我采用了@zerkms的建议，代码如下：

+       CILIUM_K8S                      = "cilium-k8s"
+       CiliumK8sNodeSubnetAnnotation12 = "io.cilium.network.ipv4-pod-cidr"
+       CiliumK8sNodeSubnetAnnotation13 = "network.cilium.io/ipv4-pod-cidr"

+func ciliumPodCidr(annotation map[string]string) string {
+       if subnet, ok := annotation[CiliumK8sNodeSubnetAnnotation13]; ok {
+               return subnet
+       } else if subnet, ok := annotation[CiliumK8sNodeSubnetAnnotation12]; ok {
+               return subnet
+       }
+       return ""
+}

+               } else if ctlr.OrchestrationCNI == CILIUM_K8S {
+                       nodesubnet := ciliumPodCidr(node.ObjectMeta.Annotations)
+                       if nodesubnet == "" {
+                               log.Warningf("Cilium node podCIDR annotation not found on node %v, node has spec.podCIDR ?", node.Name)
+                               continue
+                       } else {
+                               route.Network = nodesubnet
+                               nodeAddrs := node.Status.Addresses
+                               for _, addr := range nodeAddrs {
+                                       if addr.Type == addrType {
+                                               route.Gateway = addr.Address
+                                               route.Name = fmt.Sprintf("k8s-%v-%v", node.Name, addr.Address)
+                                       }
+                               }
+
+                       }