J Logan d29947121f CI observability enhancements. (#1193)
- Adds a a `--log-root` option to `swift system start`, propagating the
value as `CONTAINER_LOG_ROOT` to services for logging to files instead
of the OS log facility. This is not a "production" capability as it
neither merges nor rotates logs.
- Currently we don't collect logs on CI builds, and we don't have
permission to run the `log` command there. The PR adds `--log-root` to
the CI test phase, archives the results, and uploads the archive as an
artifact.
- Use FilePath from swift-system for the log root. Foundation URL is a
bit of a footgun for filesystem paths, so unless we identify a
showstopper, we should incrementally transition to this type everywhere
except where we really need network URLs.
- Output the hostname of the CI runner at the start of the test phase so
we can identify runner-specific issues where they exist.
- Fix formatting for log messages with multiple metadata items, and fix
unstructured messages on instances that weren't found using `grep -r
'log\.' Sources`.
- Adds command reference documentation for `--log-root`.
2026-02-19 17:47:41 -08:00
2025-06-05 15:51:55 -07:00
2026-01-06 08:27:14 -08:00
2025-06-05 15:51:55 -07:00
2025-06-05 15:51:55 -07:00

container

container is a tool that you can use to create and run Linux containers as lightweight virtual machines on your Mac. It's written in Swift, and optimized for Apple silicon.

The tool consumes and produces OCI-compatible container images, so you can pull and run images from any standard container registry. You can push images that you build to those registries as well, and run the images in any other OCI-compatible application.

container uses the Containerization Swift package for low level container, image, and process management.

introductory movie showing some basic commands

Get started

Requirements

You need a Mac with Apple silicon to run container. To build it, see the BUILDING document.

container is supported on macOS 26, since it takes advantage of new features and enhancements to virtualization and networking in this release. We do not support older versions of macOS and the container maintainers typically will not address issues that cannot be reproduced on the macOS 26.

Install or upgrade

If you're upgrading, first stop and uninstall your existing container (the -k flag keeps your user data, while -d removes it):

container system stop
/usr/local/bin/uninstall-container.sh -k

Download the latest signed installer package for container from the GitHub release page.

To install the tool, double-click the package file and follow the instructions. Enter your administrator password when prompted, to give the installer permission to place the installed files under /usr/local.

Start the system service with:

container system start

Uninstall

Use the uninstall-container.sh script (installed to /usr/local/bin) to remove container from your system. To remove your user data along with the tool, run:

/usr/local/bin/uninstall-container.sh -d

To retain your user data so that it is available should you reinstall later, run:

/usr/local/bin/uninstall-container.sh -k

Next steps

Contributing

Contributions to container are welcomed and encouraged. Please see our main contributing guide for more information.

Project Status

The container project is currently under active development. Its stability, both for consuming the project as a Swift package and the container tool, is only guaranteed within patch versions, such as between 0.1.1 and 0.1.2. Minor version number releases may include breaking changes until we achieve a 1.0.0 release.

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