fix vpc eip lost external connectivity

pkg/controller/external-gw.go

@@ -63,23 +63,33 @@ func (c *Controller) resyncExternalGateway() {
 		lastExGwCM = cm.Data
 		c.ovnLegacyClient.ExternalGatewayType = cm.Data["type"]
 		klog.Info("finish establishing ovn external gw")
+
 		cachedVpc, err := c.vpcsLister.Get(c.config.ClusterRouter)
 		if err != nil {
 			klog.Errorf("failed to get vpc %s, %v", c.config.ClusterRouter, err)
 			return
 		}
 		vpc := cachedVpc.DeepCopy()
-		vpc.Spec.EnableExternal = true
-		vpc.Status.EnableExternal = true
-		bytes, err := vpc.Status.Bytes()
-		if err != nil {
-			klog.Errorf("failed to get vpc bytes, %v", err)
-			return
+		if !vpc.Spec.EnableExternal {
+			vpc.Spec.EnableExternal = true
+			if _, err := c.config.KubeOvnClient.KubeovnV1().Vpcs().Update(context.Background(), vpc, metav1.UpdateOptions{}); err != nil {
+				errMsg := fmt.Errorf("failed to update vpc enable external %s, %v", vpc.Name, err)
+				klog.Error(errMsg)
+				return
+			}
 		}
-		if _, err = c.config.KubeOvnClient.KubeovnV1().Vpcs().Patch(context.Background(),
-			vpc.Name, types.MergePatchType, bytes, metav1.PatchOptions{}, "status"); err != nil {
-			klog.Errorf("failed to patch vpc %s, %v", c.config.ClusterRouter, err)
-			return
+		if !vpc.Status.EnableExternal {
+			vpc.Status.EnableExternal = true
+			bytes, err := vpc.Status.Bytes()
+			if err != nil {
+				klog.Errorf("failed to get vpc bytes, %v", err)
+				return
+			}
+			if _, err = c.config.KubeOvnClient.KubeovnV1().Vpcs().Patch(context.Background(),
+				vpc.Name, types.MergePatchType, bytes, metav1.PatchOptions{}, "status"); err != nil {
+				klog.Errorf("failed to patch vpc %s, %v", c.config.ClusterRouter, err)
+				return
+			}
 		}
 	}
 }

pkg/controller/subnet.go

@@ -484,6 +484,7 @@ func (c *Controller) handleAddOrUpdateSubnet(key string) error {
 		}
 		return err
 	}
+	klog.V(4).Infof("handle add or update subnet %s", cachedSubnet.Name)
 
 	subnet := cachedSubnet.DeepCopy()
 	if err = formatSubnet(subnet, c); err != nil {
@@ -640,9 +641,11 @@ func (c *Controller) handleAddOrUpdateSubnet(key string) error {
 		}
 	} else {
 		// logical switch exists, only update other_config
-		if err := c.ovnLegacyClient.SetLogicalSwitchConfig(subnet.Name, vpc.Status.Router, subnet.Spec.Protocol, subnet.Spec.CIDRBlock, subnet.Spec.Gateway, subnet.Spec.ExcludeIps, needRouter); err != nil {
-			c.patchSubnetStatus(subnet, "SetLogicalSwitchConfigFailed", err.Error())
-			return err
+		if !randomAllocateGW {
+			if err := c.ovnLegacyClient.SetLogicalSwitchConfig(subnet.Name, vpc.Status.Router, subnet.Spec.Protocol, subnet.Spec.CIDRBlock, subnet.Spec.Gateway, subnet.Spec.ExcludeIps, needRouter); err != nil {
+				c.patchSubnetStatus(subnet, "SetLogicalSwitchConfigFailed", err.Error())
+				return err
+			}
 		}
 		if !needRouter && !randomAllocateGW {
 			klog.Infof("remove connection from router %s to switch %s", vpc.Status.Router, subnet.Name)
@@ -818,7 +821,7 @@ func (c *Controller) handleDeleteSubnet(subnet *kubeovnv1.Subnet) error {
 		}
 	} else {
 		if k8serrors.IsNotFound(err) {
-			klog.Infof("remove connection from router %s to switch %s", vpc.Status.Router, subnet.Name)
+			klog.Infof("remove connection from router %s to switch %s", util.DefaultVpc, subnet.Name)
 			if err = c.ovnLegacyClient.RemoveRouterPort(subnet.Name, util.DefaultVpc); err != nil {
 				klog.Errorf("failed to delete router port %s %v", subnet.Name, err)
 				return err
@@ -1382,8 +1385,14 @@ func (c *Controller) reconcileVlan(subnet *kubeovnv1.Subnet) error {
 	if subnet.Spec.Vlan == "" {
 		return nil
 	}
-
 	klog.Infof("reconcile vlan %v", subnet.Spec.Vlan)
+	isExternalGatewaySwitch := !subnet.Spec.LogicalGateway && subnet.Name == c.config.ExternalGatewaySwitch
+	if isExternalGatewaySwitch {
+		// external gw deal this vlan subnet, just skip
+		klog.Infof("skip reconcile vlan subnet %s", c.config.ExternalGatewaySwitch)
+		return nil
+	}
+
 	vlan, err := c.vlansLister.Get(subnet.Spec.Vlan)
 	if err != nil {
 		klog.Errorf("failed to get vlan %s: %v", subnet.Spec.Vlan, err)

pkg/daemon/config.go

@@ -55,7 +55,7 @@ type Configuration struct {
 	DefaultProviderName     string
 	DefaultInterfaceName    string
 	ExternalGatewayConfigNS string
-	ExternalGatewaySwitch   string
+	ExternalGatewaySwitch   string // provider network underlay vlan subnet
 }
 
 // ParseFlags will parse cmd args then init kubeClient and configuration