docker-compose-mongo.yml

version : '3.3'

services:
  mongo-setup:
    container_name: mongo-setup
    image: mongo
    restart: always
    networks:
      default:
    volumes:
      - ./scripts:/scripts
    entrypoint: [ "/scripts/setup.sh" ] # Make sure this file exists (see below for the setup.sh)
    depends_on:
      - mongo1
      - mongo2
      - mongo3
  
  mongo1:
    hostname: mongo1
    container_name: localmongo1
    image: mongo
    expose:
      - 27017
    ports:
      - 27017:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0", "--journal", "--dbpath", "/data/db", "--enableMajorityReadConcern", "false" ]
    volumes:
      - <VOLUME-DIR>/mongo/data1/db:/data/db # This is where your volume will persist. e.g. VOLUME-DIR = ./volumes/mongodb
      - <VOLUME-DIR>/mongo/data1/configdb:/data/configdb
  mongo2:
    hostname: mongo2
    container_name: localmongo2
    image: mongo
    expose:
      - 27017
    ports:
      - 27018:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0", "--journal", "--dbpath", "/data/db", "--enableMajorityReadConcern", "false" ]
    volumes:
      - <VOLUME-DIR>/mongo/data2/db:/data/db # Note the data2, it must be different to the original set.
      - <VOLUME-DIR>/mongo/data2/configdb:/data/configdb
  mongo3:
    hostname: mongo3
    container_name: localmongo3
    image: mongo
    expose:
      - 27017
    ports:
      - 27019:27017
    restart: always
    entrypoint: [ "/usr/bin/mongod", "--bind_ip_all", "--replSet", "rs0", "--journal", "--dbpath", "/data/db", "--enableMajorityReadConcern", "false" ]
    volumes:
      - <VOLUME-DIR>/mongo/data3/db:/data/db
      - <VOLUME-DIR>/mongo/data3/configdb:/data/configdb