Ryan W
85 lines
2.5 KiB
Docker
85 lines
2.5 KiB
Docker
# syntax=docker/dockerfile:1
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FROM ruby:3.2.1-slim as base
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WORKDIR /rails
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ENV RAILS_ENV=production \
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LANG=C.UTF-8 \
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BUNDLE_JOBS=4 \
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BUNDLE_RETRY=3 \
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BUNDLE_PATH="/usr/local/bundle"
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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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# This example intentionally does not require or install node.js
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RUN apt-get update -qq && apt-get install -yq --no-install-recommends \
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build-essential \
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gnupg2 \
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libpq-dev \
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&& rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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RUN gem update --system && gem install bundler
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# Install application gems
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COPY Gemfile Gemfile.lock ./
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# TODO: consolidate bundle config better, currently split between ENV and `bundle config`
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RUN bundle config frozen true \
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&& bundle config jobs 4 \
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&& bundle config deployment true \
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&& bundle config without 'development test' \
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&& bundle install \
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&& bundle exec bootsnap precompile --gemfile
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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 app/ lib/
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# Precompile assets
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# SECRET_KEY_BASE or RAILS_MASTER_KEY is required in production, but we don't
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# want real secrets in the image or image history. The real secret is passed in
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# at run time
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ARG SECRET_KEY_BASE=fakekeyforassets
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RUN ./bin/rails assets:precompile
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# TODO: This will work in Rails 7.1
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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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# Install packages needed for deployment
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# RUN apt-get update -qq && apt-get install -yq --no-install-recommends \
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# && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
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# Copy built artifacts: gems, application
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COPY --from=build /usr/local/bundle /usr/local/bundle
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COPY --from=build /rails /rails
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# Run and own only the runtime files as a non-root user for security
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RUN useradd rails --home /rails --shell /bin/bash && \
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chown -R rails:rails db log storage tmp
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USER rails:rails
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# TODO: migrate/consolidate to have all database migrations in here
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# Entrypoint prepares the database.
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# ENTRYPOINT ["/rails/bin/docker-entrypoint"]
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# Run database migrations when deploying to Render. It is not great, maybe there's a better way?
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# https://community.render.com/t/release-command-for-db-migrations/247/6
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ARG RENDER
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ARG DATABASE_URL
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RUN if [ -z "$RENDER" ]; then echo "var is unset"; else bin/rails db:migrate; fi
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# Start Server
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EXPOSE 3000
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CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]
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