func (s *KubeControllerManagerOptions) Flags(allControllers []string, disabledByDefaultControllers []string, controllerAliases map[string]string) cliflag.NamedFlagSets {
	fss := cliflag.NamedFlagSets{}
	s.Generic.AddFlags(&fss, allControllers, disabledByDefaultControllers, controllerAliases)
	s.KubeCloudShared.AddFlags(fss.FlagSet("generic"))
	s.ServiceController.AddFlags(fss.FlagSet(cpnames.ServiceLBController))

}

// KnownControllers returns all known controllers's name
func KnownControllers() []string {
	return sets.StringKeySet(NewControllerDescriptors()).List()
}

// ControllerAliases returns a mapping of aliases to canonical controller names
func ControllerAliases() map[string]string {
	aliases := map[string]string{}
	for name, c := range NewControllerDescriptors() {
		for _, alias := range c.GetAliases() {
			aliases[alias] = name