Dockerize Elixir app

config_dev.exs

use Mix.Config

config :redis_poolex,
  reconnect: :no_reconnect,
  max_queue: :infinity,
  pool_size: 10,
  pool_max_overflow: 1,
  connection_string: "redis://redis:6379/"
  
config :requesters, Requesters.Workers.RabbitConfig,
  hostname: "amqp://rabbitmq:5672",
  pool_size: 1,
  max_overflow: 1,
  reconnect_timeout: 5000

config :requesters, Requesters.Repo,
  adapter: Ecto.Adapters.Postgres,
  url: "postgres://postgres:mysecretpassword@db:5432/postgres"

config :tirexs, :uri, "http://elasticsearch:9200"

docker-compose.yml

version: "2"

services:
  elasticsearch:
    image: elasticsearch:latest
    container_name: elasticsearch
    ports: ["9200"]
    networks:
      - back-tier

  rabbitmq:
    image: rabbitmq:latest
    container_name: rabbitmq
    ports: ["5672"]
    networks:
      - back-tier

  redis:
    image: redis:alpine
    container_name: redis
    ports: ["6379"]
    networks:
      - back-tier

  db:
    image: postgres:9.4
    container_name: db
    volumes:
      - "db-data:/var/lib/postgresql/data"
    networks:
      - back-tier

volumes:
  db-data:

networks:
  back-tier:

Dockerfile

FROM trenpixster/elixir

WORKDIR /app

ADD http://s3.amazonaws.com/s3.hex.pm/installs/1.1.0/hex-0.14.0.ez /tmp/
RUN mix archive.install --force /tmp/hex-0.14.0.ez

Makefile

NAME = musicfeed-workers

build:
	docker build -t $(NAME) .
	docker run --rm -t -i \
		--network=musicfeedworkers_back-tier \
		-v `pwd`:/app \
		--dns 8.8.8.8 \
		-w /app \
		$(NAME) \
		/bin/bash -c "mix deps.get"
.PHONY: build

test:
	docker run --rm -t -i \
		--network=musicfeedworkers_back-tier \
		-v `pwd`:/app \
		--dns 8.8.8.8 \
		-w /app \
		$(NAME) \
		/bin/bash -c "mix test"
.PHONY: test

console:
	docker run --rm -t -i \
		--network=musicfeedworkers_back-tier \
		-v `pwd`:/app \
		--dns 8.8.8.8 \
		-w /app \
		$(NAME) \
		/bin/bash
.PHONY: console