搭建kubernetes1.20报错解决：Unable to connect to the server: x509

当我搭建好kubernetes1.20后重启虚拟机，查看node状态

kubectl get nodes

报错：Unable to connect to the server: x509: certificate signed by unknown authority (possibly because of "crypto/rsa: verification error" while trying to verify candidate authority certificate "kubernetes")

开始查看了一些资料，显示是缓冲区问题等等，都没有解决，我查看了docker和kubelet的状态，都是正常运行，执行了安装的过程，前面都没有问题，也参考了相关资料执行kubeadm reset命令清除集群所有的配置，但是也没有解决问题，最后参考kub