MCSAPIVersion = env.Register("MCS_API_VERSION", "v1alpha1",
		"The version to be used for the Kubernetes Multi-Cluster Services (MCS) API.").Get()

	EnableMCSAutoExport = env.Register(
		"ENABLE_MCS_AUTO_EXPORT",
		false,
		"If enabled, istiod will automatically generate Kubernetes "+
			"Multi-Cluster Services (MCS) ServiceExport resources for every "+

				} else {
					go patcher.Run(clusterStopCh)
				}
			}
		}
	}()

	// setting up the serviceexport controller if and only if it is turned on in the meshconfig.
	if features.EnableMCSAutoExport {
		log.Infof("joining leader-election for %s in %s on cluster %s",
			leaderelection.ServiceExportController, options.SystemNamespace, options.ClusterID)