Watch for started informers in factory.start

pkg/controller/framework/informers/factory.go

@@ -46,7 +46,11 @@ type sharedInformerFactory struct {
 	client        clientset.Interface
 	lock          sync.Mutex
 	defaultResync time.Duration
+
 	informers map[reflect.Type]framework.SharedIndexInformer
+	// startedInformers is used for tracking which informers have been started
+	// this allows calling of Start method multiple times
+	startedInformers map[reflect.Type]bool
 }
 
 // NewSharedInformerFactory constructs a new instance of sharedInformerFactory
@@ -55,6 +59,7 @@ func NewSharedInformerFactory(client clientset.Interface, defaultResync time.Dur
 		client:           client,
 		defaultResync:    defaultResync,
 		informers:        make(map[reflect.Type]framework.SharedIndexInformer),
+		startedInformers: make(map[reflect.Type]bool),
 	}
 }
 
@@ -63,8 +68,11 @@ func (s *sharedInformerFactory) Start(stopCh <-chan struct{}) {
 	s.lock.Lock()
 	defer s.lock.Unlock()
 
-	for _, informer := range s.informers {
+	for informerType, informer := range s.informers {
+		if !s.startedInformers[informerType] {
 			go informer.Run(stopCh)
+			s.startedInformers[informerType] = true
+		}
 	}
 }