驱逐node节点上的pod
kubectl drain node01 --delete-local-data
将该节点从集群中删除
kubectl delete node node01
删除加入集群时候自动申请的key
[root@node01 kubernetes]# pwd /etc/kubernetes [root@node01 kubernetes]# tree . ├── cfg │ ├── back │ │ ├── kubelet.kubeconfig │ │ └── kubelet.kubeconfig.bak │ ├── kubelet-bootstrap.kubeconfig │ ├── kubelet.conf │ ├── kubelet-config.yml │ ├── kubelet.kubeconfig │ ├── kube-proxy.conf │ ├── kube-proxy-config.yml │ └── kube-proxy.kubeconfig └── ssl ├── admin-key.pem ├── admin.pem ├── back │ ├── kubelet-client-2022-01-09-15-39-17.pem │ ├── kubelet-client-2022-01-09-17-02-22.pem │ ├── kubelet-client-current.pem -> /etc/kubernetes/ssl/kubelet-client-2022-01-09-17-02-22.pem │ ├── kubelet.crt │ └── kubelet.key ├── ca-key.pem ├── ca.pem ├── kubelet-client-2022-01-09-17-04-51.pem ├── kubelet-client-current.pem -> /etc/kubernetes/ssl/kubelet-client-2022-01-09-17-04-51.pem ├── kubelet.crt ├── kubelet.key ├── kube-proxy-key.pem └── kube-proxy.pem [root@node01 kubernetes]# mkdir {ssl,cfg}/bak -p [root@node01 kubernetes]# mv cfg/kubelet.kubeconfig cfg/bak [root@node01 kubernetes]# mv ssl/kubelet* ssl/bak #说明：
kubelet.kubeconfig：在第一次启动时候刚刚移动那些文件并不存在，在批准加入集群的时候，自动生成的
批准加入集群
node: [root@node01 kubernetes]# systemctl restart kubelet.service master:
[root@master01 ssl]# kubectl get csr node-csr-Lgrv9T_kgkMBUZ9b11U5P6Nyzz2MIQIlSXQefH-KKlI 7m37s kubernetes.io/kube-apiserver-client-kubelet kubelet-bootstrap Pending
[root@master01 ssl]# kubectl certificate approve node-csr-Lgrv9T_kgkMBUZ9b11U5P6Nyzz2MIQIlSXQefH-KKlI
[root@master01 ssl]# kubectl get node
NAME STATUS ROLES AGE VERSION
master01 Ready master 18h v1.19.16
master02 Ready master 18h v1.19.16
master03 Ready master 18h v1.19.16
node01 Ready <none> 9m26s v1.19.16
node02 Ready <none> 9h v1.19.16
#node01已结重新加入集群了
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