Long:  "The dump subcommand dumps the Istio operator controller manifest.",
		Args:  cobra.ExactArgs(0),
		PreRunE: func(cmd *cobra.Command, args []string) error {
			if !labels.IsDNS1123Label(odArgs.common.revision) && cmd.PersistentFlags().Changed("revision") {
				return fmt.Errorf("invalid revision specified: %v", odArgs.common.revision)
			}
			return nil
		},

		Long:  "The init subcommand installs the Istio operator controller in the cluster.",
		Args:  cobra.ExactArgs(0),
		PreRunE: func(cmd *cobra.Command, args []string) error {
			if !labels.IsDNS1123Label(oiArgs.common.revision) && cmd.PersistentFlags().Changed("revision") {
				return fmt.Errorf("invalid revision specified: %v", oiArgs.common.revision)
			}
			return nil
		},

`,
		Args: cobra.ExactArgs(0),
		PreRunE: func(cmd *cobra.Command, args []string) error {
			if !labels.IsDNS1123Label(iArgs.Revision) && cmd.PersistentFlags().Changed("revision") {
				return fmt.Errorf("invalid revision specified: %v", iArgs.Revision)
			}
			return nil
		},
		RunE: func(cmd *cobra.Command, args []string) error {

}

func (o *RemoteSecretOptions) prepare(ctx cli.Context) error {
	o.KubeOptions.prepare(ctx)

	if o.ClusterName != "" {
		if !labels.IsDNS1123Label(o.ClusterName) {
			return fmt.Errorf("%v is not a valid DNS 1123 label", o.ClusterName)
		}
	}
	return nil
}

type Warning error

- IsFullyQualifiedDomainName() validates each label based on IsDNS1123Label. ([#90172](https://github.com/kubernetes/kubernetes/pull/90172), [@nak3](https://github.com/nak3)) [SIG API Machinery and Network]