Graham McIntire
5692d50a72
Previous Dockerfile compiled a 'fn main(){}' placeholder to warm the
dep cache, then was supposed to rebuild with real source — but cargo's
fingerprint wasn't picking up the re-added source after rm -rf, so the
placeholder artefact (~430 KB) was what got COPY'd into runtime.
Replace the stub-then-real dance with a single cache-mounted build.
BuildKit persists /usr/local/cargo/registry + git + /src/target across
runs, so dep changes are the only full-rebuild trigger. Copy the real
binary into /usr/local/bin/worker before the COPY --from= in runtime
because COPY --from= can't read from a cache mount.
59 lines
2.2 KiB
Docker
59 lines
2.2 KiB
Docker
# syntax=docker/dockerfile:1.7
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#
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# Multi-arch build for `prop-grid-rs`. wgrib2 isn't in Debian apt — the
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# Elixir image builds it from source in its own stage. Rather than
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# rebuild it here (~5 min per CI run), copy the binary + libg2c out of
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# the already-published Elixir image.
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#
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# Runtime uid 65534 matches the fsGroup on the NFS scores mount.
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ARG WGRIB2_IMAGE=git.mcintire.me/graham/prop:latest
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FROM ${WGRIB2_IMAGE} AS wgrib2-src
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FROM rust:1.94-trixie AS builder
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WORKDIR /src
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# Cache deps: copy manifests first so dependency changes alone don't
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# invalidate the source-layer cache.
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COPY Cargo.toml Cargo.lock* ./
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COPY src ./src
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COPY tests ./tests
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# BuildKit cache mounts persist cargo's registry + git + target
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# directories across CI runs, so dependency changes are the only
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# thing that triggers a full rebuild. Lint + test gate the image
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# build — a regressed scorer or a clippy warning never produces a
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# pushable image. `target/` is cached but the final binary is
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# copied out into a non-cached path so the runtime stage can reach
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# it (COPY --from= can't read from a cache mount).
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RUN --mount=type=cache,target=/usr/local/cargo/registry,sharing=locked \
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--mount=type=cache,target=/usr/local/cargo/git,sharing=locked \
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--mount=type=cache,target=/src/target,sharing=locked \
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rustup component add clippy \
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&& cargo clippy --all-targets -- -D warnings \
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&& cargo test --release \
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&& cargo build --release --bin worker \
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&& cp target/release/worker /usr/local/bin/worker
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# Runtime image: slim debian + the shared libs wgrib2 links against.
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# libgfortran5/libaec0/zlib1g/libpng16-16t64/libopenjp2-7 mirror the
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# Elixir runtime stage.
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FROM debian:trixie-slim AS runtime
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RUN apt-get update && apt-get install -y --no-install-recommends \
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ca-certificates \
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tini \
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libgfortran5 \
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libaec0 \
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zlib1g \
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libpng16-16t64 \
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libopenjp2-7 \
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&& rm -rf /var/lib/apt/lists/*
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COPY --from=wgrib2-src /usr/local/bin/wgrib2 /usr/local/bin/wgrib2
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COPY --from=wgrib2-src /usr/local/lib/libg2c.so* /usr/local/lib/
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RUN ldconfig
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COPY --from=builder /usr/local/bin/worker /usr/local/bin/prop-grid-rs
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USER 65534:65534
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ENTRYPOINT ["/usr/bin/tini", "--", "/usr/local/bin/prop-grid-rs"]
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