我的健康检测始终是失败的，服务器也可以ping通本地，这是什么原因呢？

func Register(address string, port int, name string, tags []string, id string) error {
   cfg := api.DefaultConfig()
   cfg.Address = "192.168.1.8:8500"
   client, err := api.NewClient(cfg)
if err != nil {
panic(err)
   }
//生成对应的检查对象
   check := &api.AgentServiceCheck{
      HTTP:                           "http://192.168.1.6:8021/health",
      Timeout:                        "5s",
      Interval:                       "5s",
      DeregisterCriticalServiceAfter: "10s",
   }
//生成注册对象，
   registration := new(api.AgentServiceRegistration)
   registration.Name = name
   registration.ID = id
   registration.Port = port
   registration.Tags = tags
   registration.Address = address
   registration.Check = check
   err = client.Agent().ServiceRegister(registration)
if err != nil {
panic(err)
   }
return nil
}

func main() {
   _ = Register("192.168.1.6", 8021, "user-web", []string{"mxshop", "duhf"}, "user-web")
}