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gha/e2e: Also test against moby master - #7359
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Add a "master" engine-version to the e2e matrix to catch regressions against the upcoming engine release before it reaches an rc. There is no "master" dind image, so just copy the engine binary from the moby/moby-bin:master image and put it into the latest dind image. Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
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docker-agent
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Oct 7, 2026
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Assessment: 🟢 APPROVE
The multi-stage Dockerfile pattern is correct. moby/moby-bin:master stores its daemon binaries directly at the root of the image filesystem (/dockerd, /containerd, /docker-proxy), so COPY --link --from=moby/moby-bin:master / /usr/local/bin/ correctly places them at /usr/local/bin/dockerd etc. — the implementation matches the intent.
Dismissed security findings (review manually)
e2e/testdata/Dockerfile.connhelper-ssh:13 —moby/moby-bin:masteris a mutable tag (verifier mitigation: intentional by design — the test's purpose is to track Moby master; pinning a digest would defeat it; test-only context, not production)e2e/testdata/engine/Dockerfile:9 —moby/moby-bin:masteris a mutable tag (verifier mitigation: same as above — intentional design for a test that tracks the bleeding-edge engine release)
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Assessment: 🟢 APPROVE
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Add a "master" engine-version to the e2e matrix to catch regressions against the upcoming engine release before it reaches an rc.
There is no "master" dind image, so just copy the engine binary from the moby/moby-bin:master image and put it into the latest dind image.
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