创建完集群后，过一阵再加入时遇到报错如下：
error execution phase preflight: couldn't validate the identity of the API Server: could not find a JWS signature in the cluster-info ConfigMap for token IDtoken过期导致，创建一个新的即可，master：
kubeadm token create --print-join-command参考：https://stackoverflow.com/questions/61352209/kubernetes-unable-to-join-a-remote-master-node