// open browser or not, default is true
	browser = true

	// label selector
	labelSelector = ""

	proxyAdminPort int
)

const (
	defaultPrometheusPort = 9090
	defaultGrafanaPort    = 3000
	defaultKialiPort      = 20001
	defaultJaegerPort     = 16686
	defaultZipkinPort     = 9411
	defaultSkywalkingPort = 8080
)

// port-forward to Istio System Prometheus; open browser

  # Wait until 99% of the proxies receive the distribution, timing out after 5 minutes
  istioctl experimental wait --for=distribution --threshold=.99 --timeout=300s virtualservice bookinfo.default
`,
		RunE: func(cmd *cobra.Command, args []string) error {
			if forFlag == "delete" {
				return errors.New("wait for delete is not yet implemented")
			} else if forFlag != "distribution" {