version: '3.1'
volumes:
  postgres-data:
    driver: local
  redis-data:
    driver: local
  gems:
    driver: local

networks:
  front-tier:
    driver: bridge
  back-tier:
    driver: bridge

services:
  rspec:
    image: ruby:2.4
    working_dir: /usr/src/app
    stdin_open: true
    tty: true
    volumes:
      - .:/usr/src/app
      - gems:/usr/local/bundle
    entrypoint: /usr/src/app/dev-entrypoint.sh
    command: bundle exec rspec
    networks:
      - back-tier
      - front-tier
    depends_on:
      - postgres
      - redis
    environment:
      PATH: /usr/src/app/bin:/usr/local/bundle/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
      REDIS_URL: redis://redis:6379
      DATABASE_URL: postgresql://postgres:3x4mpl3@postgres:5433/rails_example_test
      RAILS_ENV: test
      RACK_ENV: test

  redis:
    image: redis:latest
    ports:
      # We'll bind our host's port 6379 to redis's port 6379, so we can use
      # Redis Desktop Manager (or other tools) with it:
      - 6379:6379
    volumes:
      # We'll store the redis data in the 'redis-data' volume we defined:
      - redis-data:/var/lib/redis
    command: redis-server --appendonly yes
    # Make the redis service available only on the "back-tier" network:
    # NOTE: See networks comment on the postgres service above.
    networks: [ "back-tier" ]


  postgres:
    image: postgres:latest
    ports:
      # We'll bind our host's port 5432 to postgres's port 5432, so we can use
            # our database IDEs with it:
      - 5433:5433
    volumes:
      # We'll store the postgres data in the 'postgres-data' volume we defined:
      - postgres-data:/var/lib/postgresql/data
    networks:
      # Make the database service available only on the "back-tier" network:
      # NOTE: Although the service is available only on the "back-tier" network,
      # the host-to-container port binding we've defined for development
      # purposes will allow connection from the development host.
      - back-tier
    environment:
      POSTGRES_PASSWORD: 3x4mpl3