Support reproducible builds (except packages)#915
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See docker-library/official-images issue 16044 - `SOURCE_DATE_EPOCH` is added. The value is consumed by the build scripts to make the binary reproducible. - For Debian, `/var/log/*` is removed as they contain timestamps - For Debian, `/var/cache/ldconfig/aux-cache` is removed as they contain inode numbers, etc. - For Alpine, virtual package versions are pinned to "0" to eliminate the timestamp-based version numbers that appear in `/etc/apk/world` and `/lib/apk/db/installed` - For Alpine, `/var/cache/fontconfig` is removed > [!NOTE] > The following topics are NOT covered by this commit: > > - To reproduce file timestamps in layers, BuildKit has to be executed with > `--output type=<TYPE>,rewrite-timestamp=true`. > Needs BuildKit v0.13 or later. > > - To reproduce the base image by the hash, reproducers may: > - modify the `FROM` instruction in Dockerfile manually > - or, use the `CONVERT` action of source policies to replace the base image. > <https://github.com/moby/buildkit/blob/v0.13.2/docs/build-repro.md> > > - To reproduce packages, see the `RUN` instruction hook proposed in > moby/buildkit issue 4576 Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
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See:
SOURCE_DATE_EPOCHis added. The value is consumed by the build scripts to make the binary reproducible.For Debian,
/var/log/*is removed as they contain timestampsFor Debian,
/var/cache/ldconfig/aux-cacheis removed as they contain inode numbers, etc.For Alpine, virtual package versions are pinned to "0" to eliminate the timestamp-based version numbers that appear in
/etc/apk/worldand/lib/apk/db/installedFor Alpine,
/var/cache/fontconfigis removedNote
The following topics are NOT covered by this commit:
To reproduce file timestamps in layers, BuildKit has to be executed with
--output type=<TYPE>,rewrite-timestamp=true.Needs BuildKit v0.13 or later.
To reproduce the base image by the hash, reproducers may:
FROMinstruction in Dockerfile manuallyCONVERTaction of source policies to replace the base image.https://github.com/moby/buildkit/blob/v0.13.2/docs/build-repro.md
To reproduce packages, see the
RUNinstruction hook proposed inProposal: hooks for
RUNinstructions (use cases: reproducible builds, cross-compilation, malware detection, ...) moby/buildkit#4576