在卸载K8s组件前，先执行kubeadm reset命令，清空K8s集群设置卸载管理组件
kubeadm reset
卸载管理组件
yum erase -y kubelet kubectl kubeadm kubernetes-cni
docker全部清理
docker rm $(docker ps -a -q)
docker rmi $(docker images -q)
docker 重启
systemctl daemon-reload
systemctl restart docker
systemctl stop docker service
