k8s:kubeadm搭建k8s集群，加入新master节点报错

加入新的master节点

[root@k8s-master02 ~]#kubeadm join 172.20.1.236:16443 --token 7t2weq.bjbawausm0jaxury \
>     --discovery-token-ca-cert-hash sha256:cf30ddd3df1c6215b886df1ea378a68ad5a9faad7933d53ca9891ebbdf9a1c3f \
>     --control-plane --certificate-key 8025cc203187ad6bf23f074538cb8b9163031ae73262be556dbcb11ccc92248

出现报错，报错如下所示：

[preflight] Running pre-flight checks
[preflight] Reading configuration from the cluster...
[preflight] FYI: You can look at this config file with 'kubectl -n kube-system get cm kubeadm-config -o yaml'
[preflight] Running pre-flight checks before initializing the new control plane instance
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[download-certs] Downloading the certificates in Secret "kubeadm-certs" in the "kube-system" Namespace
error execution phase control-plane-prepare/download-certs: error downloading certs: error decoding certificate key: encoding/hex: odd length hex string
To see the stack trace of this error execute with --v=5 or higher

解决办法：

重新生成新的token

[root@k8s-master01 ~]# kubeadm token create --print-join-command
kubeadm join 172.20.1.236