fix pvc not created when first deployed

Author: smiletan

pkg/controller/sub_controller/sub_controller.go

@@ -358,7 +358,10 @@ func (d *SubDefaultController) RestrictConditionsEqual(nst *appv1.StatefulSet, e
 	//shield persistent volume update when the pvcProvider=Operator
 	//in webhook should intercept the volume spec updated when use statefulset pvc.
 	// TODO: updates to statefulset spec for fields other than 'replicas', 'template', 'updateStrategy', 'persistentVolumeClaimRetentionPolicy' and 'minReadySeconds' are forbidden
-	nst.Spec.VolumeClaimTemplates = est.Spec.VolumeClaimTemplates
+	//if create est vct is empty, should not assign to new st.
+	if len(est.Spec.VolumeClaimTemplates) !=0 {
+		nst.Spec.VolumeClaimTemplates = est.Spec.VolumeClaimTemplates
+	}
 }
 
 // PrepareReconcileResources prepare resource for reconcile