Container image retention #116
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| --- | |
| name: 'Container image retention' | |
| on: # yamllint disable-line rule:truthy | |
| push: | |
| branches: | |
| - 'main' | |
| paths: | |
| - '.github/workflows/container_image_retention.yml' | |
| schedule: | |
| - cron: '30 3 * * *' | |
| workflow_dispatch: {} | |
| permissions: | |
| contents: 'read' | |
| concurrency: | |
| group: 'ci-${{ github.workflow }}-${{ github.ref }}' | |
| cancel-in-progress: false | |
| env: | |
| # full image name including the complete path of the registry | |
| IMAGE_NAME: 'ghcr.io/${{ github.repository_owner }}/ansible-role-file_deployment-jekyll' | |
| # number of versions to keep | |
| KEEP_VERSIONS: 3 | |
| # regular expression for tags to filter/ignore | |
| IGNORE_TAGS: '^(latest|buildcache)$|^sha([[:digit:]]+?)?-' | |
| # additional tags to resolve and keep the digests from, comma-seperated | |
| ADDITIONAL_KEEP_TAGS: 'latest,buildcache' | |
| jobs: | |
| check-user-permissions: | |
| runs-on: 'ubuntu-24.04' | |
| permissions: | |
| contents: 'read' | |
| outputs: | |
| require-result: '${{ steps.check-access.outputs.require-result }}' | |
| steps: | |
| - name: 'Harden Runner' | |
| uses: 'step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7' # v2.10.1 | |
| with: | |
| egress-policy: 'block' | |
| allowed-endpoints: > | |
| api.github.com:443 | |
| github.com:443 | |
| - name: 'Get User Permissions' | |
| id: 'check-access' | |
| uses: 'actions-cool/check-user-permission@956b2e73cdfe3bcb819bb7225e490cb3b18fd76e' # v2.2.1 | |
| with: | |
| require: 'write' | |
| username: '${{ github.triggering_actor }}' | |
| env: | |
| GITHUB_TOKEN: '${{ secrets.token }}' | |
| - name: 'Check User Permission' | |
| if: "steps.check-access.outputs.require-result == 'false'" | |
| shell: 'bash' | |
| run: | | |
| # fail if: | |
| # - a variable is unbound | |
| # - any command fails | |
| # - a command in a pipe fails | |
| # - a command in a sub-shell fails | |
| set -Eeuo pipefail | |
| # enable debug if runner runs in debug | |
| [[ "${{ runner.debug }}" -ne 1 ]] || { | |
| echo "INFO: Enabling bash trace"; | |
| set -x; | |
| }; | |
| echo "${{ github.triggering_actor }} does not have permissions on this repo." | |
| echo "Current permission level is ${{ steps.check-access.outputs.user-permission }}" | |
| echo "Job originally triggered by ${{ github.actor }}" | |
| prepare-vars: | |
| name: 'Prepare variables for building the container image' | |
| if: "needs.check-user-permissions.outputs.require-result == 'true'" | |
| needs: 'check-user-permissions' | |
| runs-on: 'ubuntu-24.04' | |
| container: | |
| # yamllint disable-line rule:line-length | |
| image: 'registry.access.redhat.com/ubi9/podman:9.4-14.1728871566@sha256:8b48dc911e206b26e79be0da8a393c245d5d2f1a67b50cc47cdbdcc8c690109d' | |
| options: '--privileged' | |
| outputs: | |
| action-debug: '${{ steps.prepare-vars.outputs.action-debug }}' | |
| short-image-name: '${{ steps.prepare-vars.outputs.short-image-name }}' | |
| skip-digests: '${{ steps.prepare-vars.outputs.skip-digests }}' | |
| skip-tags: '${{ steps.prepare-vars.outputs.skip-tags }}' | |
| steps: | |
| - name: 'Prepare variables' | |
| id: 'prepare-vars' | |
| shell: 'bash' | |
| run: | | |
| # fail if: | |
| # - a variable is unbound | |
| # - any command fails | |
| # - a command in a pipe fails | |
| # - a command in a sub-shell fails | |
| set -Eeuo pipefail | |
| echo "action-debug=container_retention_policy=info" >> "${GITHUB_OUTPUT}" | |
