CI/CD Images

These images can be used as building blocks for your Google Cloud CI/CD tasks. Common tools and helper binaries that make it easy to perform common operations like building source code, or issuing gcloud commands are included.

Preview images are available at us-docker.pkg.dev/gcb-catalog-release/preview. Preview images are under early development and may change during the preview period without notice.

To file issues and feature requests against these images, create an issue in this repo.

Development

The top-level directory acts as a standard Go module. Command line binaries that are added in images are included in the cmd directory.

Images Directory

The images directory contains the source for individual images. Each sub-directory within the images directory holds the source for one or more images. At minimum, the sub-directory has a Dockerfile, though it may also include other files (e.g helper scripts needed on the image).

We use Docker's Bake command to configure build of images. Bake lets us describe the build for each image declaratively, and specify that images have dependencies on other images. Specifying dependencies with Bake gives us the ability to detect breakages in child images caused by a parent image.

A new directory must include a Dockerfile and a Makefile. You must also add the new directory as a SUBDIR in the main images directory Makefile.

To release an image, add it to the cloudbuild.yaml file.

Note: there are a number of places a released image reference must appear to ensure that it is built, scanned, and pushed appropriately.

To build locally, you can cd into any image directory and run make build to build the images in that directory, and make test to test them. If you want to run docker buildx bake ...<targets> directly, then only run it from the images directory.

Testing

For testing changes to Go binaries, you can simply run go test ./..., which will run all the package tests in the repository.

For testing changes to image, each image directory should have a Makefile that is responsible for building and testing the image. There is a simple ./presubmit.sh script that looks at changed image directories and runs make build test for each one.

Note: the ./presubmit.sh script assumes changes have been committed, and won't trigger for changes only to go binaries the image includes.

Known Issues

• Images from marketplace.gcr.io require authentication when building locally. For details on how to configure authentication, see gcloud CLI credential helper.

  In some cases, you might also need to run export BUILDKIT_NO_CLIENT_TOKEN=true (though restarting docker appears to also subvert the issue). This is presumably an issue with buildx.

• Using a remote cache to improve builds is blocked on GitHub Docker/buildx issue 2144.

• Building all images might exhaust some system resources. If working on cross-cutting changes that require re-building multiple images, you might need to periodically run docker buildx prune.