calico异常，
```
kubectl get pod -n kube-system
```
显示
```
NAME                                        READY   STATUS    RESTARTS   AGE
calico-kube-controllers-744cfdf676-4qqph    1/1     Running   0          31m
calico-node-8jr59                           0/1     Running   0          20s
calico-node-cs79v                           0/1     Running   0          20s
calico-node-fkstd                           0/1     Running   0          20s
coredns-7f89b7bc75-6md7d                    1/1     Running   0          53m
coredns-7f89b7bc75-p88r5                    1/1     Running   0          53m
etcd-kubernetes-master                      1/1     Running   0          53m
kube-apiserver-kubernetes-master            1/1     Running   0          53m
kube-controller-manager-kubernetes-master   1/1     Running   0          53m
kube-proxy-6tfvm                            1/1     Running   0          26m
kube-proxy-mgqv2                            1/1     Running   0          26m
kube-proxy-v25vl                            1/1     Running   0          53m
kube-scheduler-kubernetes-master            1/1     Running   0          53m
```
查看pod描述信息
```
kubectl describe pod calico-node-npjjr -n kube-system
```
显示
```
Warning  Unhealthy  72s   kubelet            Readiness probe failed: 2020-12-18 13:55:29.276 [INFO][120] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  62s  kubelet  Readiness probe failed: 2020-12-18 13:55:39.278 [INFO][156] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  52s  kubelet  Readiness probe failed: 2020-12-18 13:55:49.283 [INFO][189] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  42s  kubelet  Readiness probe failed: 2020-12-18 13:55:59.279 [INFO][215] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  32s  kubelet  Readiness probe failed: 2020-12-18 13:56:09.280 [INFO][249] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  22s  kubelet  Readiness probe failed: 2020-12-18 13:56:19.276 [INFO][276] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  12s  kubelet  Readiness probe failed: 2020-12-18 13:56:29.276 [INFO][302] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
  Warning  Unhealthy  2s  kubelet  Readiness probe failed: 2020-12-18 13:56:39.272 [INFO][335] confd/health.go 180: Number of node(s) with BGP peering established = 0
calico/node is not ready: BIRD is not ready: BGP not established with 172.17.0.9,172.17.0.3
```
修改calico.yaml文件
```
/*
调整calicao 网络插件的网卡发现机制，修改IP_AUTODETECTION_METHOD对应的value值。官方提供的yaml文件中，ip识别策略（IPDETECTMETHOD）没有配置，即默认为first-found，这会导致一个网络异常的ip作为nodeIP被注册，从而影响node-to-node mesh。我们可以修改成can-reach或者interface的策略，尝试连接某一个Ready的node的IP，以此选择出正确的IP。
*/

// calico.yaml 文件添加以下二行
            - name: IP_AUTODETECTION_METHOD
              value: "interface=ens.*"  # ens 根据实际网卡开头配置
 
 // 配置如下             
            - name: CLUSTER_TYPE
              value: "k8s,bgp"
            - name: IP_AUTODETECTION_METHOD
              value: "interface=ens.*"
              #或者 value: "interface=ens160"
            # Auto-detect the BGP IP address.
            - name: IP
              value: "autodetect"
            # Enable IPIP
            - name: CALICO_IPV4POOL_IPIP
              value: "Always"
```