use GenerateName to autogenerate event name

Author: boddumanohar

neonvm-runner/cmd/main.go

@@ -1156,10 +1156,17 @@ func emitPVCEvent(ctx context.Context, logger *zap.Logger, clientset *kubernetes
 		return
 	}
 	now := metav1.Now()
+	// Use GenerateName so the API server assigns a unique suffix.
+	// Using Name with pvcName as a prefix could exceed the 253-char
+	// Kubernetes name limit for long PVC names.
+	prefix := pvcName
+	if len(prefix) > 63 {
+		prefix = prefix[:63]
+	}
 	event := &corev1.Event{
 		ObjectMeta: metav1.ObjectMeta{
-			Name:      fmt.Sprintf("%s.%016x", pvcName, now.UnixNano()),
-			Namespace: namespace,
+			GenerateName: prefix + "-",
+			Namespace:    namespace,
 		},
 		InvolvedObject: corev1.ObjectReference{
 			Kind:       "PersistentVolumeClaim",