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ci: use native arm64 runners and dynamic matrix from images.json - #95
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middelkoopt merged 3 commits intoJun 22, 2026
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* AlmaLinux 9: add 9.8 (fixed mirrors), keep 9.7 (vault) * AlmaLinux 10: add 10.2 (fixed mirrors), keep 10.1 (vault) * README: add openSUSE Tumbleweed, Debian, Ubuntu to built examples list * Rocky Linux 9.8/10.2 upgrade Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Signed-off-by: Timothy Middelkoop <tmiddelkoop@internet2.edu>
Replace QEMU-emulated multi-arch builds with native runners: linux/amd64 on ubuntu-latest, linux/arm64 on ubuntu-24.04-arm. Introduce images.json as the single source of truth for all image configurations. A new gen-matrix.py script generates both the build matrix (images x arches) and merge matrix (images only) at workflow runtime, so adding an image or arch requires editing only images.json. The build job pushes single-platform images by content-addressed digest. A separate merge job assembles the multi-arch manifest index with imagetools create, then signs it with cosign via GitHub OIDC. Also add oci-mediatypes=true to preserve index-level annotations on GHCR. Co-authored-by: Claude <noreply@anthropic.com> Signed-off-by: Timothy Middelkoop <tmiddelkoop@internet2.edu>
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Updated Rocky 9.8 and 10.2 to #94 and here. |
The images to build are once again defined in container-publish.yml (albeit with inline-style syntax for readability) but the build job is now responsible for constructing a manifest of digsts for the merge job to consume. Signed-off-by: Jonathon Anderson <janderson@ciq.com>
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@middelkoopt I merged this all back into container-publish.yml and then had the build job export the digests to build for merge to consume. I kept the tabular-style encoding for images, but I think this makes it even cleaner. I'll approve it for now, but I'll leave it to you to merge in case you disagree.
edit: I did a walkthrough of this on YT as an experiment if you're interested. https://youtu.be/Q8mgqrJXDUk
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Reviewed. Changes look much better, thanks for taking it over the line. The video helped. |
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Replace QEMU-emulated multi-arch builds with native runners:
linux/amd64 on ubuntu-latest, linux/arm64 on ubuntu-24.04-arm.
Introduce images.json as the single source of truth for all image
configurations. A new gen-matrix.py script generates both the build
matrix (images x arches) and merge matrix (images only) at workflow
runtime, so adding an image or arch requires editing only images.json.
The build job pushes single-platform images by content-addressed digest.
A separate merge job assembles the multi-arch manifest index with
imagetools create, then signs it with cosign via GitHub OIDC.
Also add oci-mediatypes=true to preserve index-level annotations on GHCR.
The tumbleweed image was failing due to qemu seg-faulting.
NOTE: This is on top of the update to EL9.8 and 10.2 PR #94
Rocky 9.8 and 10.2 Docker images have yet to be published.
AlmaLinux and tumbleweed containers pulled and tested on x86_64 and aarch64