release 0.5.2

fix(package-lock.json): fix for nixpkgs

beszel/internal/agent/agent.go

@@ -13,6 +13,8 @@ import (
 
 type Agent struct {
 	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
 	netInterfaces    map[string]struct{}        // Stores all valid network interfaces
@@ -26,6 +28,7 @@ type Agent struct {
 func NewAgent() *Agent {
 	return &Agent{
 		sensorsContext: context.Background(),
+		memCalc:        os.Getenv("MEM_CALC"),
 	}
 }
 

beszel/internal/agent/system.go

@@ -3,9 +3,12 @@ package agent
 import (
 	"beszel"
 	"beszel/internal/entities/system"
+	"bufio"
+	"fmt"
 	"log/slog"
 	"os"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/shirou/gopsutil/v4/cpu"
@@ -36,6 +39,13 @@ func (a *Agent) initializeSystemInfo() {
 			a.systemInfo.Threads = threads
 		}
 	}
+
+	// zfs
+	if _, err := getARCSize(); err == nil {
+		a.zfs = true
+	} else {
+		slog.Debug("Not monitoring ZFS ARC", "err", err)
+	}
 }
 
 // Returns current info, stats about the host system
@@ -52,12 +62,30 @@ func (a *Agent) getSystemStats() system.Stats {
 
 	// memory
 	if v, err := mem.VirtualMemory(); err == nil {
-		systemStats.Mem = bytesToGigabytes(v.Total)
-		systemStats.MemUsed = bytesToGigabytes(v.Used)
-		systemStats.MemBuffCache = bytesToGigabytes(v.Total - v.Free - v.Used)
-		systemStats.MemPct = twoDecimals(v.UsedPercent)
+		// swap
 		systemStats.Swap = bytesToGigabytes(v.SwapTotal)
-		systemStats.SwapUsed = bytesToGigabytes(v.SwapTotal - v.SwapFree)
+		systemStats.SwapUsed = bytesToGigabytes(v.SwapTotal - v.SwapFree - v.SwapCached)
+		// cache + buffers value for default mem calculation
+		cacheBuff := v.Total - v.Free - v.Used
+		// htop memory calculation overrides
+		if a.memCalc == "htop" {
+			// note: gopsutil automatically adds SReclaimable to v.Cached
+			cacheBuff = v.Cached + v.Buffers - v.Shared
+			v.Used = v.Total - (v.Free + cacheBuff)
+			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
@@ -154,7 +182,7 @@ func (a *Agent) getSystemStats() system.Stats {
 		systemStats.Temperatures = make(map[string]float64, len(temps))
 		for i, sensor := range temps {
 			// skip if temperature is 0
-			if sensor.Temperature == 0 {
+			if sensor.Temperature <= 0 || sensor.Temperature >= 200 {
 				continue
 			}
 			if _, ok := systemStats.Temperatures[sensor.SensorKey]; ok {
@@ -183,3 +211,29 @@ func (a *Agent) getSystemStats() system.Stats {
 
 	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")
+}

beszel/internal/entities/system/system.go

@@ -11,6 +11,7 @@ type Stats struct {
 	MemUsed      float64             `json:"mu"`
 	MemPct       float64             `json:"mp"`
 	MemBuffCache float64             `json:"mb"`
+	MemZfsArc    float64             `json:"mz,omitempty"` // ZFS ARC memory
 	Swap         float64             `json:"s,omitempty"`
 	SwapUsed     float64             `json:"su,omitempty"`
 	DiskTotal    float64             `json:"d"`

beszel/site/src/components/charts/mem-chart.tsx

@@ -1,16 +1,8 @@
 import { Area, AreaChart, CartesianGrid, XAxis, YAxis } from 'recharts'
 
 import { ChartContainer, ChartTooltip, ChartTooltipContent } from '@/components/ui/chart'
-import {
-	useYAxisWidth,
-	chartTimeData,
-	cn,
-	formatShortDate,
-	toFixedFloat,
-	twoDecimalString,
-} from '@/lib/utils'
+import { useYAxisWidth, chartTimeData, cn, toFixedFloat, twoDecimalString } from '@/lib/utils'
 import { useMemo } from 'react'
-// import Spinner from '../spinner'
 import { useStore } from '@nanostores/react'
 import { $chartTime } from '@/lib/stores'
 import { SystemStatsRecord } from '@/types'
@@ -79,16 +71,16 @@ export default function MemChart({
 						content={
 							<ChartTooltipContent
 								// @ts-ignore
-								itemSorter={(a, b) => a.name.localeCompare(b.name)}
-								labelFormatter={(_, data) => formatShortDate(data[0].payload.created)}
+								itemSorter={(a, b) => a.order - b.order}
 								contentFormatter={(item) => twoDecimalString(item.value) + ' GB'}
 								indicator="line"
 							/>
 						}
 					/>
 					<Area
-						dataKey="stats.mu"
 						name="Used"
+						order={3}
+						dataKey="stats.mu"
 						type="monotoneX"
 						fill="hsl(var(--chart-2))"
 						fillOpacity={0.4}
@@ -96,9 +88,23 @@ export default function MemChart({
 						stackId="1"
 						isAnimationActive={false}
 					/>
+					{systemData.at(-1)?.stats.mz && (
+						<Area
+							name="ZFS ARC"
+							order={2}
+							dataKey="stats.mz"
+							type="monotoneX"
+							fill="hsla(175 60% 45% / 0.8)"
+							fillOpacity={0.5}
+							stroke="hsla(175 60% 45% / 0.8)"
+							stackId="1"
+							isAnimationActive={false}
+						/>
+					)}
 					<Area
-						dataKey="stats.mb"
 						name="Cache / Buffers"
+						order={1}
+						dataKey="stats.mb"
 						type="monotoneX"
 						fill="hsla(160 60% 45% / 0.5)"
 						fillOpacity={0.4}

beszel/site/src/types.d.ts

@@ -43,6 +43,8 @@ export interface SystemStats {
 	mp: number
 	/** memory buffer + cache (gb) */
 	mb: number
+	/** zfs arc memory (gb) */
+	mz?: number
 	/** swap space (gb) */
 	s: number
 	/** swap used (gb) */

beszel/version.go

@@ -1,6 +1,6 @@
 package beszel
 
 const (
-	Version = "0.5.1"
+	Version = "0.5.2"
 	AppName = "beszel"
 )

readme.md

@@ -105,20 +105,21 @@ Use `./beszel update` and `./beszel-agent update` to update to the latest versio
 
 ### Agent
 
-| Name                | Default | Description                                                                              |
-| ------------------- | ------- | ---------------------------------------------------------------------------------------- |
-| `DOCKER_HOST`       | unset   | Overrides the docker host (docker.sock) if using a proxy.[^socket]                       |
+| Name                | Default | Description                                                                                                               |
+| ------------------- | ------- | ------------------------------------------------------------------------------------------------------------------------- |
+| `DOCKER_HOST`       | unset   | Overrides the docker host (docker.sock) if using a proxy.[^socket]                                                        |
 | `EXTRA_FILESYSTEMS` | unset   | See [Monitoring additional disks, partitions, or remote mounts](#monitoring-additional-disks-partitions-or-remote-mounts) |
-| `FILESYSTEM`        | unset   | Device, partition, or mount point to use for root disk stats.                            |
-| `KEY`               | unset   | Public SSH key to use for authentication. Provided in hub.                               |
-| `LOG_LEVEL`         | info    | Logging level. Valid values: "debug", "info", "warn", "error".                           |
-| `NICS`              | unset   | Whitelist of network interfaces to monitor for bandwidth chart.                          |
-| `PORT`              | 45876   | Port or address:port to listen on.                                                       |
-| `SENSORS`           | unset   | Whitelist of temperature sensors to monitor.                                             |
-
-<!-- | `SYS_SENSORS` | unset | Overrides the sys location for sensors. | -->
+| `FILESYSTEM`        | unset   | Device, partition, or mount point to use for root disk stats.                                                             |
+| `KEY`               | unset   | Public SSH key to use for authentication. Provided in hub.                                                                |
+| `LOG_LEVEL`         | info    | Logging level. Valid values: "debug", "info", "warn", "error".                                                            |
+| `MEM_CALC`          | unset   | Overrides the default memory calculation.[^memcalc]                                                                       |
+| `NICS`              | unset   | Whitelist of network interfaces to monitor for bandwidth chart.                                                           |
+| `PORT`              | 45876   | Port or address:port to listen on.                                                                                        |
+| `SENSORS`           | unset   | Whitelist of temperature sensors to monitor.                                                                              |
+| `SYS_SENSORS`       | unset   | Overrides sys path for sensors. See [#160](https://github.com/henrygd/beszel/discussions/160).                            |
 
 [^socket]: Beszel only needs access to read container information. For [linuxserver/docker-socket-proxy](https://github.com/linuxserver/docker-socket-proxy) you would set `CONTAINERS=1`.
+[^memcalc]: The default value for used memory is based on gopsutil's [Used](https://pkg.go.dev/github.com/shirou/gopsutil/v4@v4.24.6/mem#VirtualMemoryStat) calculation, which should align fairly closely with `free`. Set `MEM_CALC` to `htop` to align with htop's calculation.
 
 ## OAuth / OIDC Setup