kubeadm部署的K8S集群证书过期更新操作步骤

报错:

[root@k8s-master01 ~]# kubectl get cs  
Unable to connect to the server: x509: certificate has expired or is not yet valid: current time 2024-10-06T01:05:49-07:00 is after 2024-05-19T11:11:43Z

查看证书过期情况:

[root@k8s-master01 ~]# kubeadm certs check-expiration 
[check-expiration] Reading configuration from the cluster...
[check-expiration] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[check-expiration] Error reading configuration from the Cluster. Falling back to default configuration

CERTIFICATE                EXPIRES                  RESIDUAL TIME   CERTIFICATE AUTHORITY   EXTERNALLY MANAGED
admin.conf                 May 19, 2024 11:11 UTC   <invalid>       ca                      no      
apiserver                  May 19, 2024 11:11 UTC   <invalid>       ca                      no      
apiserver-etcd-client      May 
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