Kubernetes-kubectl The connection to the server localhost:8080 was refused -did you specify

今天在Kubernetes的从节点上运行命令【kubectl】出现了如下错误：

[root@k8snode1 kubernetes]# kubectl get pod The connection to the server localhost:8080 was refused - did you specify the right host or port?

出现这个问题的原因是kubectl命令需要使用kubernetes-admin来运行，解决方法如下，将主节点中的【/etc/kubernetes/admin.conf】文件拷贝到从节点相同目录下，然后如提示配置环境变量：

Your Kubernetes control-plane has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

mkdir -p $HOME/.kube
sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
sudo chown $(id -u):$(id -g) $HOME/.kube/config
也可以简单方法

echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile

source ~/.bash_profile
接着再运行kubectl命令就OK了

[root@172-19-102-78 ~]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health":"true"}