docker-compose.yml

version: '2.3'

volumes:
  app:
  db:
  bundled:

networks:
  external:
  internal:

services:
  ##
  # Run an instance of MySQL with a database named 'development' for running specs. See config/database.yml
  db:
    image: mysql:5.7
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=12341234
      - MYSQL_DATABASE=development
    volumes:
      - db:/var/lib/mysql
      - ./config/mysql/mysqld.cnf:/etc/mysql/conf.d/custom.cnf
    networks:
      internal:

  ##
  # Run an instance of MySQL with a database named 'test' for running specs. See config/database.yml. Has no volume
  # and doesn't intend on persisting data across sessions.
  db_test:
    image: mysql:5.7
    restart: always
    environment:
      - MYSQL_ROOT_PASSWORD=12341234
      - MYSQL_DATABASE=test
    volumes:
      - ./config/mysql/mysqld.cnf:/etc/mysql/conf.d/custom.cnf
    networks:
      internal:

  ##
  # Basic image for the rails application server, see Dockerfile
  app:
    build: .
    environment:
      - RAILS_ENV=${RAILS_ENV}
      - RAILS_LOG_TO_STDOUT=yesplease
    volumes:
      - .:/data
      - app:/data/tmp/uploads
      - bundled:/usr/local/bundle
    networks:
      internal:

  ##
  # Run the application in the currently set RAILS_ENV, set to development by default in the .env file.
  web:
    extends: app
    # Ideally we will replace this set of commands with an entrypoint script that checks to see if these
    # have been run already have been run and if so it just starts the server without the first three commands
    # taking time to run.
    command: >
      bash -c "rm -f tmp/pids/server.pid
      && bundle exec rails db:migrate
      && bundle exec rails server -p 3000 -b '0.0.0.0' -e ${RAILS_ENV}"
    depends_on:
      db:
        condition: service_started
      db_test:
        condition: service_started
    expose:
      - 3000
    links:
      - db
      - db_test

  ##
  # Load balancer, although not strictly necessary.. would allow the app to work with regular port 80
  lb:
    image: dockercloud/haproxy:1.5.3
    links:
      - web
    environment:
      - DOCKER_TLS_VERIFY
      - DOCKER_HOST
      - DOCKER_CERT_PATH
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      # You must uncomment this line if and only if you are running docker-machine
      # - $DOCKER_CERT_PATH:$DOCKER_CERT_PATH
    networks:
      internal:
      external: