92 lines
2.5 KiB
Docker
92 lines
2.5 KiB
Docker
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# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian instead of
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# Alpine to avoid DNS resolution issues in production.
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#
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# https://hub.docker.com/r/hexpm/elixir/tags?page=1&name=ubuntu
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# https://hub.docker.com/_/ubuntu?tab=tags
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#
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#
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# This file is based on these images:
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#
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# - https://hub.docker.com/r/hexpm/elixir/tags - for the build image
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# - https://hub.docker.com/_/debian?tab=tags&page=1&name=<%= debian %>-<%= debian_vsn %>-slim - for the release image
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# - https://pkgs.org/ - resource for finding needed packages
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# - Ex: hexpm/elixir:<%= elixir_vsn %>-erlang-<%= otp_vsn %>-debian-<%= debian %>-<%= debian_vsn %>-slim
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#
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ARG ELIXIR_VERSION=<%= elixir_vsn %>
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ARG OTP_VERSION=<%= otp_vsn %>
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ARG DEBIAN_VERSION=<%= debian %>-<%= debian_vsn %>-slim
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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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FROM ${BUILDER_IMAGE} as builder
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# install build dependencies
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RUN apt-get update -y && apt-get install -y build-essential git \
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&& apt-get clean && rm -f /var/lib/apt/lists/*_*
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# prepare build dir
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WORKDIR /app
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# install hex + rebar
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RUN mix local.hex --force && \
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mix local.rebar --force
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# set build ENV
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ENV MIX_ENV="prod"
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# install mix dependencies
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COPY mix.exs mix.lock ./
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RUN mix deps.get --only $MIX_ENV
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RUN mkdir config
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# copy compile-time config files before we compile dependencies
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# to ensure any relevant config change will trigger the dependencies
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# to be re-compiled.
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COPY config/config.exs config/${MIX_ENV}.exs config/
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RUN mix deps.compile
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COPY priv priv
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COPY lib lib
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<%= if assets_dir_exists? do %>
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COPY assets assets
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# compile assets
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RUN mix assets.deploy
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<% end %>
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# Compile the release
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RUN mix compile
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# Changes to config/runtime.exs don't require recompiling the code
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COPY config/runtime.exs config/
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COPY rel rel
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RUN mix release
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# start a new build stage so that the final image will only contain
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# the compiled release and other runtime necessities
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FROM ${RUNNER_IMAGE}
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RUN apt-get update -y && apt-get install -y libstdc++6 openssl libncurses5 locales \
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&& apt-get clean && rm -f /var/lib/apt/lists/*_*
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# Set the locale
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RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen && locale-gen
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ENV LANG en_US.UTF-8
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ENV LANGUAGE en_US:en
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ENV LC_ALL en_US.UTF-8
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WORKDIR "/app"
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RUN chown nobody /app
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# set runner ENV
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ENV MIX_ENV="prod"
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# Only copy the final release from the build stage
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COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/<%= otp_app %> ./
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USER nobody
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CMD ["/app/bin/server"]
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