无法从其他服务连接到mongodb服务

Question

OS：MacOS莫哈韦沙漠

version: '3.1'

services:  
  apiWithKubernetesMongodb:
    container_name: apiWithKubernetesMongodb
    image: mongo
    ports:
      - "27018:27018"
    expose:
      - "27018"
    command: --bind_ip_all --port 27018
    hostname: mongodb
    environment:
      MONGO_INITDB_ROOT_USERNAME: mongousradmin
      MONGO_INITDB_ROOT_PASSWORD: mongopassadmin
      MONGO_INITDB_DATABASE: admin
    networks:
      - apinet

  apiWithKubernetes: 
    container_name: api_with_kubernetes
    image: sherryummen/api_with_kubernetes:v1
    build: 
      context: .
      dockerfile: Dockerfile
    networks:
      - apinet
    volumes:
      - .:/go/src/api_with_kubernetes
    ports:
      - 8080:8080
    depends_on:
      - apiWithKubernetesMongodb
    links:
      - apiWithKubernetesMongodb

networks:
  apinet:
    driver: bridge

const (
    HOST           = "apiWithKubernetesMongodb"
    PORT           = 27018
    DBNAME         = "service_db"
    COLLECTIONNAME = "user_info"
    ROOTUSER       = "mongousradmin"
    ROOTPASSWORD   = "mongopassadmin"
)

client, err := mongo.NewClient(options.Client().ApplyURI(fmt.Sprintf("mongodb://%s:%s@%s:%d/admin", ROOTUSER, ROOTPASSWORD, HOST, PORT)))

我在docker文件上方拥有您，并进入了应该连接到mongodb的api。

但是我的执行代码给出错误“服务器选择超时\ n当前拓扑：类型：未知\ n服务器：\ nAddr：apiwithkubernetesmongodb：27018，类型：未知，状态：已连接，平均RTT：0，最后错误：connection（apiwithkubernetesmongodb： 27018 [-249]）连接已关闭”

注意：对于那些迷失了方向的人来说，这全都与服务名称的大小写有关，切换到所有小写字母命名后，它便开始起作用。