docker跑mongo主从复制

这是docker-compose.yml

version: '3.1'

services:

  mongo:
    container_name: 'mongo'
    hostname: 'mongo'
    image: mongo
    restart: always
    volumes:
      - ./root/mongo:/root/mongo
      - ./root/mongo/db:/data/db
    networks:
      - web
    ports:
      - 27017:27017
    environment:
      MONGO_INITDB_ROOT_USERNAME: 'root'
      MONGO_INITDB_ROOT_PASSWORD: 'e7b9e773f9c00abdaf8bb97babe352ae'
    entrypoint:
      - bash
      - -c
      - |
        cp /root/mongo/replica.key /data/replica.key
        chmod 400 /data/replica.key
        chown 999:999 /data/replica.key
        exec docker-entrypoint.sh $$@
    command: "mongod --bind_ip_all --replSet rs0 --keyFile /data/replica.key"

  mongo-express:
    container_name: 'mongo-express'
    image: mongo-express
    restart: always
    networks:
      - web
    ports:
      - 8081:8081
    environment:
      ME_CONFIG_BASICAUTH_USERNAME: 'admin'
      ME_CONFIG_BASICAUTH_PASSWORD: 'admin'
      ME_CONFIG_MONGODB_URL: 'mongodb://root:e7b9e773f9c00abdaf8bb97babe352ae@mongo:27017'


networks:
  web:
    external: true