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

[lijingcsu]

按照教程，先运行master，然后按照提示处理admin.conf，然后在另一台机器上运行node，在node机器上
[root@bigbangtest1st] /etc/kubernetes/manifests$ kubeadm join --token 863f67.19babbff7bfe8543 172.18.0.16:6443 --skip-preflight-checks
[kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters.
[preflight] Skipping pre-flight checks
[discovery] Trying to connect to API Server "172.18.0.16:6443"
[discovery] Created cluster-info discovery client, requesting info from "https://172.18.0.16:6443"
[discovery] Cluster info signature and contents are valid, will use API Server "https://172.18.0.16:6443"
[discovery] Successfully established connection with API Server "172.18.0.16:6443"
[bootstrap] Detected server version: v1.7.2
[bootstrap] The server supports the Certificates API (certificates.k8s.io/v1beta1)
[csr] Created API client to obtain unique certificate for this node, generating keys and certificate signing request
[csr] Received signed certificate from the API server, generating KubeConfig...
[kubeconfig] Wrote KubeConfig file to disk: "/etc/kubernetes/kubelet.conf"

Node join complete:

• Certificate signing request sent to master and response
  received.
• Kubelet informed of new secure connection details.

Run 'kubectl get nodes' on the master to see this machine join.

[zhuchuangang]

@lijingcsu 默认情况下，kubectl命令只能在master节点可以正常使用，因为master节点有$HOME/.kube/config配置，kubectl访问api-server的配置都在$HOME/.kube/config里面，包括api-server的地址、证书等等，如果想再其他节点也可以使用kubectl命令，需要将$HOME/.kube/config复制到其他节点

[lijingcsu]

@zhuchuangang 嗯！关键问题是我在master节点上get node也只不能获取其它节点，只能看到master节点

[zhuchuangang]

@lijingcsu node没有加入集群是吧，之前好像有同学遇到过，不过大部分跑这个脚本都是没问题的。明天再验证一下。如果用生产环境，最好选择kuberspay安装，kubeadm目前还是beta版本，网络这块还有些问题，可能有些组件没有不能正常运行。