Skip validation checks if an ingress is marked as deleted (#7216)

Signed-off-by: Aditya Sharma <git@adi.run>

internal/ingress/controller/controller.go

@@ -214,6 +214,11 @@ func (n *NGINXController) CheckIngress(ing *networking.Ingress) error {
 		return nil
 	}
 
+	// Skip checks if the ingress is marked as deleted
+	if !ing.DeletionTimestamp.IsZero() {
+		return nil
+	}
+
 	if !class.IsValid(ing) {
 		klog.Warningf("ignoring ingress %v in %v based on annotation %v", ing.Name, ing.ObjectMeta.Namespace, class.IngressKey)
 		return nil

internal/ingress/controller/controller_test.go

@@ -294,6 +294,16 @@ func TestCheckIngress(t *testing.T) {
 			}
 		})
 	})
+
+	t.Run("When the ingress is marked as deleted", func(t *testing.T) {
+		ing.DeletionTimestamp = &metav1.Time{
+			Time: time.Now(),
+		}
+
+		if nginx.CheckIngress(ing) != nil {
+			t.Errorf("when the ingress is marked as deleted, no error should be returned")
+		}
+	})
 }
 
 func TestMergeAlternativeBackends(t *testing.T) {