Dockerizing Ruby on Rails

docker-compose.yml

version: '2'
services:
  app:
    build: .
    image: localhost:5000/nolan
    command: bin/rails server --port 3000 --binding 0.0.0.0
    environment:
      - BUNDLE_PATH=/root/bundle
      - DATABASE_URL=postgres://postgres:@db/fblb
      - AWS_KEY=AKIAEROO7DAUAFGW2ECQ
      - AWS_SECRET=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
      - AWS_REGION=ap-southeast-1
      - SPRING_SOCKET=/home/docker/apps/nolan/current/tmp/spring
    volumes:
      - .:/home/docker/apps/nolan/current
      - bundle_volume:/root/bundle
    volumes_from:
      - bundle
    ports:
      - "3000:3000"
    depends_on:
      - db
      - redis
    stdin_open: true
    tty: true

  db:
    # image: localhost:5000/postgres:9.4
    image: postgres:9.4
    environment:
      - PGDATA=/var/lib/postgresql/data/pgdata
    volumes:
      - ./tmp/db:/var/lib/postgresql/data/pgdata
    ports:
      - "5432"

  redis:
    # image: localhost:5000/redis
    image: redis
    ports:
      - "6379"
    
volumes:
  bundle_volume:
    external:
      name: bundle_volume

docker-setup.sh

docker volume create --name=bundle_volume
docker-compose build
docker-compose run --rm app bundle install
docker-compose run --rm app bundle exec rake db:setup
docker-compose up -d
docker-compose ps

Dockerfile

FROM ruby:2.3
MAINTAINER backend@nuvoex.com
# https://blog.codeship.com/running-rails-development-environment-docker/

# Install apt based dependencies required to run Rails as 
# well as RubyGems. As the Ruby image itself is based on a 
# Debian image, we use apt-get to install those.
RUN apt-get update && apt-get install -y build-essential

# For postgres
RUN apt-get install -y libpq-dev

# For nokogiri
RUN apt-get install -y libxml2-dev libxslt1-dev

# For a JS runtime
RUN apt-get install -y nodejs

# Configure the main working directory. This is the base 
# directory used in any further RUN, COPY, and ENTRYPOINT 
# commands.
ENV NOLAN_HOME /home/docker/apps/nolan/current
RUN mkdir -p $NOLAN_HOME
WORKDIR $NOLAN_HOME

ENV BUNDLE_PATH /root/bundle

# Copy the main application.
# ADD . $NOLAN_HOME