[feat] add support for using linode interfaces (beta-only)

cloud/linode/client/client.go

@@ -36,6 +36,9 @@ type Client interface {
 
 	UpdateInstanceConfigInterface(context.Context, int, int, int, linodego.InstanceConfigInterfaceUpdateOptions) (*linodego.InstanceConfigInterface, error)
 
+	ListInterfaces(ctx context.Context, linodeID int, opts *linodego.ListOptions) ([]linodego.LinodeInterface, error)
+	UpdateInterface(ctx context.Context, linodeID int, interfaceID int, opts linodego.LinodeInterfaceUpdateOptions) (*linodego.LinodeInterface, error)
+
 	GetVPC(context.Context, int) (*linodego.VPC, error)
 	GetVPCSubnet(context.Context, int, int) (*linodego.VPCSubnet, error)
 	ListVPCs(context.Context, *linodego.ListOptions) ([]linodego.VPC, error)

cloud/linode/route_controller.go

@@ -157,6 +157,7 @@ func (r *routes) CreateRoute(ctx context.Context, clusterName string, nameHint s
 
 	// check already configured routes
 	intfRoutes := []string{}
+	linodeInterfaceRoutes := []linodego.VPCInterfaceIPv4RangeCreateOptions{}
 	intfVPCIP := linodego.VPCIP{}
 
 	for _, vpcid := range services.GetAllVPCIDs() {
@@ -176,6 +177,9 @@ func (r *routes) CreateRoute(ctx context.Context, clusterName string, nameHint s
 			}
 
 			intfRoutes = append(intfRoutes, *ir.AddressRange)
+			linodeInterfaceRoutes = append(linodeInterfaceRoutes, linodego.VPCInterfaceIPv4RangeCreateOptions{
+				Range: *ir.AddressRange,
+			})
 		}
 	}
 
@@ -184,16 +188,11 @@ func (r *routes) CreateRoute(ctx context.Context, clusterName string, nameHint s
 	}
 
 	intfRoutes = append(intfRoutes, route.DestinationCIDR)
-	interfaceUpdateOptions := linodego.InstanceConfigInterfaceUpdateOptions{
-		IPRanges: &intfRoutes,
-	}
+	linodeInterfaceRoutes = append(linodeInterfaceRoutes, linodego.VPCInterfaceIPv4RangeCreateOptions{
+		Range: route.DestinationCIDR,
+	})
 
-	resp, err := r.client.UpdateInstanceConfigInterface(ctx, instance.ID, intfVPCIP.ConfigID, intfVPCIP.InterfaceID, interfaceUpdateOptions)
-	if err != nil {
-		return err
-	}
-	klog.V(4).Infof("Added routes for node %s. Current routes: %v", route.TargetNode, resp.IPRanges)
-	return nil
+	return r.handleInterfaces(ctx, intfRoutes, linodeInterfaceRoutes, instance, intfVPCIP, route)
 }
 
 // DeleteRoute removes route's subnet from ip_ranges of target node's VPC interface
@@ -210,6 +209,7 @@ func (r *routes) DeleteRoute(ctx context.Context, clusterName string, route *clo
 
 	// check already configured routes
 	intfRoutes := []string{}
+	linodeInterfaceRoutes := []linodego.VPCInterfaceIPv4RangeCreateOptions{}
 	intfVPCIP := linodego.VPCIP{}
 
 	for _, vpcid := range services.GetAllVPCIDs() {
@@ -228,21 +228,46 @@ func (r *routes) DeleteRoute(ctx context.Context, clusterName string, route *clo
 			}
 
 			intfRoutes = append(intfRoutes, *ir.AddressRange)
+			linodeInterfaceRoutes = append(linodeInterfaceRoutes, linodego.VPCInterfaceIPv4RangeCreateOptions{
+				Range: *ir.AddressRange,
+			})
 		}
 	}
 
 	if intfVPCIP.Address == nil {
 		return fmt.Errorf("unable to remove route %s for node %s. no valid interface found", route.DestinationCIDR, route.TargetNode)
 	}
 
