fix: remove change vm subnet directly (#4102)

Signed-off-by: bobz965 <zhangbingbing2_yewu@cmss.chinamobile.com>

pkg/controller/pod.go

@@ -506,39 +506,6 @@ func (c *Controller) getPodKubeovnNets(pod *v1.Pod) ([]*kubeovnNet, error) {
 	return podNets, nil
 }
 
-func (c *Controller) changeVMSubnet(vmName, namespace, providerName, subnetName string) error {
-	ipName := ovs.PodNameToPortName(vmName, namespace, providerName)
-	ipCR, err := c.ipsLister.Get(ipName)
-	if err != nil {
-		if k8serrors.IsNotFound(err) {
-			return nil
-		}
-		err := fmt.Errorf("failed to get ip CR %s: %v", ipName, err)
-		klog.Error(err)
-		return err
-	}
-	if ipCR.Spec.Subnet != subnetName {
-		key := fmt.Sprintf("%s/%s", namespace, vmName)
-		klog.Infof("release ipam for vm %s from old subnet %s", key, ipCR.Spec.Subnet)
-		c.ipam.ReleaseAddressByPod(key, ipCR.Spec.Subnet)
-		klog.Infof("gc logical switch port %s", key)
-		if err := c.OVNNbClient.DeleteLogicalSwitchPort(key); err != nil {
-			klog.Errorf("failed to delete lsp %s, %v", key, err)
-			return err
-		}
-		// old lsp has been deleted, delete old ip cr
-		if err := c.config.KubeOvnClient.KubeovnV1().IPs().Delete(context.Background(), ipName, metav1.DeleteOptions{}); err != nil {
-			if !k8serrors.IsNotFound(err) {
-				klog.Errorf("failed to delete ip %s, %v", ipName, err)
-				return err
-			}
-		}
-		c.updateSubnetStatusQueue.Add(ipCR.Spec.Subnet)
-		// handleAddOrUpdatePod will create new lsp and new ip cr
-	}
-	return nil
-}
-
 func (c *Controller) handleAddOrUpdatePod(key string) (err error) {
 	namespace, name, err := cache.SplitMetaNamespaceKey(key)
 	if err != nil {
@@ -642,10 +609,6 @@ func (c *Controller) reconcileAllocateSubnets(cachedPod, pod *v1.Pod, needAlloca
 		pod.Annotations[fmt.Sprintf(util.AllocatedAnnotationTemplate, podNet.ProviderName)] = "true"
 		if isVMPod && c.config.EnableKeepVMIP {
 			pod.Annotations[fmt.Sprintf(util.VMAnnotationTemplate, podNet.ProviderName)] = vmName
-			if err := c.changeVMSubnet(vmName, namespace, podNet.ProviderName, subnet.Name); err != nil {
-				klog.Errorf("change subnet of pod %s/%s to %s failed: %v", namespace, name, subnet.Name, err)
-				return nil, err
-			}
 		}
 
 		if err := util.ValidatePodCidr(podNet.Subnet.Spec.CIDRBlock, ipStr); err != nil {