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Strip symbol tables from the compiled extensions in the Docker image #2439

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Merged
Flix6x merged 7 commits into from
Aug 26, 2026
Merged

Strip symbol tables from the compiled extensions in the Docker image #2439

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0b697c7
fix: shrink docker image by excluding dev deps and pruning sktime's s…
TeaDrinkingProgrammer Aug 25, 2026
6429a11
docs: fill in the PR number in the changelog entry
Flix6x Aug 25, 2026
46f06e1
docker: strip symbol tables from the compiled extensions
Flix6x Aug 25, 2026
6987c0d
docs: widen the Docker image entry to cover the stripping
Flix6x Aug 25, 2026
12101ab
Merge main into fix/docker-strip-symbols
Flix6x Aug 25, 2026
f1b5ac9
docker: fail the build when strip is missing, instead of silently ski…
Flix6x Aug 25, 2026
2554df2
docker: break the strip comment only after punctuation
Flix6x Aug 26, 2026
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11 changes: 11 additions & 0 deletions Dockerfile
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Expand Up @@ -56,6 +56,17 @@ RUN --mount=type=cache,target=/root/.cache/uv \
RUN rm -rf "${VIRTUAL_ENV}"/lib/python*/site-packages/docs \
"${VIRTUAL_ENV}"/lib/python*/site-packages/examples

# Most wheels ship their compiled extensions unstripped, carrying symbol tables and debug info that nothing needs at runtime.
# Stripping them here keeps ~130 MB out of the runtime image, which copies only the result of this stage.
# --strip-unneeded leaves everything that dynamic linking uses, so the extensions stay loadable.
# binutils only reaches this stage as a transitive of the gcc install above, so check for strip explicitly:
# the trailing `|| true` is there for individual files strip cannot handle, and would otherwise hide a missing binutils.
RUN command -v strip > /dev/null || { \
echo "strip not found: the builder stage needs binutils" >&2; exit 1; \
}; \
find "${VIRTUAL_ENV}" \( -name '*.so' -o -name '*.so.*' \) -type f \
-exec strip --strip-unneeded {} + 2>/dev/null || true

# Use a separate runtime image to run the code
FROM python:${PYTHON_VERSION}-slim-${DEBIAN_VERSION} AS runtime

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2 changes: 1 addition & 1 deletion documentation/changelog.rst
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Expand Up @@ -13,7 +13,7 @@ New features

Infrastructure / Support
-------------------------
* Shrink the Docker image by excluding dev-only dependencies and pruning stray ``docs``/``examples`` payloads bundled by ``sktime``/``scikit-base`` (issue: https://github.com/sktime/sktime/issues/10891) [see `PR #2438 <https://www.github.com/FlexMeasures/flexmeasures/pull/2438>`_]
* Shrink the Docker image by excluding dev-only dependencies, pruning stray ``docs``/``examples`` payloads bundled by ``sktime``/``scikit-base`` (issue: https://github.com/sktime/sktime/issues/10891), and stripping the symbol tables that the compiled extensions ship with [see `PR #2438 <https://www.github.com/FlexMeasures/flexmeasures/pull/2438>`_ and `PR #2439 <https://www.github.com/FlexMeasures/flexmeasures/pull/2439>`_]

Bugfixes
-----------
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