0",
-    "@radix-ui/react-switch": "^1.1.0",
-    "@radix-ui/react-toast": "^1.2.1",
-    "@radix-ui/react-tooltip": "^1.1.2",
-    "@tanstack/react-table": "^8.19.2",
-    "@vitejs/plugin-react": "^4.3.1",
-    "class-variance-authority": "^0.7.0",
-    "clsx": "^2.1.1",
-    "cmdk": "^1.0.0",
-    "d3-scale": "^4.0.2",
-    "d3-time": "^3.1.0",
-    "lucide-react": "^0.407.0",
-    "nanostores": "^0.10.3",
-    "pocketbase": "^0.21.3",
-    "react": "^18.3.1",
-    "react-dom": "^18.3.1",
-    "recharts": "^2.13.0-alpha.1",
-    "tailwind-merge": "^2.4.0",
-    "tailwindcss-animate": "^1.0.7",
-    "valibot": "^0.36.0"
-  },
-  "devDependencies": {
-    "@types/bun": "^1.1.6",
-    "@types/react": "^18.3.3",
-    "@types/react-dom": "^18.3.0",
-    "autoprefixer": "^10.4.19",
-    "postcss": "^8.4.39",
-    "tailwindcss": "^3.4.4",
-    "typescript": "^5.5.3",
-    "vite": "^5.3.3"
-  }
-}

hub/site/postcss.config.js

@@ -1,6 +0,0 @@
-export default {
-  plugins: {
-    tailwindcss: {},
-    autoprefixer: {},
-  },
-}

hub/site/public/static/apple.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12.2 6.9c-1 0-2.5-1-4-1-2 0-4 1.1-5 3-2 3.6-.5 9 1.5 12 1 1.5 2.3 3.2 3.8 3.1 1.6 0 2.1-1 4-1 1.8 0 2.3 1 4 1 1.6 0 2.6-1.5 3.6-3a13 13 0 0 0 1.7-3.4 5.3 5.3 0 0 1-.6-9.4 5.6 5.6 0 0 0-4.4-2.4C14.8 5.6 13 7 12.2 7zm3.3-3c.9-1 1.4-2.5 1.3-3.9-1.2 0-2.7.8-3.6 1.8A5 5 0 0 0 12 5.5c1.3.1 2.7-.7 3.5-1.7"/></svg>

hub/site/public/static/bitbucket.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M.8 1.2a.8.8 0 0 0-.8 1l3.3 19.7c0 .5.5.9 1 .9h15.6a.8.8 0 0 0 .8-.7l3.3-20a.8.8 0 0 0-.8-.9zm13.7 14.3h-5l-1.3-7h7.5z"/></svg>

hub/site/public/static/discord.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20.3 4.4a19.8 19.8 0 0 0-4.9-1.5L14.7 4C13 4 11.1 4 9.3 4.1L8.6 3a19.7 19.7 0 0 0-5 1.5C.6 9-.4 13.6.1 18.1c2 1.5 4 2.4 6 3h.1c.5-.6.9-1.3 1.2-2l-1.9-1V18l.4-.3c4 1.8 8.2 1.8 12.1 0h.1l.4.3v.1a12.3 12.3 0 0 1-2 1l1.3 2c2-.6 4-1.5 6-3h.1c.5-5.2-.8-9.7-3.6-13.7zM8 15.4c-1.2 0-2.1-1.2-2.1-2.5s1-2.4 2.1-2.4c1.2 0 2.2 1 2.2 2.4 0 1.3-1 2.4-2.2 2.4zm8 0c-1.2 0-2.2-1.2-2.2-2.5s1-2.4 2.2-2.4c1.2 0 2.2 1 2.2 2.4 0 1.3-1 2.4-2.2 2.4Z"/></svg>

hub/site/public/static/facebook.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.1 23.7v-8H6.6V12h2.5v-1.5c0-4.1 1.8-6 5.9-6h1.4a8.7 8.7 0 0 1 1.2.3V8a8.6 8.6 0 0 0-.7 0 26.8 26.8 0 0 0-.7 0c-.7 0-1.3 0-1.7.3a1.7 1.7 0 0 0-.7.6c-.2.4-.3 1-.3 1.7V12h3.9l-.4 2.1-.3 1.6h-3.2V24a12 12 0 1 0-4.4-.3Z"/></svg>

