kubectl报错 error: You must be logged in to the server (Unauthorized)

kubectl报错

[root@master03 ~]# kubectl get pod 
error: You must be logged in to the server (Unauthorized)

解决办法：

[root@master03 ~]# sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
cp: overwrite '/root/.kube/config'? y
[root@master03 ~]# kubectl get pod 
No resources found in default namespace.