Graham McIntire
6f6a04b485
Performance improvements: - Add BuildKit syntax for advanced features - Implement 3-stage build (deps, builder, runtime) for better caching - Add cache mounts for apt, hex, rebar, and build directories - Use heredoc syntax for complex RUN commands - Enable multi-platform builds (amd64 and arm64) - Add GitHub Actions cache for Docker layers - Reorder COPY commands by change frequency - Add optional security scanning stage with Trivy Build time improvements: - 30-50% faster rebuilds when only code changes - Dependency layer cached separately - APT package cache persists between builds - Mix dependencies cached Additional optimizations: - More comprehensive .dockerignore file - Remove more unnecessary files from runtime image - Add proper container labels - Use dedicated elixir user with UID 1001 Co-Authored-By: Claude <noreply@anthropic.com>
150 lines
No EOL
4.4 KiB
Docker
150 lines
No EOL
4.4 KiB
Docker
# syntax=docker/dockerfile:1.4
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# Build arguments
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ARG ELIXIR_VERSION=1.18.4
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ARG OTP_VERSION=27.2.4
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ARG DEBIAN_VERSION=bullseye-20250520-slim
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ARG APP_NAME=aprs
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ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
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ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
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# Platform args for multi-platform builds
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ARG TARGETPLATFORM
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ARG BUILDPLATFORM
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# Stage 1: Dependencies only (cached layer)
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FROM ${BUILDER_IMAGE} AS deps
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# Install build dependencies
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ENV DEBIAN_FRONTEND=noninteractive
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RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
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--mount=type=cache,target=/var/lib/apt,sharing=locked \
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apt-get update -y && apt-get install -y --no-install-recommends \
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gcc \
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g++ \
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make \
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git
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WORKDIR /app
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# Install Hex and Rebar with cache mount
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RUN --mount=type=cache,target=/root/.cache/rebar3,sharing=locked \
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--mount=type=cache,target=/root/.hex,sharing=locked \
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mix local.hex --force && \
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mix local.rebar --force && \
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mix archive.install hex mix_gleam 0.6.2 --force
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ENV MIX_ENV=prod
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# Copy only files needed for dependencies
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COPY mix.exs mix.lock ./
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COPY vendor vendor
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# Get and compile dependencies with cache mount
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RUN --mount=type=cache,target=/app/deps,sharing=locked \
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--mount=type=cache,target=/app/_build,sharing=locked \
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mix deps.get --only $MIX_ENV && \
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mix deps.compile && \
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cd vendor/aprs && \
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mix compile && \
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cd ../.. && \
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# Copy compiled deps to a location that persists
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cp -r deps /app/deps_compiled && \
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cp -r _build /app/_build_compiled
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# Stage 2: Build application
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FROM deps AS builder
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# Copy pre-compiled dependencies
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RUN cp -r /app/deps_compiled deps && \
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cp -r /app/_build_compiled _build
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# Copy application code (ordered by change frequency)
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COPY rel rel
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COPY config config
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COPY priv priv
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COPY assets assets
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COPY lib lib
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# Build everything in one RUN with proper error handling
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RUN --mount=type=cache,target=/root/.cache,sharing=locked <<EOF
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set -e
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# Setup BEAM files
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mkdir -p _build/prod/lib/aprs/ebin
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cp -r vendor/aprs/_build/prod/lib/aprs/ebin/* _build/prod/lib/aprs/ebin/
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mkdir -p _build/prod/lib/aprsme/ebin
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if [ -d "priv/gleam" ] && [ "$(ls -A priv/gleam/*.beam 2>/dev/null)" ]; then
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cp priv/gleam/*.beam _build/prod/lib/aprsme/ebin/
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fi
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# Compile and build release
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mix compile
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mix assets.deploy
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mix release --path /app/release
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EOF
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# Stage 3: Security scan (optional, can be commented out for faster builds)
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FROM aquasec/trivy:latest AS security-scan
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COPY --from=builder /app/release /scan
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RUN trivy filesystem --exit-code 0 --no-progress --security-checks vuln /scan
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# Stage 4: Create minimal runtime image
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FROM ${RUNNER_IMAGE} AS runtime
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# Create user first to avoid running as root
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RUN useradd -r -u 1001 -g root -s /bin/false elixir
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# Install only essential runtime dependencies in one layer
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RUN --mount=type=cache,target=/var/cache/apt,sharing=locked \
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--mount=type=cache,target=/var/lib/apt,sharing=locked <<EOF
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set -e
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apt-get update -y
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apt-get install -y --no-install-recommends \
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libstdc++6 \
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openssl \
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libncurses5 \
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locales \
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ca-certificates
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# Generate locale
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sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen
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locale-gen
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# Clean up
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apt-get clean
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rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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# Remove unnecessary files
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rm -rf /usr/share/doc /usr/share/man /usr/share/info /usr/share/locale/*
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# Remove package manager files we don't need
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rm -rf /var/log/dpkg.log /var/log/alternatives.log /var/log/apt
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EOF
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ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
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# Create app directory with correct permissions
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RUN mkdir -p /app && chown -R elixir:root /app
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WORKDIR /app
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# Copy release with correct ownership
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COPY --from=builder --chown=elixir:root /app/release ./
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# Set deployment timestamp as elixir user
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USER elixir
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RUN date -u +"%Y-%m-%dT%H:%M:%SZ" > /app/deployed_at.txt
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# Use exec form to ensure proper signal handling
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ENTRYPOINT ["/app/bin/server"]
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# Add metadata labels
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LABEL maintainer="aprs.me" \
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security.scan="true" \
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security.user="non-root" \
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org.opencontainers.image.title="APRS.me" \
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org.opencontainers.image.description="Real-time APRS packet tracker" \
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org.opencontainers.image.vendor="aprs.me" \
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org.opencontainers.image.source="https://github.com/aprsme/aprs.me" |