calico-node 报错calico/node is not ready: BIRD is not ready: BGP not established with

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错误

今天不知道怎么回事，一台机器的calico-node报错，也就是无法初始化正常

Events:
  Type     Reason     Age   From               Message
  ----     ------     ----  ----               -------
  Normal   Scheduled  45s   default-scheduler  Successfully assigned kube-system/calico-node-pkbkv to k8s-node2
  Normal   Started    45s   kubelet            Started container install-cni
  Normal   Pulled     45s   kubelet            Container image "docker.io/calico/cni:v3.20.0" already present on machine
  Normal   Started    45s   kubelet            Started container upgrade-ipam
  Normal   Pulled     45s   kubelet            Container image "docker.io/calico/cni:v3.20.0" already present on machine
  Normal   Created    45s   kubelet            Created container install-cni
  Normal   Created    45s   kubelet            Created container upgrade-ipam
  Normal   Started    44s   kubelet            Started container flexvol-driver
  Normal   Pulled     44s   kubelet            Container image "docker.io/calico/pod2daemon-flexvol:v3.20.0" already present on machine
  Normal   Created    44s   kubelet            Created container flexvol-driver
  Normal   Pulled     43s   kubelet            Container image "docker.io/calico/node:v3.20.0" already present on machine
  Normal   Created    43s   kubelet            Created container calico-node
  Normal   Started    43s   kubelet            Started container calico-node
  Warning  Unhealthy  40s   kubelet            Readiness probe failed: calico/node is not ready: BIRD is not ready: Error querying BIRD: unable to connect to BIRDv4 socket: dial unix /var/run/calico/bird.ctl: connect: connection refused
  Warning  Unhealthy  30s   kubelet            Readiness probe failed: 2021-09-15 02:36:49.282 [INFO][417] 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 172.17.6.120,172.17.6.121,172.17.6.122
  Warning  Unhealthy  20s  kubelet  Readiness probe failed: 2021-09-15 02:36:59.282 [INFO][497] 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 172.17.6.120,172.17.6.121,172.17.6.122
  Warning  Unhealthy  10s  kubelet  Readiness probe failed: 2021-09-15 02:37:09.280 [INFO][567] 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 172.17.6.120,172.17.6.121,172.17.6.122

解决办法

Remove interfaces related to docker and flannel:
ip link
For each interface for docker or flannel, do the following
ifconfig <name of interface from ip link> down
ip link delete <name of interface from ip link>

移除这台主机多余的docker网卡和calico

然后从重新删除这个错误pod的，就会恢复正常

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