code: func loadIPVModule() error {
  	out, err := k8sexec.New().Command("modprobe", "ip_vs").CombinedOutput()
  	if err != nil {
  		glog.V(2).Infof("Error loading ip_vip: %s, %v", string(out), err)
  		return err
  	}
  
  	_, err = os.Stat("/proc/net/ip_vs")
  	return err
  }
docs: // loadIPVModule load module require to use keepalived