[release-1.35] fix: use native platform for Dockerfile builder stage to avoid QEMU arm64 failures#3164
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k8s-ci-robot merged 2 commits intoMay 19, 2026
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The builder stage only needs to download azcopy binaries and the Microsoft apt repo deb. Running apt install under QEMU emulation for arm64 intermittently fails with 'Exec format error' when binfmt registration is unstable in CI Docker-in-Docker environments. By using --platform=$BUILDPLATFORM, the builder always runs natively (amd64) and downloads the correct arch-specific azcopy binary via TARGETARCH, eliminating the QEMU dependency for this stage.
Give TARGETARCH a default of 'amd64' so the azcopy download URL is always valid even when not running under BuildKit/buildx.
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[APPROVALNOTIFIER] This PR is APPROVED This pull-request has been approved by: andyzhangx, k8s-infra-cherrypick-robot The full list of commands accepted by this bot can be found here. The pull request process is described here DetailsNeeds approval from an approver in each of these files:
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This is an automated cherry-pick of #3157
/assign andyzhangx