Optimize Debian image footprint using multi-stage builds#649
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YonathanZetune merged 1 commit intoJun 12, 2026
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This change optimizes the footprint of the Debian-based Cloud SDK Docker images using multi-stage builds.
It also includes the following fixes:
- Pin tonistiigi/binfmt to sha256:400a4873b838d1b89194d982c45e5fb3cda4593fbfd7e08a02e76b03b21166f0 (qemu-v10.2.3-68) for stability and security.
- Remove default '=amd64' from global ARG TARGETARCH and use ${TARGETARCH:-amd64} in FROM base-${TARGETARCH} to support correct platform resolution in BuildKit while falling back gracefully on legacy builders.
- Skip execution of emulated gcloud/kubectl version checks (which fail on 64KB page size hosts under QEMU user emulation due to 4KB segment alignment of bundled Python) by checking if target arch matches build arch.
- Write gcloud configurations directly to config files at build time to avoid running gcloud commands under emulation.
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Optimize Debian image footprint using multi-stage builds