docker-compose-prod.yml

version: '3.4'

services:
  db:
    environment:
      - POSTGRES_PASSWORD=my-db-password
    image: postgres:11-alpine
    hostname: db.my-site.com
    ports:
      - 5432
    restart: always
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres"]
      interval: 30s
      timeout: 30s
      retries: 3
    volumes:
      - postgres_data:/var/lib/postgresql/data

  redis:
    image: redis:5.0-alpine
    hostname: redis.my-site.com
    restart: always
    volumes:
      - terraform_rails_redis_data:/data

  app: &app_base
    image: terraform-rails
    hostname: app.my-site.com
    build:
      context: .
      dockerfile: ./devops/docker/app/Dockerfile
      args:
        - EXECJS_RUNTIME=Disabled
        - RAILS_ENV=production
        - NODE_ENV=production
        - FOLDERS_TO_REMOVE=spec node_modules app/assets vendor/assets lib/assets tmp/cache
        - BUNDLE_WITHOUT=development:test
        - SECRET_KEY_BASE=fake-secret-for-assets-precompilation
    environment: # this will override .env
      - POSTGRES_HOST=db
      - POSTGRES_PASSWORD=my-db-password
      - POSTGRES_USER=postgres
      - RAILS_ENV=production
      - NODE_ENV=production
      - RAILS_MAX_THREADS=5
      - REDIS_SIDEKIQ_URL=redis://redis:6379/0
    links:
      - db
      - redis
    volumes:
      - ./config/master.key:/app/config/master.key
      - type: tmpfs
        target: /app/tmp/pids
    restart: always
    healthcheck:
      test: ["CMD-SHELL", "nc -z 127.0.0.1 3000 || exit 1"]
      interval: 5m
      start_period: 1m

  web:
    hostname: my-site.com
    build:
      context: .
      dockerfile: ./devops/docker/web/Dockerfile
    depends_on:
      - app
    ports:
      - 8080:80
    restart: always
    healthcheck:
      test: ["CMD-SHELL", "nc -z 127.0.0.1 8080 || exit 1"]
      interval: 5m
      start_period: 1m

  worker:
    <<: *app_base
    command: bundle exec sidekiq
    ports: []
    depends_on:
      - app
      - redis
    restart: always
    healthcheck:
      test: "ps ax | grep -v grep | grep sidekiq"
      interval: 1m
      start_period: 1m

volumes:
  postgres_data:
    external: true
  terraform_rails_redis_data:
    external: true