一、报无法访问8080端口

问题：

[root@hn-chenzhousjzx-sx-bkl-0001 ~]# kubectl get nodes
The connection to the server localhost:8080 was refused - did you specify the right host or port?

解决方案：
1.master服务器的/etc/kubernetes/manifests/kube-apiserver.yaml
将insecure-port=0改成insecure-port=8080

2.重启kube-apiserver

$ sudo docker ps |grep 'kube-apiserver'
603d90351617        06924f18fe15                                  "kube-apiserver --..."   5 minutes ago       Up 5 minutes                            k8s_kube-apiserver_kube-apiserver-kube-node1_kube-system_6a57a51e24c908ce9bda1e57855173b0_7
$ docker restart 603d90351617

二、重启机器后，kubelet启动不起来(错误号255)

journalctl -xefu kubelet 可以查看具体异常点