升级管理节点： 1、查找最新版本号 yum list --showduplicates kubeadm 2、升级kubeadm yum install -y kubeadm-1.23.0-0 3、驱逐node上的pod，且不可调度 kubectl drain master.lab.example.com --ignore-daemonsets 4、检查集群是否可以升级，并获取可以升级的版本 kubeadm upgrade plan 如果遇到报错：[ERROR CoreDNSUnsupportedPlugins]: start version '' not supported [ERROR CoreDNSMigration]: CoreDNS will not be upgraded: start version '' not supported

 

 执行如下命令跳过这两个参数就行：kubeadm upgrade plan --ignore-preflight-errors=CoreDNSUnsupportedPlugins,CoreDNSMigration

  5、执行升级 kubeadm upgrade apply v1.23.0  --ignore-preflight-errors=CoreDNSUnsupportedPlugins,CoreDNSMigration 6、升级kubelet和kubectl yum install -y kubelet-1.23.0-0 kubectl-1.23.0-0 7、重启kubelet systemctl daemon-reload systemctl restart kubelet 8、取消不可调度，重新上线 kubectl uncordon  master.lab.example.com     --------------------------------------------------------------------- 升级node节点： 1、升级kubeadm yum install -y kubeadm-1.23.0-0 2、驱逐node上的pod，且不可调度 kubectl drain node1.lab.example.com --ignore-daemonsets 3、升级kubelet配置 kubeadm upgrade node 4、升级kubelet和kubectl yum install -y kubelet-1.23.0-0 kubectl-1.23.0-0 5、重启kubelet systemctl daemon-reload systemctl restart kubelet 6、取消不可调度，重新上线 kubectl uncordon node1.lab.example.com  -------------------------------------------------------------------------- 升级后截图：