docker-compose.yaml

version: "3"

services:
  lb:
    image: nginx
    volumes:
      - ./nginx.conf:/etc/nginx/conf.d/default.conf
    ports:
      - 80:80
    networks:
      - snoozenw
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.role == manager
  snooze1:
    image: snoozeweb/snooze
    environment:
      - DATABASE_URL=mongodb://mongo1:27017,mongo2:27017,mongo3:27017/snooze?replicaSet=rs0
      - SNOOZE_CLUSTER=snooze1:5200,snooze2:5200,snooze3:5200
    ports:
      - "5201:5200"
    networks:
      - snoozenw
    depends_on:
      - mongo1
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == HOST1
  snooze2:
    image: snoozeweb/snooze
    environment:
      - DATABASE_URL=mongodb://mongo1:27017,mongo2:27017,mongo3:27017/snooze?replicaSet=rs0
      - SNOOZE_CLUSTER=snooze1:5200,snooze2:5200,snooze3:5200
    ports:
      - "5202:5200"
    networks:
      - snoozenw
    depends_on:
      - mongo1
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == HOST2
  snooze3:
    image: snoozeweb/snooze
    environment:
      - DATABASE_URL=mongodb://mongo1:27017,mongo2:27017,mongo3:27017/snooze?replicaSet=rs0
      - SNOOZE_CLUSTER=snooze1:5200,snooze2:5200,snooze3:5200
    ports:
      - "5203:5200"
    networks:
      - snoozenw
    depends_on:
      - mongo1
    deploy:
      replicas: 1
      placement:
        constraints:
           - node.hostname == HOST3
  mongo1:
    image: mongo
    networks:
      - snoozenw
    command: ["--replSet", "rs0"]
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == HOST1
  mongo2:
    image: mongo
    networks:
      - snoozenw
    command: ["--replSet", "rs0"]
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == HOST2
  mongo3:
    image: mongo
    networks:
      - snoozenw
    command: ["--replSet", "rs0"]
    deploy:
      replicas: 1
      placement:
        constraints:
          - node.hostname == HOST3

networks:
  snoozenw: