Cleanup GHCR Buildcache #14
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| # GHCR Buildcache Cleanup | |
| # | |
| # The Spack CI (spack.yml) pushes binary packages to an OCI buildcache at | |
| # ghcr.io/awslabs/palace-develop-testing. Over time, this accumulates stale | |
| # versions as dependencies get rebuilt with new hashes. | |
| # | |
| # This workflow periodically prunes old versions, keeping the most recent ones | |
| # so that the cache remains useful without growing unboundedly. | |
| # | |
| # ## How GHCR package linking works | |
| # | |
| # GitHub Packages (GHCR) can be linked to a repository, which grants repo | |
| # collaborators with write access the ability to manage packages. This link | |
| # also allows the GITHUB_TOKEN in workflows to delete package versions. | |
| # | |
| # The link is established by adding an OCI config label: | |
| # | |
| # org.opencontainers.image.source=https://github.com/awslabs/palace | |
| # | |
| # We used `crane mutate --label` to add this to a tag in the package, which | |
| # caused GHCR to auto-link the package to this repo. Once linked, the | |
| # association persists at the GitHub level regardless of individual tag labels. | |
| # | |
| # If the package is ever deleted and recreated (e.g., a full cache rebuild), | |
| # the link must be re-established. To do this: | |
| # | |
| # 1. Install crane: https://github.com/google/go-containerregistry | |
| # 2. Authenticate: echo $TOKEN | crane auth login ghcr.io -u USER --password-stdin | |
| # 3. Label any tag: | |
| # crane mutate ghcr.io/awslabs/palace-develop-testing:index.spack \ | |
| # --label org.opencontainers.image.source=https://github.com/awslabs/palace | |
| # 4. Verify the link: | |
| # gh api orgs/awslabs/packages/container/palace-develop-testing \ | |
| # --jq '.repository.full_name' | |
| # | |
| # Or as a GitHub Actions step: | |
| # | |
| # - name: Install crane | |
| # run: | | |
| # curl -sL "https://github.com/google/go-containerregistry/releases/download/v0.20.3/go-containerregistry_Linux_x86_64.tar.gz" \ | |
| # | tar xz -C /usr/local/bin crane | |
| # | |
| # - name: Link GHCR package to repository | |
| # run: | | |
| # echo "${{ secrets.GITHUB_TOKEN }}" | crane auth login ghcr.io -u ${{ github.actor }} --password-stdin | |
| # crane mutate ghcr.io/awslabs/palace-develop-testing:index.spack \ | |
| # --label org.opencontainers.image.source=https://github.com/${{ github.repository }} | |
| name: Cleanup GHCR Buildcache | |
| on: | |
| schedule: | |
| - cron: '0 6,18 * * *' # Twice daily at 6:00 and 18:00 UTC | |
| workflow_dispatch: | |
| permissions: | |
| packages: write | |
| jobs: | |
| cleanup: | |
| runs-on: ubuntu-latest | |
| steps: | |
| # Each Spack spec is a tagged version in the container package. We keep | |
| # the most recent 500 versions (roughly 5-10 full build sets) and delete | |
| # older ones. The action deletes at most 100 per run. | |
| - name: Delete old buildcache versions | |
| uses: actions/delete-package-versions@v5 | |
| with: | |
| package-name: palace-develop-testing | |
| package-type: container | |
| owner: awslabs | |
| min-versions-to-keep: 500 | |
| token: ${{ secrets.GITHUB_TOKEN }} |