quoter/Dockerfile

# Build stage with memory optimization
FROM rust:slim-bookworm AS build

# Create larger temporary swap file for extreme memory optimization
RUN dd if=/dev/zero of=/tmp/swapfile bs=1M count=4096 && \
    chmod 600 /tmp/swapfile && \
    mkswap /tmp/swapfile && \
    swapon /tmp/swapfile || true && \
    # Set swappiness to use swap more aggressively
    echo 80 > /proc/sys/vm/swappiness || true

# Install build dependencies
RUN apt-get update && \
    apt-get install -y \
    git \
    pkg-config \
    make \
    g++ \
    libssl-dev \
    libtiff-dev \
    clang \
    libclang-dev \
    pkg-config \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Add target
RUN rustup target add x86_64-unknown-linux-gnu

# Create a new empty shell project
RUN USER=root cargo new --bin quoter

WORKDIR /quoter

# Copy manifests and cargo config
COPY ./Cargo.lock ./Cargo.lock
COPY ./Cargo.toml ./Cargo.toml
COPY ./.cargo ./.cargo

# Extreme memory optimization environment variables
ENV CARGO_NET_GIT_FETCH_WITH_CLI=true
ENV CARGO_NET_RETRY=3
ENV CARGO_NET_TIMEOUT=60
ENV CARGO_HTTP_TIMEOUT=60
ENV CARGO_HTTP_LOW_SPEED_LIMIT=10
ENV RUSTC_FORCE_INCREMENTAL=0
# Additional memory optimization for Redis connection pool compilation
ENV CARGO_BUILD_JOBS=1
ENV RUSTFLAGS="-C opt-level=s -C target-cpu=generic"
# Build dependencies only with extreme memory conservation
RUN cargo build --release && \
    # Force cleanup of intermediate files to free memory
    cargo clean -p quoter && \
    # Keep only the dependency artifacts (suppressing error if dir doesn't exist)
    find target/release/deps -name "quoter*" -delete 2>/dev/null || true

# Remove the default source file created by cargo new (but keep lib.rs)
RUN rm src/main.rs || true

# Copy source code
COPY ./src ./src

# Build for release with aggressive memory cleanup
RUN cargo build --release && \
    # Verify the binary was created
    ls -la target/release/quoter && \
    # Immediately strip the binary to save space
    strip target/release/quoter || true && \
    # Clean up swap file
    swapoff /tmp/swapfile || true && \
    rm -f /tmp/swapfile

# Final stage
FROM debian:bookworm-slim

# Install runtime dependencies and CA certificates
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    ca-certificates \
    libssl3 \
    libtiff6 \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/* \
    && update-ca-certificates

# Set environment variables
ENV RUST_BACKTRACE=1
ENV RUST_LOG=warn

# Copy the build artifact from the build stage
COPY --from=build /quoter/target/release/quoter .

EXPOSE 8080

# Create healthcheck
HEALTHCHECK --interval=30s --timeout=3s \
  CMD curl -f http://localhost:8080/ || exit 1

# Set the startup command
CMD ["./quoter"]