Record an event when a pod does not have exactly 1 controller.

pkg/controller/disruption/disruption.go

@@ -502,9 +502,11 @@ func (dc *DisruptionController) getExpectedPodCount(pdb *policy.PodDisruptionBud
 			}
 			if controllerCount == 0 {
 				err = fmt.Errorf("asked for percentage, but found no controllers for pod %q", pod.Name)
+				dc.recorder.Event(pdb, api.EventTypeWarning, "NoControllers", err.Error())
 				return
 			} else if controllerCount > 1 {
 				err = fmt.Errorf("pod %q has %v>1 controllers", pod.Name, controllerCount)
+				dc.recorder.Event(pdb, api.EventTypeWarning, "TooManyControllers", err.Error())
 				return
 			}
 		}

pkg/controller/disruption/disruption_test.go

@@ -27,6 +27,7 @@ import (
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	"k8s.io/kubernetes/pkg/apis/policy"
 	"k8s.io/kubernetes/pkg/client/cache"
+	"k8s.io/kubernetes/pkg/client/record"
 	"k8s.io/kubernetes/pkg/controller"
 	"k8s.io/kubernetes/pkg/util/intstr"
 	"k8s.io/kubernetes/pkg/util/uuid"
@@ -82,8 +83,11 @@ func newFakeDisruptionController() (*DisruptionController, *pdbStates) {
 		rsLister:    cache.StoreToReplicaSetLister{Store: cache.NewStore(controller.KeyFunc)},
 		dLister:     cache.StoreToDeploymentLister{Store: cache.NewStore(controller.KeyFunc)},
 		getUpdater:  func() updater { return ps.Set },
+		broadcaster: record.NewBroadcaster(),
 	}
 
+	dc.recorder = dc.broadcaster.NewRecorder(api.EventSource{Component: "disruption_test"})
+
 	return dc, ps
 }