docker-compose.replica.yml

version: "3"

services:
  mongodb:
    image: mongo:4.2.8-bionic
    volumes:
      - ./raw_db:/data/db
      - ./mongo:/etc/mongo
    ports:
      - 27017:27017
    expose:
      - 27017
    restart: unless-stopped
    command: ["--config", "/etc/mongo/mongod.conf"]
  mongodb2:
    image: mongo:4.2.8-bionic
    volumes:
      - ./raw_db_2:/data/db
      - ./mongo:/etc/mongo
    ports:
      - 27018:27017
    expose:
      - 27018
    command: ["--config", "/etc/mongo/mongod.conf"]
    restart: unless-stopped
  # mongodb3:
  #   image: mongo:4.2.8-bionic
  #   volumes:
  #     - ./raw_db_3:/data/db
  #     - ./mongo:/etc/mongo
  #   ports:
  #     - 27019:27017
  #   command: ["--config", "/etc/mongo/mongod.conf"]
  #   restart: unless-stopped

  # # container to initialize replica set
  # mongoinit:
  #   image: mongo:4.2.8-bionic
  #   # this container will exit after executing the command
  #   restart: "no"
  #   depends_on:
  #     - mongodb
  #     - mongodb2
  #     - mongodb3
  #   command: >
  #     sleep 5 &&
  #     mongo --host mongodb:27017 -u ${DB_ADMIN} -p ${DB_ADMIN_PASS} --authenticationDatabase admin --eval
  #     '
  #     config = {
  #     "_id" : "rsMain",
  #     "members" : [
  #       {
  #         "_id" : 0,
  #         "host" : "mongodb:27017"
  #       },
  #       {
  #         "_id" : 1,
  #         "host" : "mongodb2:27017"
  #       },
  #       {
  #         "_id" : 2,
  #         "host" : "mongodb3:27017"
  #       }
  #     ]
  #     };
  #     rs.initiate(config);
  #     '
  #     && echo "Replica set initialized"

networks:
  default:
    name: network_name