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95 lines
2.7 KiB
95 lines
2.7 KiB
# Find eligible builder and runner images on Docker Hub. We use Ubuntu/Debian |
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# instead of Alpine to avoid DNS resolution issues in production. |
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# |
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# https://hub.docker.com/r/hexpm/elixir/tags?name=ubuntu |
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# https://hub.docker.com/_/ubuntu/tags |
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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/tags?name=trixie-20260202-slim - for the release image |
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# - https://pkgs.org/ - resource for finding needed packages |
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# - Ex: docker.io/hexpm/elixir:1.17.3-erlang-27.3.4.7-debian-trixie-20260202-slim |
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# |
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ARG ELIXIR_VERSION=1.17.3 |
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ARG OTP_VERSION=27.3.4.7 |
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ARG DEBIAN_VERSION=trixie-20260202-slim |
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ARG BUILDER_IMAGE="docker.io/hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}" |
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ARG RUNNER_IMAGE="docker.io/debian:${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 \ |
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&& apt-get install -y --no-install-recommends build-essential git cmake \ |
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&& rm -rf /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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# TODO: Vary this by deployed environment via passed-in env var |
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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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# 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 ${RUNNER_IMAGE} AS final |
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RUN apt-get update \ |
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&& apt-get install -y --no-install-recommends libstdc++6 openssl libncurses6 locales ca-certificates \ |
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&& rm -rf /var/lib/apt/lists/* |
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# Set the locale |
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RUN sed -i '/en_US.UTF-8/s/^# //g' /etc/locale.gen \ |
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&& locale-gen |
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ENV LANG=en_US.UTF-8 |
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ENV LANGUAGE=en_US:en |
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ENV LC_ALL=en_US.UTF-8 |
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WORKDIR "/app" |
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RUN chown nobody /app |
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# set runner ENV |
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ENV MIX_ENV="prod" |
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# Only copy the final release from the build stage |
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COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/gc_index_relay ./ |
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USER nobody |
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# If using an environment that doesn't automatically reap zombie processes, it is |
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# advised to add an init process such as tini via `apt-get install` |
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# above and adding an entrypoint. See https://github.com/krallin/tini for details |
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# ENTRYPOINT ["/tini", "--"] |
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CMD ["/app/bin/server"]
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