kubernetes集群证书过期处理

1.kubernetes集群证书过期：

操作命令：

# kubectl get nodes
Unable to connect to the server: x509: certificate has expired or is not yet valid: current time 2022-10-17T13:32:35+08:00 is after 2022-10-15T03:15:02Z
显示信息证书已经到期。

查看kubernetes集群版本：

# kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"21", GitVersion:"v1.21.2"

2.kubernetes集群证书过期操作：

2.1 备份旧的证书：

# cp -r /etc/kubernetes/pki /etc/kubernetes/pki_bak

2.2 生成新的证书：

# kubeadm certs renew all
2.3 重启相关服务：

# docker ps | grep -v pause | grep -E "etcd|scheduler|controller|apiserver" | awk '{print $1}' | awk '{print "docker","restart",$1}' | bash

2.4 查看证书时间：

# kubeadm certs check-expiration

2.5 查看集群状态：

# kubectl get nodes
NAME       STATUS   ROLES                  AGE    VERSION
master     Ready    control-plane,master   367d   v1.21.2
worker-1   Ready                     341d   v1.21.2