Fix: use buildx imagetools for multi-arch manifest creation#387
Merged
fuziontech merged 1 commit intomainfrom Apr 2, 2026
Merged
Fix: use buildx imagetools for multi-arch manifest creation#387fuziontech merged 1 commit intomainfrom
fuziontech merged 1 commit intomainfrom
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docker/build-push-action pushes single-platform manifest lists, not
plain images. `docker manifest create` cannot compose manifest lists
from other manifest lists ("is a manifest list" error). Switch to
`docker buildx imagetools create` which handles this correctly.
Also captures the manifest digest via `imagetools inspect` for the
deployment payload.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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Summary
Fixes the manifest job failure from #386:
docker manifest createfails with "is a manifest list" becausedocker/build-push-actionpushes single-platform manifest lists, not plain images.docker manifest createcannot nest manifest lists.Switches to
docker buildx imagetools createwhich correctly unwraps the per-arch manifest lists and composes a proper multi-arch manifest. Also addssetup-buildx-actionto the manifest job and captures the digest viaimagetools inspect.Failed run: https://github.com/PostHog/duckgres/actions/runs/23882512533/job/69638953796
Test plan
🤖 Generated with Claude Code