the Kubernetes Multi-Cluster Services (MCS) spec. This feature is off by default,
    but can be enabled by setting the following flags in Istio:
    `ENABLE_MCS_CLUSTER_LOCAL`, `ENABLE_MCS_HOST` and `ENABLE_MCS_SERVICE_DISCOVERY`.
    When enabled, requests to the `cluster.local` host will be routed to only those

			"must be enabled or an MCS controller must be used. Requires "+
			"that ENABLE_MCS_SERVICE_DISCOVERY also be enabled.").Get() &&
		EnableMCSServiceDiscovery

	EnableMCSClusterLocal = env.Register(
		"ENABLE_MCS_CLUSTER_LOCAL",
		false,
		"If enabled, istiod will treat the host "+
			"`<svc>.<namespace>.svc.cluster.local` as defined by the "+
			"Kubernetes Multi-Cluster Services (MCS) spec. In this mode, "+

	cfg.ControlPlaneValues = fmt.Sprintf(`
values:
  pilot:
    env:
      ENABLE_MCS_SERVICE_DISCOVERY: "true"
      ENABLE_MCS_HOST: "true"
      ENABLE_MCS_CLUSTER_LOCAL: "true"
      MCS_API_GROUP: %s
      MCS_API_VERSION: %s`,
		common.KubeSettings(t).MCSAPIGroup,
		common.KubeSettings(t).MCSAPIVersion)
}

func runForAllClusterCombinations(