docker-compose-stack.yaml

version: "3.5"

volumes:
  data: {}
  config: {}

services:
  mongomaster:
    image: ${REPO}/mongo
    command: mongod --replSet "mongoRS" ${AUTH} ${MONGOSSL0}
    ports:
      - 27017:27017
    volumes:
      - data:/data/db
      - config:/data/configdb
    networks:
      mongonet:
        aliases:
          - mongo0
    deploy:
      replicas: 1
      placement:
        constraints: [node.labels.mongo.role == master]

  mongoslave1:
    image: ${REPO}/mongo
    command: mongod --replSet "mongoRS" ${AUTH} ${MONGOSSL1}
    volumes:
      - data:/data/db
      - config:/data/configdb
    networks:
      mongonet:
        aliases:
          - mongo1
    deploy:
      replicas: 1
      placement:
        constraints: [node.labels.mongo.role == worker1]

  mongoslave2:
    image: ${REPO}/mongo
    command: mongod --replSet "mongoRS" ${AUTH} ${MONGOSSL2}
    volumes:
      - data:/data/db
      - config:/data/configdb
    networks:
      mongonet:
        aliases:
          - mongo2
    deploy:
      replicas: 1
      placement:
        constraints: [node.labels.mongo.role == worker2]

networks:
  mongonet:
    attachable: true