If there's any nested cgroups in the one we made for the container
(commonly seen for systemd images) removeItem didn't seem to be having a
grand time, even though it states it should do recursive removals. Lets
roll our own, and have a small EBUSY/EAGAIN retry loop as well. This
fixes LinuxContainer.stop() for any containers with nested cgs.
Context: https://github.com/apple/container/issues/928
We'd like a way for people to know who they can ping for help on PRs and
issues, but we want to avoid being automatically assigned to PRs via
something like CODEOWNERS. Instead, we've opted to list the maintainers
of the project in a new MAINTAINERS file.
We opted to change from CONTRIBUTORS to MAINTAINERS since we believe
that contributors are already acknowledged via the `Contributors` tab on
GitHub and in the release notes we make for each new release.
In the future, the MAINTAINERS file can be extended to include
additional maintainers and past maintainers can continue to be
recognized for their work.
In a prior change I'd added a way for vminitd to double as a simple
pause container. This change wires this up by adding a new bool to the
pod config to ask for pid ns sharing.
Due to us supporting a pod type now, and pid ns sharing being quite a
common thing for pods, lets add a pause container like command to
vminitd to eventually enable pid ns sharing between containers in our
variant of a pod.
This changes vminitd slightly to have pause and init (default) commands
as it seemed simpler than creating a whole new binary to include in the
guest image.
Add support for parent death signal (pdeathSignal) to ensure child
processes receive a signal when the parent process dies. This addresses
the FIXME comment in Runc.execute().
## Changes
- Add pdeathSignal field to exec_command_attrs C struct
- Implement prctl(PR_SET_PDEATHSIG) in child process handler (Linux
only)
- Expose pdeathSignal through Command.Attrs Swift API
- Wire up pdeathSignal in Runc.execute() to remove FIXME
## Implementation Details
The implementation uses Linux-specific prctl() to set the parent death
signal, ensuring proper cleanup when parent processes terminate. The
feature is conditionally compiled for Linux only, maintaining
compatibility with other platforms.
Add a small bit of logic to monitor if vminitd goes over a (somewhat
arbitrary) memory threshold. On average, when running one container it
seems to hover around 25MiB, so this is mostly to catch cases where it's
exceeding a limit we don't deem normal.
Adds `calculateOrphanedBlobsSize()` to calculate the size of orphaned
blobs, will need this to include them under size and reclaimable space
for images in the `container system df` command so it matches up with
what `container image prune` frees up on disk.
- Fixes#417.
Rename `_prune()` to `cleanupOrphanedBlobs()` to clarify what it
actually does, and remove `prune()` method as we'll do all that logic in
container directly.
For the constructor we're using where we pass an already connected
socket, I'm not sure this even does anything, and if it does that's a
bug I'd rather just avoid altogether.
Also gets rid of the unused constructor we have to pass in a UDS.
Fixes#277
When vmexec fails, it logs to stderr and exits with code 1. Previously,
the error details were lost. This change captures stderr and converts it
into a proper ContainerizationError.
Signed-off-by: Rahul Thennarasu <rahulthennarasu07@gmail.com>
* on glibc, swift expects that the msg_controllen is type Int
* on glibc, socket shutdown options should be an Int32
Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>
Fixes#369
Per the OCI Image Spec, manifest descriptor annotations are optional.
Previously, archives without annotations would fail to import with
"Failed to import image".
**Changes:**
- Modified `getImageReferencefromDescriptor` to return digest-based
references (`untagged@sha256:...`) when annotations are missing
- Removed guard that skipped manifests without annotations
- Added test case with `scratch_no_annotations.tar`
**Testing:**
All 167 tests pass, including new test for images without annotations.
Taking in a filehandle gives the user quite a bit more freedom on how to
handle boot log output. They can set up a kqueue watch on it and
redirect output somewhere else etc etc. The implementation for this has
us take in a new BootLog type that has two options:
1. .file, which is analogous to what we had prior. Just provide a URL
and a true by default append field.
2. .fileHandle which is the new addition. Can pass any fd that is
writable, and the VMM should write serial console output to it.
This change is aimed at making forgetting to call .delete() on a
LinuxProcess less destructive than it can be. Because Virt.framework
invalidates any vsock fds it vended if the vm is stopped, trying to
perform some operations on the grpc client through any of the process
methods could trigger an ebadf, which NIO asserts on. This keeps a
reference to the execs and deletes all of them for you once the
container dies. I still think leaving .delete a public method is useful
as otherwise the stdio fds are left open, but cleanup should occur all
in one place now if you don't care about this.
This additionally:
1. Fixes two of our tests that forgot to delete() an exec.
2. Adds two new tests to verify that process.delete() is now idempotent,
and we don't need to call delete().
- Added README.md for examples directory to provide an overview and
instructions.
- Updated ctr-example README.md with clearer build and run instructions.
- Improved lab.md with a dynamic command to fetch the latest kernel.
Signed-off-by: Ihor Dvoretskyi <ihor@linux.com>
- We're already setting the default `HOME` and `TERM`. Setting the
default `PATH` as well seems reasonable.
- This PR also fixes the bug in retrieving the `PATH` value (`PATH=` has
to be removed, and `=` should be allowed in folder names).
Update containerization dependency in ctr-example to the latest tag of
containerization. Additionally make README for ctr-example more clear.
Signed-off-by: Kathryn Baldauf <k_baldauf@apple.com>
- Example Makefile now supports fetch-default-kernel for easier setup
- added 'make all' to build Containerization and ctr-example in one step
- Updated README to add build and run instructions
Add a test to ingest 200MiB of data across stdout/stderr. Useful to test
how fast we can ingest stdio. The timing will always be a tad off as it
times between start and wait returning, and there's quite a lot in the
way.. but it's a good enough metric.
Everytime we grab a vsock connection we dup the conn and close the
original, otherwise we'd need to carry around the vsock connection type
everywhere as it closes the fd in its destructor. We weren't checking
the return value of dup however, so if it did fail we'd have a useless
filehandle with an fd of -1.
Addresses apple/container#141, where containers don't receive filesystem
events on mounted volumes, preventing incremental rebuilds and other
file-watching features. This PR implements the guest-side components for
FSNotify. Host-side implementation in the container repo will complete
the pipeline.
Summary:
- Add gRPC protocol definitions for filesystem event notifications
- Implement guest-side event handler that generates Linux inotify events
- Add CLI testing tool (`cctl fsnotify`) and integration test
infrastructure
J Logan