使用kubeadm重新启动群集服务器时，重新创建kubelet沙箱为假

Question

当我重新启动主节点和工作节点时，coredns的pod显示以下错误消息，似乎它在服务器重新启动后无法重新创建kubelet。

  Normal   SandboxChanged          12s                   kubelet, izbp1dyjigsfwmw0dtl85gz  Pod sandbox changed, it will be killed and re-created.
  Warning  FailedCreatePodSandBox  11s                   kubelet, izbp1dyjigsfwmw0dtl85gz  Failed to create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "5e850ee3e8bf86688fec2badd9b0272127a0d775620a5783e7c30b4e0d412b01" network for pod "coredns-6955765f44-4xnhj": networkPlugin cni failed to set up pod "coredns-6955765f44-4xnhj_kube-system" network: open /run/flannel/subnet.env: no such file or directory

Answer 1

您可以尝试清理绒布并重新安装。

kubectl delete -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

rm -rf /var/lib/cni/
rm -rf /run/flannel
rm -rf /etc/cni/

删除与法兰绒有关的接口：

ip link 

对于每个接口法兰绒，请执行以下操作

ifconfig <name of interface from ip link> down
ip link delete <name of interface from ip link>

此法兰绒安装后

kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml

要使绒布正常工作，必须将--pod-network-cidr = 10.244.0.0 / 16传递给kubeadm init