3a74f8b5b0
* Modify Dockerfile - Use rustup from Docker image - Give up on cross compilation (ring issue) - Remove useless duplicate cargo install step - No need to specify target as it is built statically for the docker platform targeted - Shorten binary path output for shorter COPY * Github Actions to build for all ARM as well * Remove unneded musl-dev * Adapt build for all platforms - Use Debian based Rust for compilation - Cross compile on build platform - Compile static binaries using musl - Set variables correctly for all Docker supported platforms - Note: ppc64le, s390x and riscv64 do not support the Rust standard lib - Persist target platform variables through files - Define linkers in .cargo/config - Cache dependencies properly for target platform - Scratch stage to test the binary for target platform * Add 386 arch to CI * Use buildkit for docker build * Only build for amd64 on branches * Fix dependencies caching * Split dependencies fetching and compilation * Documentation * Build for all architectures on branch * Add STATIC build argument * Documentation
116 lines
3.8 KiB
Docker
116 lines
3.8 KiB
Docker
ARG BUILDPLATFORM=linux/amd64
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ARG ALPINE_VERSION=3.12
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ARG RUST_VERSION=1-slim-bullseye
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FROM --platform=${BUILDPLATFORM} rust:${RUST_VERSION} AS build
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WORKDIR /usr/src/prometheus_wireguard_exporter
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# Setup
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RUN apt-get update -y && \
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apt-get install -y \
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# to cross build with musl
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musl-tools \
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# to download the musl cross build tool
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wget \
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# for verifying the binary properties
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file
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# Download dependencies
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RUN mkdir src && \
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echo 'fn main() {}' > src/main.rs
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COPY Cargo.toml Cargo.lock ./
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RUN cargo fetch && \
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rm src/main.rs
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ARG STATIC=yes
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RUN touch /tmp/rustflags && \
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if [ "${STATIC}" != "yes" ]; then \
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echo "-C target-feature=-crt-static" | tee /tmp/rustflags; \
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fi
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ARG TARGETPLATFORM
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RUN echo "Setting variables for ${TARGETPLATFORM:=linux/amd64}" && \
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case "${TARGETPLATFORM}" in \
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linux/amd64) \
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MUSL="x86_64-linux-musl"; \
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RUSTTARGET="x86_64-unknown-linux-musl"; \
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break;; \
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linux/arm64) \
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MUSL="aarch64-linux-musl"; \
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RUSTTARGET="aarch64-unknown-linux-musl"; \
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break;; \
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linux/arm/v7) \
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MUSL="armv7m-linux-musleabi"; \
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RUSTTARGET="armv7-unknown-linux-musleabi"; \
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break;; \
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linux/arm/v6) \
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MUSL="armv6-linux-musleabi"; \
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RUSTTARGET="arm-unknown-linux-musleabi"; \
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break;; \
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linux/386) \
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MUSL="i686-linux-musl"; \
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RUSTTARGET="i686-unknown-linux-musl"; \
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break;; \
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linux/ppc64le) \
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MUSL="powerpc64le-linux-musl"; \
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RUSTTARGET="powerpc64le-unknown-linux-musl"; \
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break;; \
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linux/s390x) \
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MUSL="s390x-linux-musl"; \
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RUSTTARGET="s390x-unknown-linux-musl"; \
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break;; \
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linux/riscv64) \
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MUSL="riscv64-linux-musl"; \
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RUSTTARGET="riscv64gc-unknown-linux-musl"; \
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break;; \
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*) echo "unsupported platform ${TARGETPLATFORM}"; exit 1;; \
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esac && \
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echo "${MUSL}" | tee /tmp/musl && \
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echo "${RUSTTARGET}" | tee /tmp/rusttarget
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RUN MUSL="$(cat /tmp/musl)" && \
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wget -qO- "https://musl.cc/$MUSL-cross.tgz" | tar -xzC /tmp && \
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rm "/tmp/$MUSL-cross/usr" && \
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cp -fr /tmp/"$MUSL"-cross/* / && \
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rm -rf "/tmp/$MUSL-cross"
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RUN rustup target add "$(cat /tmp/rusttarget)"
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# Copy .cargo/config for cross build configuration
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COPY .cargo ./.cargo
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# Install dependencies
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RUN echo 'fn main() {}' > src/main.rs && \
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RUSTFLAGS="$(cat /tmp/rustflags)" \
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CC="$(cat /tmp/musl)-gcc" \
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cargo build --target "$(cat /tmp/rusttarget)" --release
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RUN rm -r \
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target/*-linux-*/release/deps/prometheus_wireguard_exporter* \
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target/*-linux-*/release/prometheus_wireguard_exporter* \
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src/main.rs
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# Build static binary with musl built-in
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COPY . .
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RUN RUSTFLAGS="$(cat /tmp/rustflags)" \
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CC="$(cat /tmp/musl)-gcc" \
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cargo build --target "$(cat /tmp/rusttarget)" --release && \
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mv target/*-linux-*/release/prometheus_wireguard_exporter /tmp/binary
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RUN description="$(file /tmp/binary)" && \
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echo "$description" && \
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if [ "${STATIC}" = "yes" ] && [ ! -z "$(echo $description | grep musl)" ]; then \
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echo "binary is not statically built!" && exit 1; \
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fi
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FROM alpine:${ALPINE_VERSION}
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EXPOSE 9586/tcp
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WORKDIR /usr/local/bin
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RUN adduser prometheus-wireguard-exporter -s /bin/sh -D -u 1000 1000 && \
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mkdir -p /etc/sudoers.d && \
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echo 'prometheus-wireguard-exporter ALL=(root) NOPASSWD:/usr/bin/wg show * dump' > /etc/sudoers.d/prometheus-wireguard-exporter && \
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chmod 0440 /etc/sudoers.d/prometheus-wireguard-exporter
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RUN apk add --update -q --no-cache wireguard-tools-wg sudo
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USER prometheus-wireguard-exporter
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ENTRYPOINT [ "/usr/local/bin/prometheus_wireguard_exporter" ]
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CMD [ "-a" ]
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COPY --from=build --chown=prometheus-wireguard-exporter /tmp/binary ./prometheus_wireguard_exporter
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