feat(vrf): delete bridge and vxlan netdevs

Fixes #120

Signed-off-by: Boris Glimcher <Boris.Glimcher@emc.com>

pkg/evpn/vrf.go

@@ -185,6 +185,47 @@ func (s *Server) DeleteVrf(_ context.Context, in *pb.DeleteVrfRequest) (*emptypb
 		fmt.Printf("Failed to delete link: %v", err)
 		return nil, err
 	}
+	// delete bridge and vxlan only if VNI value is not empty
+	if obj.Spec.Vni != nil {
+		// use netlink to find BRIDGE device
+		bridgeName := fmt.Sprintf("br%d", *obj.Spec.Vni)
+		bridgedev, err := netlink.LinkByName(bridgeName)
+		log.Printf("Deleting BRIDGE %v", bridgedev)
+		if err != nil {
+			err := status.Errorf(codes.NotFound, "unable to find key %s", resourceID)
+			log.Printf("error: %v", err)
+			return nil, err
+		}
+		// bring link down
+		if err := netlink.LinkSetDown(bridgedev); err != nil {
+			fmt.Printf("Failed to up link: %v", err)
+			return nil, err
+		}
+		// use netlink to delete BRIDGE device
+		if err := netlink.LinkDel(bridgedev); err != nil {
+			fmt.Printf("Failed to delete link: %v", err)
+			return nil, err
+		}
+		// use netlink to find VXLAN device
+		vxlanName := fmt.Sprintf("vni%d", *obj.Spec.Vni)
+		vxlandev, err := netlink.LinkByName(vxlanName)
+		log.Printf("Deleting VXLAN %v", vxlandev)
+		if err != nil {
+			err := status.Errorf(codes.NotFound, "unable to find key %s", resourceID)
+			log.Printf("error: %v", err)
+			return nil, err
+		}
+		// bring link down
+		if err := netlink.LinkSetDown(vxlandev); err != nil {
+			fmt.Printf("Failed to up link: %v", err)
+			return nil, err
+		}
+		// use netlink to delete VXLAN device
+		if err := netlink.LinkDel(vxlandev); err != nil {
+			fmt.Printf("Failed to delete link: %v", err)
+			return nil, err
+		}
+	}
 	// remove from the Database
 	delete(s.Vrfs, obj.Name)
 	return &emptypb.Empty{}, nil