feat: emit rollout delete event (#1893)

Signed-off-by: Hui Kang <[email protected]>

Co-authored-by: Hui Kang <[email protected]>

Author: huikang

rollout/controller.go

@@ -254,6 +254,7 @@ func NewController(cfg ControllerConfig) *Controller {
 				for _, key := range istioutil.GetRolloutDesinationRuleKeys(ro) {
 					controller.IstioController.EnqueueDestinationRule(key)
 				}
+				controller.recorder.Eventf(ro, record.EventOptions{EventReason: conditions.RolloutDeletedReason}, conditions.RolloutDeletedMessage, ro.Name, ro.Namespace)
 			}
 		},
 	})

utils/conditions/conditions.go

@@ -129,6 +129,9 @@ const (
 	// within the given deadline (progressDeadlineSeconds).
 	RolloutTimeOutMessage = "Rollout %q has timed out progressing."
 
+	RolloutDeletedReason  = "RolloutDeleted"
+	RolloutDeletedMessage = "Rollout %s/%s is deleted."
+
 	ScalingReplicaSetReason  = "ScalingReplicaSet"
 	ScalingReplicaSetMessage = "Scaled %s ReplicaSet %s (revision %d) from %d to %d"