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0988e2d9d6
* feat(docker): add jemalloc to reduce memory fragmentation Install libjemalloc2 in the base image and preload it via LD_PRELOAD in docker-entrypoint when available. Reduces RSS growth from glibc's default allocator fragmentation under Rails workloads. * feat(docker): add DISABLE_JEMALLOC env var + preserve existing LD_PRELOAD * feat(docker): add jemalloc status logging to entrypoint * refactor(docker): simplify jemalloc logging to warn-only when disabled/missing
64 lines
2.1 KiB
Docker
64 lines
2.1 KiB
Docker
# syntax = docker/dockerfile:1
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# Make sure RUBY_VERSION matches the Ruby version in .ruby-version and Gemfile
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ARG RUBY_VERSION=3.4.7
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FROM registry.docker.com/library/ruby:$RUBY_VERSION-slim AS base
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# Rails app lives here
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WORKDIR /rails
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# Install base packages
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RUN apt-get update -qq \
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&& apt-get install --no-install-recommends -y curl libvips postgresql-client libyaml-0-2 procps libjemalloc2 \
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&& rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# Set production environment
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ARG BUILD_COMMIT_SHA
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ENV RAILS_ENV="production" \
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BUNDLE_DEPLOYMENT="1" \
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BUNDLE_PATH="/usr/local/bundle" \
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BUNDLE_WITHOUT="development" \
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BUILD_COMMIT_SHA=${BUILD_COMMIT_SHA}
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# Throw-away build stage to reduce size of final image
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FROM base AS build
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# Install packages needed to build gems
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RUN apt-get update -qq \
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&& apt-get install --no-install-recommends -y build-essential libpq-dev git pkg-config libyaml-dev \
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&& rm -rf /var/lib/apt/lists /var/cache/apt/archives
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# Install application gems
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COPY .ruby-version Gemfile Gemfile.lock ./
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RUN bundle install \
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&& rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git \
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&& bundle exec bootsnap precompile --gemfile -j 0
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# Copy application code
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COPY . .
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# Precompile bootsnap code for faster boot times
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RUN bundle exec bootsnap precompile -j 0 app/ lib/
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# Precompiling assets for production without requiring secret RAILS_MASTER_KEY
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RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile
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# Final stage for app image
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FROM base
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# Run and own only the runtime files as a non-root user for security
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RUN groupadd --system --gid 1000 rails && \
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useradd rails --uid 1000 --gid 1000 --create-home --shell /bin/bash
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USER 1000:1000
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# Copy built artifacts: gems, application
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COPY --chown=rails:rails --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
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COPY --chown=rails:rails --from=build /rails /rails
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# Entrypoint prepares the database.
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ENTRYPOINT ["/rails/bin/docker-entrypoint"]
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# Start the server by default, this can be overwritten at runtime
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EXPOSE 3000
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CMD ["./bin/rails", "server"]
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