本人是使用kuboard安装Kubernetes

https://kuboard.cn/install/install-k8s.html#%E5%88%9D%E5%A7%8B%E5%8C%96-master-%E8%8A%82%E7%82%B9

安装时出现

error execution phase preflight: couldn't validate the identity of the API Server: Get "https://apiserver.demo:6443/api/v1/namespaces/kube-public/configmaps/cluster-info?timeout=10s": x509: certificate has expired or is not yet valid: current time 2021-07-20T00:55:51-04:00 is before 2021-07-20T12:17:37Z
To see the stack trace of this error execute with --v=5 or higher

错误代码
x509: certificate has expired or is not yet valid: current time 2021-07-20T00:55:51-04:00 is before 2021-07-20T12:17:37Z

解决,是因为master节点与work节点的时间不一致导致,故同步时间即可
centos 8 同步时间:https://blog.csdn.net/baozi_xiaoge/article/details/103823996

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