kubernetes重置(重装)node的flannel网络

参考：

k8s 集群部署问题整理

[Kubernetes]node节点pod无法启动/节点删除网络重置 

kubeadm reset
systemctl stop kubelet
systemctl stop docker

ifconfig cni0 down
ifconfig flannel.1 down
ifconfig del flannel.1
ifconfig del cni0

ip link del flannel.1
ip link del cni0

yum install bridge-utils
brctl delbr flannel.1
brctl delbr cni0
rm -rf /var/lib/cni/flannel/* && rm -rf /var/lib/cni/networks/cbr0/* && ip link delete cni0 && rm -rf /var/lib/cni/network/cni0/*