现象描述
K8s集群初始化成功后，kubectl get nodes 查看节点信息时报错：

报错信息：

    The connection to the server localhost:8080 was refused - did you specify the right host or port?

解决办法：
执行以下命令

[root@slave1 ~]# kubectl get pod,svc
The connection to the server localhost:8080 was refused - did you specify the right host or port?
[root@slave1 ~]# mkdir -p $HOME/.kube
[root@slave1 ~]# cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
[root@slave1 ~]# echo "export KUBECONFIG=/etc/kubernetes/admin.conf" >> ~/.bash_profile
[root@slave1 ~]# source ~/.bash_profile
[root@slave1 ~]# chown $(id -u):$(id -g) $HOME/.kube/config
[root@slave1 ~]# kubectl get pod
NAME                     READY   STATUS    RESTARTS   AGE
nginx-6867cdf567-966sx   1/1     Running   0          15m