| # enable debug if runner runs in debug | |
| [[ "${{ runner.debug }}" -ne 1 ]] || { | |
| echo "INFO: Enabling bash trace"; | |
| set -x; | |
| echo "INFO: Defining 'action-debug' with: container_retention_policy=debug"; | |
| echo "action-debug=container_retention_policy=debug" >> "${GITHUB_OUTPUT}"; | |
| }; | |
| # install jq | |
| dnf install -y jq | |
| # podman arguments to search for tags | |
| declare -ra podmanArguments=( | |
| "search" | |
| "--list-tags" | |
| "--no-trunc" | |
| "--limit" | |
| "999999" | |
| "--format" | |
| "{{.Tag}}" | |
| "${{ env.IMAGE_NAME }}" | |
| ) | |
| # retrieve all tags for the image, sort it reverse and keep the last N versions | |
| read -ra keepTags <<<"$(podman "${podmanArguments[@]}" | \ | |
| grep -vE "${{ env.IGNORE_TAGS }}" | \ | |
| sort -Vr | \ | |
| head -n "${{ env.KEEP_VERSIONS }}" | \ | |
| xargs \ | |
| )" | |
| # add additional user tags to keep | |
| IFS="," read -ra additionalKeepTags <<< "${{ env.ADDITIONAL_KEEP_TAGS }}" | |
| declare -a allKeepTags=("${keepTags[@]}" "${additionalKeepTags[@]}") | |
| # iterate over all tags and retrieve their digests | |
| declare -a skipDigests=() | |
| for keepTag in "${allKeepTags[@]}"; do | |
| echo "INFO: Retrieving digests for tag ${keepTag}" | |
| while read -r digest; do | |
| echo "INFO: Found digest '${digest}'" | |
| skipDigests+=("${digest}") | |
| done < <(podman manifest inspect "${{ env.IMAGE_NAME }}:${keepTag}" | jq -r '.manifests[] | .digest') | |
| # ^ extract the digests of a tag | |
| done | |
| # prepare tags to skip | |
| declare -a skipTags=() | |
| for tag in "${allKeepTags[@]}"; do | |
| skipTags+=("!${tag}") | |
| done | |
| echo "INFO: Defining 'skip-tags' with value: ${skipTags[@]}" | |
| echo "skip-tags=${skipTags[@]}" >> "${GITHUB_OUTPUT}" | |
| # save the digests for a later step | |
| echo "INFO: Defining 'skip-digests' with value: ${skipDigests[@]}" | |
| echo "skip-digests=${skipDigests[@]}" >> "${GITHUB_OUTPUT}" | |
| declare -r imageName="${{ env.IMAGE_NAME }}" | |
| declare -r shortImageName="${imageName##*/}" | |
| # save the image short name (without registry path) | |
| echo "INFO: Defininig 'short-image-name' with value: ${shortImageName}" | |
| echo "short-image-name=${shortImageName}" >> "${GITHUB_OUTPUT}" | |
| container-image-retention: | |
| name: 'Clean old container images' | |
| if: "needs.check-user-permissions.outputs.require-result == 'true'" | |
| needs: | |
| - 'check-user-permissions' | |
| - 'prepare-vars' | |
| runs-on: 'ubuntu-24.04' | |
| permissions: | |
| packages: 'write' | |
| steps: | |
| - name: 'Harden Runner' | |
| uses: 'step-security/harden-runner@91182cccc01eb5e619899d80e4e971d6181294a7' # v2.10.1 | |
| with: | |
| disable-sudo: true | |
| egress-policy: 'block' | |
| allowed-endpoints: > | |
| api.github.com:443 | |
| github.com:443 | |
| - name: 'Delete container versions' | |
| uses: 'snok/container-retention-policy@4f22ef80902ad409ed55a99dc5133cc1250a0d03' # v3.0.0 | |
| with: | |
| account: 'user' | |
| cut-off: '1m' | |
| image-names: '${{ needs.prepare-vars.outputs.short-image-name }}' | |
| image-tags: '${{ needs.prepare-vars.outputs.skip-tags }}' | |
| keep-n-most-recent: '${{ env.KEEP_VERSIONS }}' | |
| token: '${{ secrets.GITHUB_TOKEN }}' | |
| tag-selection: 'both' | |
| skip-shas: '${{ needs.prepare-vars.outputs.skip-digests }}' | |
| timestamp-to-use: 'created_at' | |
| dry-run: false | |
| rust-log: '${{ needs.prepare-vars.outputs.action-debug }}' | |
| ... |