This Dockerfile provides everything you need to run your Phoenix application in Docker out of the box.
It is based on my alpine-erlang image, and installs Elixir (1.3.1), Node.js (6.2.x), Hex and Rebar. It can handle compiling
your Node and Elixir dependencies as part of it's build.
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-phoenix iex
Erlang/OTP 18 [erts-7.3] [source] [64-bit] [smp:2:2] [async-threads:10] [kernel-poll:false]
Interactive Elixir (1.2.4) - press Ctrl+C to exit (type h() ENTER for help)
iex(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-elixir-phoenix:latest
# Set exposed ports
EXPOSE 5000
ENV PORT=5000 MIX_ENV=prod
# Cache npm deps
ADD package.json package.json
RUN npm install
# Same with elixir deps
ADD mix.exs mix.lock ./
RUN mix do deps.get, deps.compile
ADD . .
# Run frontend build, compile, and digest assets
RUN brunch build --production && \
mix do compile, phoenix.digest
USER default
CMD ["mix", "phoenix.server"]It is recommended when using this that you have the following in .dockerignore when running docker build:
_build
deps
node_modules
test
This will keep the payload smaller and will also avoid any issues when compiling dependencies.
MIT