docker-compose.yml

version: '2.1'

volumes:
  # We'll define a volume that will store the data from the postgres databases:
  postgres-data:
    driver: local
  # The rabbitmq data store volume
  redis-data:
    driver: local
  # We'll also define a volume that will store gems installed manually after the initial app
  # development image build process:
  app-gems:
    driver: local

services:
  # Our PostgreSQL service:
  postgres:
    image: postgres:9.6.1
    ports:
      # We'll bind our host's port 5432 to postgres's port 5432, so we can use
      # our database IDEs with it:
      - 5432:5432
    volumes:
      # Mount the DB dumps folder into the container, to be able to create & access database dumps:
      - ./db/dumps:/db/dumps
      # Mount out tmp folder, we might want to have access to something there during development:
      - ./tmp:/tmp
      # Mount our 'restoredb' script:
      - ./bin/restoredb:/bin/restoredb:ro
      # Mount our 'dumpdb' script:
      - ./bin/dumpdb:/bin/dumpdb:ro
      # We'll mount the 'postgres-data' volume into the location Postgres stores it's data:
      - postgres-data:/var/lib/postgresql/data
    environment:
      POSTGRES_PASSWORD: 3x4mpl3

  # Our Redis service:
  redis:
    image: redis:3.2.4-alpine
    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 mount the 'redis-data' volume into the location redis stores it's data:
      - redis-data:/var/lib/redis
    command: redis-server --appendonly yes

  # Application: -----------------------------------------------------------------
  # We'll also use this configuration (&app_base) for the web and test containers:
  jobs: &app_base
    build:
      context: .
      dockerfile: dev.Dockerfile
    image: vovimayhem/docker-compose-rails-dev-example:development
    entrypoint: /usr/src/app/development-entrypoint

    # The command this container will run - in this case, this container will run our sidekiq
    # process:
    command: sidekiq -c 25 -q default

    volumes:
      # Mount our app code directory (".") into our app containers at the
      # "/usr/src/app" folder:
      - .:/usr/src/app

      # Mount the 'gems' volume on the folder that stores bundled gems:
      - app-gems:/usr/local/bundle

    # Keep the stdin open, so we can attach to our app container's process and do things such as
    # byebug, etc:
    stdin_open: true

    # Enable sending signals (CTRL+C, CTRL+P + CTRL+Q) into the container:
    tty: true

    # Link to our postgres and redis containers, so they can be visible from our
    # app containers:
    links:
      # We'll include a link to the 'db' (postgres) container, making it visible from the container
      # using the 'postgres.local' hostname (which is not necessary, but I'm doing it here to
      # illustrate that you can play with this):
      - postgres:db.local

      # We'll include a link to the 'keyval' (redis) container, making it
      # visible from the container using the 'keyval.local' hostname:
      - redis:keyval.local

    environment: &app_environment
      # The postgres database URL:
      DATABASE_URL: postgres://postgres:3x4mpl3@db.local:5432/example_development

      # The redis URL:
      REDIS_URL: redis://keyval.local:6379

      # Sidekiq configuration:
      SIDEKIQ_CONCURRENCY: 5
      SIDEKIQ_TIMEOUT: 10

      # Run the app in the 'development' environment:
      RACK_ENV: development
      RAILS_ENV: development

  # This container will run the rails web server:
  web:
    # We'll copy from &app_base, and override:
    <<: *app_base
    command: rails server -p 3000 -b 0.0.0.0
    ports:
      - "3000:3000" # Bind our host's port 3000 to the app port 3000:

  # App Guard: Keeps running tests on a separate process:
  test:
    # We'll copy from &app_base, and override:
    <<: *app_base
    command: guard start --no-bundler-warning --no-interactions
    environment:
      <<: *app_environment
      # PostgreSQL Test Database:
      DATABASE_URL: postgres://postgres:3x4mpl3@db.local:5432/example_test
      # Run the app in the 'test' environment, instead of the default 'developent'
      RACK_ENV: test
      RAILS_ENV: test