return err
	}

	return nil
}

func init() {
	viper.SetDefault("istioNamespace", constants.IstioSystemNamespace)
	viper.SetDefault("xds-port", 15012)
}

// GetRootCmd returns the root of the cobra command-tree.
func GetRootCmd(args []string) *cobra.Command {
	rootCmd := &cobra.Command{
		Use:               "istioctl",
		Short:             "Istio control interface.",
		SilenceUsage:      true,