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Elixir on Alpine Linux

This Dockerfile provides a full installation of Erlang and Elixir on Alpine, intended for running releases, so it has no build tools installed. The Erlang installation is provided so one can avoid cross-compiling releases. The caveat of course is if one has NIFs which require a native compilation toolchain, but that is left as an exercise for the reader.

Usage

NOTE: This image sets up a default user, with home set to /opt/app and owned by that user. The working directory is also set to $HOME. It is highly recommended that you add a USER default instruction to the end of your Dockerfile so that your app runs in a non-elevated context.

To boot straight to a prompt in the image:

$ docker run --rm -it --user=root bitwalker/alpine-elixir iex
Erlang/OTP 19 [erts-8.0.1] [source] [64-bit] [async-threads:10] [hipe] [kernel-poll:false]

Interactive Elixir (1.5.2) - press Ctrl+C to exit (type h() ENTER for help)
iex(1)>

Extending for your own application:

FROM bitwalker/alpine-elixir:1.5.2

# Set exposed ports
EXPOSE 5000
ENV PORT=5000

ENV MIX_ENV=prod

ADD yourapp.tar.gz ./
RUN tar -xzvf yourapp.tar.gz

USER default

CMD ./bin/yourapp foreground

License

MIT

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A Dockerfile based on my alpine-erlang image for Elixir applications

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