docker-compose.yml

volumes:
  key_auth_vol:
  mongo_vol_1:
  mongo_vol_2:
  mongo_vol_3:

networks:
  mongo_net_rs1:

services:
  # see documentation for keyfiles https://docs.mongodb.com/manual/core/security-internal-authentication/#std-label-internal-auth-keyfile
  # creating a key file to share between or mongo nodes in the replicaset
  gen_auth_key:
    container_name: gen_auth_key
    image: depop/openssl-bats
    volumes:
      - key_auth_vol:/mongo-conf
    command: 'bash -c "openssl rand -base64 756 > /mongo-conf/mongodb-keyfile; chmod 600 /mongo-conf/mongodb-keyfile; chown 999 /mongo-conf/mongodb-keyfile"'

  # primary node
  mongo-primary:
    container_name: mongo-primary
    image: mongo:latest
    ports:
      - 27017:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: $MONGO_UN
      MONGO_INITDB_ROOT_PASSWORD: $MONGO_PW
    volumes:
      - key_auth_vol:/opt/keyfile_auth
      - mongo_vol_1:/data/db
    command: 'mongod --auth --keyFile /opt/keyfile_auth/mongodb-keyfile --replSet bosta-rs-1'
    depends_on:
      - gen_auth_key
    networks:
      mongo_net_rs1:
      
  # worker 1
  mongo-worker-1:
    container_name: mongo-worker-1
    image: mongo:latest
    ports:
      - 27018:27017
    volumes:
      - key_auth_vol:/opt/keyfile_auth
      - mongo_vol_2:/data/db
    command: 'mongod --auth --keyFile /opt/keyfile_auth/mongodb-keyfile --replSet bosta-rs-1'
    depends_on:
      - gen_auth_key
    environment:
      MONGO_INITDB_ROOT_USERNAME: $MONGO_UN
      MONGO_INITDB_ROOT_PASSWORD: $MONGO_PW
    networks:
      mongo_net_rs1:

  # worker 2
  mongo-worker-2:
    container_name: mongo-worker-2
    image: mongo:latest
    ports:
      - 27019:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: $MONGO_UN
      MONGO_INITDB_ROOT_PASSWORD: $MONGO_PW
    volumes:
      - key_auth_vol:/opt/keyfile_auth
      - mongo_vol_3:/data/db
    command: 'mongod --auth --keyFile /opt/keyfile_auth/mongodb-keyfile --replSet bosta-rs-1'
    depends_on:
      - gen_auth_key
    networks:
      mongo_net_rs1: