node节点pod无法启动/节点删除网络重置，提示语："cni0" already has an IP address different from
原因：
node1之前反复添加过,添加之前需要清除下网络
# kubectl get pod -n kube-system -o wide|grep tiller
tiller-deploy-86b574cb79-wbncz 0/1 ContainerCreating 0 4m27s <none> k8s-node-3 <none> <none>
# kubectl -n kube-system describe pod tiller-deploy-86b574cb79-wbncz
Name: tiller-deploy-86b574cb79-wbncz
Namespace: kube-system
Priority: 0
Node: k8s-node-3/10.6.76.25
..
Normal SandboxChanged 87s (x12 over 112s) kubelet, k8s-node-3 Pod sandbox changed, it will be killed and re-created.
Warning FailedCreatePodSandBox 85s (x4 over 92s) kubelet, k8s-node-3 (combined from similar events): Failed create pod sandbox: rpc error: code = Unknown desc = failed to set up sandbox container "8216e206b227e96bca8153415fcaf34d26bf969c50fec99de300a955b45cb177" network for pod "tiller-deploy-86b574cb79-wbncz": NetworkPlugin cni failed to set up pod "tiller-deploy-86b574cb79-wbncz_kube-system" network: failed to set bridge addr: "cni0" already has an IP address different from 10.244.3.1/24
[root@k8s-master linux-amd64]#
在Node上执行如下操作：
重置kubernetes服务，重置网络。删除网络配置，link
kubeadm reset
systemctl stop kubelet
systemctl stop docker
rm -rf /var/lib/cni/
rm -rf /var/lib/kubelet/*
rm -rf /etc/cni/
ifconfig cni0 down
ifconfig flannel.1 down
ifconfig docker0 down
ip link delete cni0
ip link delete flannel.1
systemctl start docker
systemctl start kubelet
获取master的join token
kubeadm token create --print-join-command
重新加入节点
kubeadm join 10.6.76.26:6443 --token iweubu.ebjsywhlaklmgjep --discovery-token-ca-cert-hash sha256:f03b27e002e77fcec510e057385ce382c02171b7f28d71ac95d8ac0f7c7330b1