docker-compose.yml

version: "3.9"
services:
  mongo1:
    hostname: mongo1
    image: mongo:6
    ports:
      - 3001:27017
    environment:
      - MONGO_INITDB_ROOT_USERNAME=root
      - MONGO_INITDB_ROOT_PASSWORD=password
      - MONGO_INITDB_DATABASE=db
    entrypoint: [ "mongod", "--bind_ip_all", "--replSet", "rs0" ]
    volumes:
      - ./data/db1:/data/db
    restart: always
    healthcheck:
      test: echo 'db.runCommand("ping").ok' | mongosh localhost:27017/test --quiet
      interval: 10s
      timeout: 10s
      retries: 5
      start_period: 30s
  mongo2:
    hostname: mongo2
    image: mongo:6
    ports:
      - 3002:27017
    environment:
      - MONGO_INITDB_ROOT_USERNAME=root
      - MONGO_INITDB_ROOT_PASSWORD=password
      - MONGO_INITDB_DATABASE=db
    entrypoint: [ "mongod", "--bind_ip_all", "--replSet", "rs0" ]
    volumes:
      - ./data/db2:/data/db
    restart: always
    healthcheck:
      test: echo 'db.runCommand("ping").ok' | mongosh localhost:27017/test --quiet
      interval: 10s
      timeout: 10s
      retries: 5
      start_period: 30s
  mongo3:
    hostname: mongo3
    image: mongo:6
    ports:
      - 3003:27017
    environment:
      - MONGO_INITDB_ROOT_USERNAME=root
      - MONGO_INITDB_ROOT_PASSWORD=password
      - MONGO_INITDB_DATABASE=db
    entrypoint: [ "mongod", "--bind_ip_all", "--replSet", "rs0" ]
    volumes:
      - ./data/db3:/data/db
    restart: always
    healthcheck:
      test: echo 'db.runCommand("ping").ok' | mongosh localhost:27017/test --quiet
      interval: 10s
      timeout: 10s
      retries: 5
      start_period: 30s
  mongo-rs-initiator:
    image: mongo:6
    entrypoint: [ "bash", "/opt/rs-init.sh" ]
    volumes:
      - ./rs-init.sh:/opt/rs-init.sh:ro
    restart: no
    depends_on:
      mongo1:
        condition: service_healthy
      mongo2:
        condition: service_healthy
      mongo3:
        condition: service_healthy