hub/site/public/static/favicon-green.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 56 70" fill="#22c55e"><path d="M35 70H0V0h35q4.4 0 8.2 1.7a21.4 21.4 0 0 1 6.6 4.5q2.9 2.8 4.5 6.6Q56 16.7 56 21a15.4 15.4 0 0 1-.3 3.2 17.6 17.6 0 0 1-.2.8 19.4 19.4 0 0 1-1.5 4 17 17 0 0 1-2.4 3.4 13.5 13.5 0 0 1-2.6 2.3 12.5 12.5 0 0 1-.4.3q1.7 1 3 2.5Q53 39.1 54 41a18.3 18.3 0 0 1 1.5 4 17.4 17.4 0 0 1 .5 3 15.3 15.3 0 0 1 0 1q0 4.4-1.7 8.2a21.4 21.4 0 0 1-4.5 6.6q-2.8 2.9-6.6 4.6Q39.4 70 35 70ZM14 14v14h21a7 7 0 0 0 2.3-.3 6.6 6.6 0 0 0 .4-.2Q39 27 40 26a6.9 6.9 0 0 0 1.5-2.2q.5-1.3.5-2.8a7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 17 40 16a7 7 0 0 0-2.3-1.4 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Zm0 28v14h21a7 7 0 0 0 2.3-.4 6.6 6.6 0 0 0 .4-.1Q39 54.9 40 54a7 7 0 0 0 1.5-2.2 6.9 6.9 0 0 0 .5-2.6 7.9 7.9 0 0 0 0-.2 7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 45 40 44a7 7 0 0 0-2.3-1.5 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Z"/></svg>

hub/site/public/static/favicon-red.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 56 70" fill="#dc2626"><path d="M35 70H0V0h35q4.4 0 8.2 1.7a21.4 21.4 0 0 1 6.6 4.5q2.9 2.8 4.5 6.6Q56 16.7 56 21a15.4 15.4 0 0 1-.3 3.2 17.6 17.6 0 0 1-.2.8 19.4 19.4 0 0 1-1.5 4 17 17 0 0 1-2.4 3.4 13.5 13.5 0 0 1-2.6 2.3 12.5 12.5 0 0 1-.4.3q1.7 1 3 2.5Q53 39.1 54 41a18.3 18.3 0 0 1 1.5 4 17.4 17.4 0 0 1 .5 3 15.3 15.3 0 0 1 0 1q0 4.4-1.7 8.2a21.4 21.4 0 0 1-4.5 6.6q-2.8 2.9-6.6 4.6Q39.4 70 35 70ZM14 14v14h21a7 7 0 0 0 2.3-.3 6.6 6.6 0 0 0 .4-.2Q39 27 40 26a6.9 6.9 0 0 0 1.5-2.2q.5-1.3.5-2.8a7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 17 40 16a7 7 0 0 0-2.3-1.4 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Zm0 28v14h21a7 7 0 0 0 2.3-.4 6.6 6.6 0 0 0 .4-.1Q39 54.9 40 54a7 7 0 0 0 1.5-2.2 6.9 6.9 0 0 0 .5-2.6 7.9 7.9 0 0 0 0-.2 7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 45 40 44a7 7 0 0 0-2.3-1.5 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Z"/></svg>

hub/site/public/static/favicon.svg

@@ -1 +0,0 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 56 70" fill="#888"><path d="M35 70H0V0h35q4.4 0 8.2 1.7a21.4 21.4 0 0 1 6.6 4.5q2.9 2.8 4.5 6.6Q56 16.7 56 21a15.4 15.4 0 0 1-.3 3.2 17.6 17.6 0 0 1-.2.8 19.4 19.4 0 0 1-1.5 4 17 17 0 0 1-2.4 3.4 13.5 13.5 0 0 1-2.6 2.3 12.5 12.5 0 0 1-.4.3q1.7 1 3 2.5Q53 39.1 54 41a18.3 18.3 0 0 1 1.5 4 17.4 17.4 0 0 1 .5 3 15.3 15.3 0 0 1 0 1q0 4.4-1.7 8.2a21.4 21.4 0 0 1-4.5 6.6q-2.8 2.9-6.6 4.6Q39.4 70 35 70ZM14 14v14h21a7 7 0 0 0 2.3-.3 6.6 6.6 0 0 0 .4-.2Q39 27 40 26a6.9 6.9 0 0 0 1.5-2.2q.5-1.3.5-2.8a7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 17 40 16a7 7 0 0 0-2.3-1.4 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Zm0 28v14h21a7 7 0 0 0 2.3-.4 6.6 6.6 0 0 0 .4-.1Q39 54.9 40 54a7 7 0 0 0 1.5-2.2 6.9 6.9 0 0 0 .5-2.6 7.9 7.9 0 0 0 0-.2 7 7 0 0 0-.4-2.3 6.6 6.6 0 0 0-.1-.4Q40.9 45 40 44a7 7 0 0 0-2.3-1.5 6.9 6.9 0 0 0-2.5-.6 7.9 7.9 0 0 0-.2 0H14Z"/></svg>

hub/site/public/static/gitea.svg

@@ -1 +0,0 @@
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