部署 Nginx ：
[root@k8s-master ~]# kubectl create deployment nginx --image=nginx:1.14-alpine
deployment.apps/nginx created
暴露端口：
[root@k8s-master ~]# kubectl expose deployment nginx --port=80 --type=NodePort
service/nginx exposed
查看服务状态：
[root@k8s-master ~]# kubectl get pods,svc
NAME READY STATUS RESTARTS AGE
pod/nginx-65c4bffcb6-f9b55 1/1 Running 0 61s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 45h
service/nginx NodePort 10.96.67.225 <none> 80:31339/TCP 16s
[root@k8s-master ~]# kubectl get pod
NAME READY STATUS RESTARTS AGE
nginx-65c4bffcb6-f9b55 1/1 Running 0 3m17s
[root@k8s-master ~]# kubectl get service
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 45h
nginx NodePort 10.96.67.225 <none> 80:31339/TCP 2m39s
使用master主节点ip地址访问nginx：
使用集群IP访问：
[root@k8s-master ~]# kubectl get pods,svc
NAME READY STATUS RESTARTS AGE
pod/nginx-65c4bffcb6-f9b55 1/1 Running 0 61s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 45h
service/nginx NodePort 10.96.67.225 <none> 80:31339/TCP 16s
[root@k8s-master ~]# curl -X GET 10.96.67.225
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
自动补全：
# 安装
yum -y install bash-completion
# 自动补全
echo 'source <(kubectl completion bash)' >>~/.bashrc
kubectl completion bash >/etc/bash_completion.d/kubectl
# 全局
kubectl completion bash | sudo tee /etc/bash_completion.d/kubectl > /dev/null
source /usr/share/bash-completion/bash_completion
