MongoDb ReplicaSet with Docker

docker-compose.yml

version: '3.8'

services:
  mongo1:
    image: mongo:latest
    container_name: mongo1
    networks:
      - mongo-net
    ports:
      - "27017:27017"
    links:
      - mongo2
      - mongo3
    volumes:
      - ./data/db1:/data/db
    command: --replSet rs0

  mongo2:
    image: mongo:latest
    container_name: mongo2
    networks:
      - mongo-net
    ports:
      - "27018:27017"
    volumes:
      - ./data/db2:/data/db
    command: --replSet rs0

  mongo3:
    image: mongo:latest
    container_name: mongo3
    networks:
      - mongo-net
    ports:
      - "27019:27017"
    volumes:
      - ./data/db3:/data/db
    command: --replSet rs0

networks:
  mongo-net:
    driver: bridge

init.sh

#!/bin/bash

docker-compose up -d

# Initiliaze ReplicaSet
docker exec -it mongo1 mongo --eval "rs.initiate({_id: 'rs0', members: [{_id: 0, host: 'mongo1:27017'}, {_id: 1, host: 'mongo2:27017'}, {_id: 2, host: 'mongo3:27017'}]})"