a list type object ListFunc: func(lo metav1.ListOptions) (runtime.Object, error) { return client.Core().Nodes().List(lo) }, // Watch should return a watch Interface. begin a watch at the specified version. WatchFunc: func(lo metav1.ListOptions) (watch.Interface, error) { return client.Core().Nodes().Watch(lo) }, }, // The types of objects this informer will return &v1.Node{}, // The resync period of this object 10*time.Second, // the object you want notifications sent to cache.ResourceEventHandlerFuncs{ // AddFunc: func(obj interface{}) {} UpdateFunc: func(old, newObj interface{}) { … }, // DeleteFunc: func(obj interface{}) {} }, )