version: "3.7"


services:
   mongo-1:
     image: mongo:4
     command: ["mongod","--replSet","test-rs"]
     networks:
       - mongo-net
     ports:
       - "27020:27017"
       - "28020:28017"
     volumes:
      # where mongo stores data
       - mongo-data-1:/data/db
       #where mongo stores its config files
       - mongo-config-1:/data/configdb
     deploy:
       mode: replicated
       replicas: 1
       # restart service everytime it fails
       restart_policy:
         condition: on-failure
       placement:
         constraints:
           - node.labels.mongo.replica==1

   mongo-2:
     image: mongo:4
     command: ["mongod","--replSet","test-rs"]
     networks:
       - mongo-net
     ports:
       - "27021:27017"
       - "28021:28017"
     volumes:
       - mongo-data-2:/data/db
       - mongo-config-2:/data/configdb
     deploy:
       mode: replicated
       replicas: 1
       restart_policy:
         condition: on-failure
       placement:
         constraints:
           - node.labels.mongo.replica==2


   mongo-3:
     image: mongo:4
     command: ["mongod","--replSet","test-rs"]
     networks:
       - mongo-net
     ports:
       - "27022:27017"
       - "28022:28017"
     volumes:
      # where mongo stores data
       - mongo-data-3:/data/db
       #where mongo stores its config files
       - mongo-config-3:/data/configdb
     deploy:
       mode: replicated
       replicas: 1
       # restart service everytime it fails
       restart_policy:
         condition: on-failure
       placement:
         constraints:
           - node.labels.mongo.replica==3
     
   web:
     image: nginx
     depends_on:
       - mongodb
     networks:
       - mongo-net
     ports:
        - 80:80
        - 443:443     
     volumes: 
        - /home/user/mongodb/reverse_proxy/nginx.conf:/etc/nginx/stream/conf.d/default.conf

networks:
  mongo-net:
    external: true 
volumes:
  mongo-data-1:
  mongo-config-1:
  mongo-data-2:
  mongo-config-2:
  mongo-data-3:
  mongo-config-3: