docker-compose.yml

version: "3.9"

services:
  mongo1:
    image: mongo:5
    container_name: mongo1
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "27017"]
    volumes:
      - ./data/mongo-1:/data/db
    ports:
      - 27017:27017
    healthcheck:
      test: test $$(echo "rs.initiate({_id:'my-replica-set',members:[{_id:0,host:\"mongo1:27017\"},{_id:1,host:\"mongo2:27018\"},{_id:2,host:\"mongo3:27019\"}]}).ok || rs.status().ok" | mongo --port 27017 --quiet) -eq 1
      interval: 10s
      start_period: 30s

  mongo2:
    image: mongo:5
    container_name: mongo2
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "27018"]
    volumes:
      - ./data/mongo-2:/data/db
    ports:
      - 27018:27018

  mongo3:
    image: mongo:5
    container_name: mongo3
    command: ["--replSet", "my-replica-set", "--bind_ip_all", "--port", "27019"]
    volumes:
      - ./data/mongo-3:/data/db
    ports:
      - 27019:27019
      
  mongo-express:
    image: mongo-express
    restart: always
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_MONGODB_URL: mongodb://mongo1:27017,mongo2:27018,mongo3:27019/?replicaSet=my-replica-set