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README.md

Erlang on Alpine Linux

This Dockerfile provides a full installation of Erlang on Alpine, intended for running Erlang 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-erlang erl
Erlang/OTP 20 [erts-9.0] [source] [64-bit] [smp:4:4] [async-threads:10] [hipe] [kernel-poll:false]

Eshell V9.0  (abort with ^G)
1>
BREAK: (a)bort (c)ontinue (p)roc info (i)nfo (l)oaded
       (v)ersion (k)ill (D)b-tables (d)istribution
a

Extending for your own application:

FROM bitwalker/alpine-erlang:20.1

# Set exposed ports
EXPOSE 5000
ENV PORT=5000

ENV MIX_ENV=prod

ADD yourapp.tar.gz ./

USER default

ENTRYPOINT ["./bin/yourapp"]
CMD ["foreground"]

License

MIT

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An alpine image with Erlang installed, intended for releases

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