Optimizing container builds for caching dependencies, (resulting in faster compile times)
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2 changed files with 22 additions and 6 deletions
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@ -12,11 +12,19 @@ RUN npm run build
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# We use musl to get a truly static binary
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# We use musl to get a truly static binary
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# that runs cleanly without depending on glibc.
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# that runs cleanly without depending on glibc.
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FROM docker.io/rust:latest as builder
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FROM docker.io/rust:latest as builder
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WORKDIR /build
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ADD server /build
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RUN apt update
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RUN apt update
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RUN apt install musl musl-dev musl-tools -y
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RUN apt install musl musl-dev musl-tools -y
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RUN rustup target add x86_64-unknown-linux-musl
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RUN rustup target add x86_64-unknown-linux-musl
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# Some hacks to make podman cache build deps, see:
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# https://whitfin.io/blog/speeding-up-rust-docker-builds/
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RUN cargo new build-container
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WORKDIR /build-container
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COPY server/Cargo.toml server/Cargo.lock ./
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RUN cargo build --target x86_64-unknown-linux-musl --release
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RUN rm src/*.rs
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ADD server /build-container
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RUN cargo build --target x86_64-unknown-linux-musl --release
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RUN cargo build --target x86_64-unknown-linux-musl --release
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# Final stage, copy the server binary and the frontend build
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# Final stage, copy the server binary and the frontend build
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@ -29,7 +37,7 @@ RUN addgroup -S user && adduser -S user -G user
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WORKDIR /runner
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WORKDIR /runner
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# Copy the server binary and the public directory
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# Copy the server binary and the public directory
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COPY --from=builder /build/target/x86_64-unknown-linux-musl/release/server /runner/server
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COPY --from=builder /build-container/target/x86_64-unknown-linux-musl/release/server /runner/server
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# Copy the frontend SPA build into public
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# Copy the frontend SPA build into public
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COPY --from=client /build/dist /runner/public
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COPY --from=client /build/dist /runner/public
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@ -9,11 +9,19 @@
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# We use musl to get a truly static binary
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# We use musl to get a truly static binary
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# that runs cleanly without depending on glibc.
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# that runs cleanly without depending on glibc.
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FROM docker.io/rust:latest as builder
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FROM docker.io/rust:latest as builder
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WORKDIR /build
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ADD server /build
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RUN apt update
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RUN apt update
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RUN apt install musl musl-dev musl-tools -y
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RUN apt install musl musl-dev musl-tools -y
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RUN rustup target add x86_64-unknown-linux-musl
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RUN rustup target add x86_64-unknown-linux-musl
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# Some hacks to make podman cache build deps, see:
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# https://whitfin.io/blog/speeding-up-rust-docker-builds/
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RUN cargo new build-container
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WORKDIR /build-container
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COPY server/Cargo.toml server/Cargo.lock ./
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RUN cargo build --target x86_64-unknown-linux-musl
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RUN rm src/*.rs
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ADD server /build-container
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# Note that '--release' is missing here, so we build in debug mode
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# Note that '--release' is missing here, so we build in debug mode
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RUN cargo build --target x86_64-unknown-linux-musl
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RUN cargo build --target x86_64-unknown-linux-musl
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@ -27,7 +35,7 @@ RUN addgroup -S user && adduser -S user -G user
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WORKDIR /runner
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WORKDIR /runner
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# Copy the server binary and the public directory, note the debug binary
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# Copy the server binary and the public directory, note the debug binary
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COPY --from=builder /build/target/x86_64-unknown-linux-musl/debug/server /runner/server
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COPY --from=builder /build-container/target/x86_64-unknown-linux-musl/debug/server /runner/server
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RUN mkdir /runner/public
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RUN mkdir /runner/public
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RUN echo "Debug build!" > /runner/public/index.html
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RUN echo "Debug build!" > /runner/public/index.html
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