Initialize node ahead in case we need to refer to it in error cases. …

…This is a backport of kubernetes#58186. We cannot intact backport to it due to a refactor PR kubernetes#56352.

pkg/controller/node/ipam/cloud_cidr_allocator.go

@@ -191,10 +191,14 @@ func (ca *cloudCIDRAllocator) AllocateOrOccupyCIDR(node *v1.Node) error {
 
 // updateCIDRAllocation assigns CIDR to Node and sends an update to the API server.
 func (ca *cloudCIDRAllocator) updateCIDRAllocation(nodeName string) error {
-	var err error
-	var node *v1.Node
 	defer ca.removeNodeFromProcessing(nodeName)
 
+	node, err := ca.nodeLister.Get(nodeName)
+	if err != nil {
+		glog.Errorf("Failed while getting node %v for updating Node.Spec.PodCIDR: %v", nodeName, err)
+		return err
+	}
+
 	cidrs, err := ca.cloud.AliasRanges(types.NodeName(nodeName))
 	if err != nil {
 		util.RecordNodeStatusChange(ca.recorder, node, "CIDRNotAvailable")