ci: use multiarch runners for docker builds #379
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iainlane
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Oct 17, 2025
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Thanks for this! Just had a few comments which could all be due to my lack of understanding 😁
A general q: should we wait until grafana/shared-workflows#1348 is merged? As far as I can see we could use a reusable workflow since we don't do anything fancy...
| uses: grafana/shared-workflows/actions/docker-import-digests-push-manifest@cd422befbbda65e0612a63627e8c8820d86bc2a6 # docker-import-digests-push-manifest/v0.1.0 | ||
| with: | ||
| images: ${{ needs.build-and-export-digest.outputs.images }} | ||
| push: false |
| needs: build-and-export-digest | ||
| permissions: | ||
| contents: read | ||
| id-token: write |
| registries: "dockerhub" | ||
| platforms: ${{ matrix.platform }} | ||
| outputs: "type=image,push-by-digest=true,name-canonical=true,push=false" | ||
| push: false |
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Is it right that we're never pushing? Perhaps I'm understanding the flag incorrectly
| digest: ${{ steps.build.outputs.digest }} | ||
| platform: ${{ matrix.platform }} | ||
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| push-manifest: |
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Could this be conditional on whether we're pushing or not? We could skip the job on PRs, AFAIK
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This pull request refactors the Docker build workflow in
.github/workflows/build.ymlto improve support for multi-architecture images and streamline digest handling. The workflow now builds images for each platform separately, exports their digests, and then constructs a multi-arch manifest using those digests.Multi-Architecture Build and Digest Export:
mainjob with abuild-and-export-digestjob that uses a matrix strategy to build Docker images for bothlinux/arm64andlinux/amd64platforms, and exports their digests for later use.build-push-to-dockerhubaction to the newerdocker-build-push-imageaction.docker-export-digestaction.Manifest Construction:
push-manifestjob that depends on the completion of the multi-arch builds, and uses thedocker-import-digests-push-manifestaction to construct and upload a manifest referencing the built images for each architecture.