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.
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