docker-compose.yml

version: '3'
services:
  redis:
    image: "redis:alpine"
    restart: always
    expose:
      - "6379"
    networks:
      - poll-tier
      - back-tier
  db:
    image: postgres:9.4
    restart: always
    ports:
      - 5433:5432
    networks:
      - result-tier
      - back-tier
    volumes:
      - "./schema.sql:/docker-entrypoint-initdb.d/init.sql"
      - db-data:/usr/share/db
    environment:
      - POSTGRES_PASSWORD=password
      - POSTGRES_USER=postgres
  poll:
    build: ./poll
    restart: always
    depends_on:
      - redis
    ports:
      - 5000:80
    networks:
      - poll-tier
    links:
      - redis
    environment:
      - REDIS_HOST=redis
  result:
    build : ./result
    ports:
      - 5001:80
    restart: always
    networks:
      - result-tier
    links:
      - db
    depends_on:
      - db
    environment:
      - DB_HOST=db
  worker:
    build: ./worker
    depends_on:
      - redis
      - db
    restart: always
    environment:
      - DB_HOST=db
      - REDIS_HOST=redis
    networks:
      - back-tier
    ports:
      - 5002:80

volumes:
  db-data:
    driver: local

networks:
  poll-tier:
    driver: bridge
  result-tier:
    driver: bridge
  back-tier:
    driver: bridge