-	interfaceUpdateOptions := linodego.InstanceConfigInterfaceUpdateOptions{
-		IPRanges: &intfRoutes,
-	}
-	resp, err := r.client.UpdateInstanceConfigInterface(ctx, instance.ID, intfVPCIP.ConfigID, intfVPCIP.InterfaceID, interfaceUpdateOptions)
-	if err != nil {
-		return err
+	return r.handleInterfaces(ctx, intfRoutes, linodeInterfaceRoutes, instance, intfVPCIP, route)
+}
+
+// handleInterfaces updates the VPC interface with adding or deleting routes
+func (r *routes) handleInterfaces(ctx context.Context, intfRoutes []string, linodeInterfaceRoutes []linodego.VPCInterfaceIPv4RangeCreateOptions, instance *linodego.Instance, intfVPCIP linodego.VPCIP, route *cloudprovider.Route) error {
+	if instance.InterfaceGeneration == linodego.GenerationLinode {
+		interfaceUpdateOptions := linodego.LinodeInterfaceUpdateOptions{
+			VPC: &linodego.VPCInterfaceCreateOptions{
+				SubnetID: intfVPCIP.SubnetID,
+				IPv4:     &linodego.VPCInterfaceIPv4CreateOptions{Ranges: linodeInterfaceRoutes},
+			},
+		}
+		resp, err := r.client.UpdateInterface(ctx, instance.ID, intfVPCIP.InterfaceID, interfaceUpdateOptions)
+		if err != nil {
+			klog.V(4).Infof("Unable to update legacy interface %d for node %s", intfVPCIP.InterfaceID, route.TargetNode)
+			return err
+		}
+		klog.V(4).Infof("Updated routes for node %s. Current routes: %v", route.TargetNode, resp.VPC.IPv4.Ranges)
+	} else {
+		interfaceUpdateOptions := linodego.InstanceConfigInterfaceUpdateOptions{
+			IPRanges: &intfRoutes,
+		}
+		resp, err := r.client.UpdateInstanceConfigInterface(ctx, instance.ID, intfVPCIP.ConfigID, intfVPCIP.InterfaceID, interfaceUpdateOptions)
+		if err != nil {
+			klog.V(4).Infof("Unable to update linode interface %d for node %s", intfVPCIP.InterfaceID, route.TargetNode)
+			return err
+		}
+		klog.V(4).Infof("Updated routes for node %s. Current routes: %v", route.TargetNode, resp.IPRanges)
 	}
-	klog.V(4).Infof("Deleted route for node %s. Current routes: %v", route.TargetNode, resp.IPRanges)
+
 	return nil
 }
 

cloud/linode/route_controller_test.go

@@ -393,6 +393,38 @@ func TestCreateRoute(t *testing.T) {
 		assert.NoError(t, err)
 	})
 
