Address comments

pkg/controller/daemon/daemoncontroller.go

@@ -563,9 +563,9 @@ func (dsc *DaemonSetsController) manage(ds *extensions.DaemonSet) error {
 	for err := range errCh {
 		errors = append(errors, err)
 	}
+	// Throw an error when the daemon pods fail, to use ratelimiter to prevent kill-recreate hot loop
 	if failedPodsObserved > 0 {
-		// Throw an error when the daemon pods fail to prevent kill-recreate hot loop
-		errors = append(errors, fmt.Errorf("Deleted %d failed pods", failedPodsObserved))
+		errors = append(errors, fmt.Errorf("deleted %d failed pods of DaemonSet %s/%s", failedPodsObserved, ds.Namespace, ds.Name))
 	}
 	return utilerrors.NewAggregate(errors)
 }

pkg/controller/daemon/daemoncontroller_test.go

@@ -661,7 +661,7 @@ func TestObservedGeneration(t *testing.T) {
 	}
 }
 
-// DaemonSet controller should kill all failed pods and recreate at most 1 failed pod.
+// DaemonSet controller should kill all failed pods and create at most 1 pod on every node.
 func TestDaemonKillFailedPods(t *testing.T) {
 	tests := []struct {
 		numFailedPods, numNormalPods, expectedCreates, expectedDeletes int