+	interfaceWithVPCAndRoute := linodego.LinodeInterface{
+		ID: services.VpcIDs["dummy"],
+		VPC: &linodego.VPCInterface{
+			IPv4: linodego.VPCInterfaceIPv4{
+				Ranges: []linodego.VPCInterfaceIPv4Range{{Range: "10.10.10.0/24"}},
+			},
+		},
+	}
+	validInstance.InterfaceGeneration = linodego.GenerationLinode
+	t.Run("should return no error if instance exists, connected to VPC we add a route with linode interfaces", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		client := mocks.NewMockClient(ctrl)
+		instanceCache := services.NewInstances(client)
+		existingK8sCache := registeredK8sNodeCache
+		defer func() {
+			registeredK8sNodeCache = existingK8sCache
+		}()
+		registeredK8sNodeCache = newK8sNodeCache()
+		registeredK8sNodeCache.addNodeToCache(node)
+		routeController, err := newRoutes(client, instanceCache)
+		require.NoError(t, err)
+
+		client.EXPECT().ListInstances(gomock.Any(), nil).Times(1).Return([]linodego.Instance{validInstance}, nil)
+		client.EXPECT().ListVPCIPAddresses(gomock.Any(), gomock.Any(), gomock.Any()).Times(2).Return(noRoutesInVPC, nil)
+		client.EXPECT().ListVPCIPv6Addresses(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes().Return([]linodego.VPCIP{}, nil)
+		client.EXPECT().UpdateInterface(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(1).Return(&interfaceWithVPCAndRoute, nil)
+		err = routeController.CreateRoute(ctx, "dummy", "dummy", route)
+		assert.NoError(t, err)
+	})
+	validInstance.InterfaceGeneration = ""
+
 	v6Route := &cloudprovider.Route{
 		Name:            "route2",
 		TargetNode:      types.NodeName(name),
@@ -552,6 +584,29 @@ func TestDeleteRoute(t *testing.T) {
 		assert.NoError(t, err)
 	})
 
+	interfaceWitVPCAndNoRoute := linodego.LinodeInterface{
+		ID:  services.VpcIDs["dummy"],
+		VPC: &linodego.VPCInterface{IPv4: linodego.VPCInterfaceIPv4{Ranges: nil}},
+	}
+
+	validInstance.InterfaceGeneration = linodego.GenerationLinode
+	t.Run("should return no error if instance exists, connected to VPC, route doesn't exist and we try to delete route with linode interfaces", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		client := mocks.NewMockClient(ctrl)
+		instanceCache := services.NewInstances(client)
+		routeController, err := newRoutes(client, instanceCache)
+		require.NoError(t, err)
+
+		client.EXPECT().ListInstances(gomock.Any(), nil).Times(1).Return([]linodego.Instance{validInstance}, nil)
+		client.EXPECT().ListVPCIPAddresses(gomock.Any(), gomock.Any(), gomock.Any()).Times(2).Return(noRoutesInVPC, nil)
+		client.EXPECT().ListVPCIPv6Addresses(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes().Return([]linodego.VPCIP{}, nil)
+		client.EXPECT().UpdateInterface(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(1).Return(&interfaceWitVPCAndNoRoute, nil)
+		err = routeController.DeleteRoute(ctx, "dummy", route)
+		assert.NoError(t, err)
+	})
+	validInstance.InterfaceGeneration = ""
+
 	routesInVPC := []linodego.VPCIP{
 		{
 			Address:      &vpcIP,
@@ -584,4 +639,21 @@ func TestDeleteRoute(t *testing.T) {
 		err = routeController.DeleteRoute(ctx, "dummy", route)
 		assert.NoError(t, err)
 	})
+
+	validInstance.InterfaceGeneration = linodego.GenerationLinode
+	t.Run("should return no error if instance exists, connected to VPC and route is deleted with linode interfaces", func(t *testing.T) {
+		ctrl := gomock.NewController(t)
+		defer ctrl.Finish()
+		client := mocks.NewMockClient(ctrl)
+		instanceCache := services.NewInstances(client)
+		routeController, err := newRoutes(client, instanceCache)
+		require.NoError(t, err)
+
+		client.EXPECT().ListInstances(gomock.Any(), nil).Times(1).Return([]linodego.Instance{validInstance}, nil)
+		client.EXPECT().ListVPCIPAddresses(gomock.Any(), gomock.Any(), gomock.Any()).Times(2).Return(routesInVPC, nil)
+		client.EXPECT().ListVPCIPv6Addresses(gomock.Any(), gomock.Any(), gomock.Any()).AnyTimes().Return([]linodego.VPCIP{}, nil)
+		client.EXPECT().UpdateInterface(gomock.Any(), gomock.Any(), gomock.Any(), gomock.Any()).Times(1).Return(&interfaceWitVPCAndNoRoute, nil)
+		err = routeController.DeleteRoute(ctx, "dummy", route)
+		assert.NoError(t, err)
+	})
 }

cloud/nodeipam/ipam/cloud_allocator.go

@@ -337,6 +337,16 @@ func getIPv6RangeFromInterface(iface linodego.InstanceConfigInterface) string {
 	return ""
 }
 
+func getIPv6RangeFromLinodeInterface(iface linodego.LinodeInterface) string {
+	if len(iface.VPC.IPv6.SLAAC) > 0 {
+		return iface.VPC.IPv6.SLAAC[0].Range
+	}
+	if len(iface.VPC.IPv6.Ranges) > 0 {
+		return iface.VPC.IPv6.Ranges[0].Range
+	}
+	return ""
+}
+
 // allocateIPv6CIDR allocates an IPv6 CIDR for the given node.
 // It retrieves the instance configuration for the node and extracts the IPv6 range.
 // It then creates a new net.IPNet with the IPv6 address and mask size defined
@@ -355,24 +365,49 @@ func (c *cloudAllocator) allocateIPv6CIDR(ctx context.Context, node *v1.Node) (*
 	if err != nil {
 		return nil, fmt.Errorf("failed to parse Linode ID from ProviderID %s: %w", node.Spec.ProviderID, err)
 	}
-	// Retrieve the instance configuration for the Linode ID
-	configs, err := c.linodeClient.ListInstanceConfigs(ctx, id, &linodego.ListOptions{})
-	if err != nil || len(configs) == 0 {
-		return nil, fmt.Errorf("failed to list instance configs: %w", err)
-	}
 
+	// fetch the instance so we can determine which interface generation to use
+	instance, err := c.linodeClient.GetInstance(ctx, id)
+	if err != nil {
+		return nil, fmt.Errorf("failed get linode with id %d: %w", id, err)
+	}
 	ipv6Range := ""
-	for _, iface := range configs[0].Interfaces {
-		if iface.Purpose == linodego.InterfacePurposeVPC {
-			ipv6Range = getIPv6RangeFromInterface(iface)
-			if ipv6Range != "" {
-				break
+	if instance.InterfaceGeneration == linodego.GenerationLinode {
+		ifaces, listErr := c.linodeClient.ListInterfaces(ctx, id, &linodego.ListOptions{})
+		if listErr != nil || len(ifaces) == 0 {
+			return nil, fmt.Errorf("failed to list interfaces: %w", listErr)
+		}
+		for _, iface := range ifaces {
+			if iface.VPC != nil {
+				ipv6Range = getIPv6RangeFromLinodeInterface(iface)
+				if ipv6Range != "" {
+					break
+				}
 			}
 		}
-	}
 
-	if ipv6Range == "" {
-		return nil, fmt.Errorf("failed to find ipv6 range in instance config: %v", configs[0])
+		if ipv6Range == "" {
+			return nil, fmt.Errorf("failed to find ipv6 range in Linode interfaces: %v", ifaces)
+		}
+	} else {
+		// Retrieve the instance configuration for the Linode ID
+		configs, listErr := c.linodeClient.ListInstanceConfigs(ctx, id, &linodego.ListOptions{})
+		if listErr != nil || len(configs) == 0 {
+			return nil, fmt.Errorf("failed to list instance configs: %w", listErr)
+		}
+
+		for _, iface := range configs[0].Interfaces {
+			if iface.Purpose == linodego.InterfacePurposeVPC {
+				ipv6Range = getIPv6RangeFromInterface(iface)
+				if ipv6Range != "" {
+					break
+				}
+			}
+		}
+
+		if ipv6Range == "" {
+			return nil, fmt.Errorf("failed to find ipv6 range in instance config: %v", configs[0])
+		}
 	}
 
 	ip, _, err := net.ParseCIDR(ipv6Range)