部署你的第一个应用程序到k8s集群

看到这里,求知欲饥渴难耐的你一定在想,怎么部署的我们应用程序到集群里面去呢?来个简单的,只需要两步:(这里本文使用nginx镜像当我们的应用程序,因为nginx 简单,运行起来后直接可以用浏览器访问网页了。)

第一步:在master 节点上创建一个deployment

kubectl create deployment nginx --image=nginx

效果如下,可以看到一个叫nginx的deployment创建成功了。

root@ubuntu:/home/cong# kubectl create deployment nginx --image=nginx
deployment.apps/nginx created
 
root@ubuntu:/home/cong# kubectl get deployments
NAME      DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
nginx     1         1         1            1           11m

第二步:创建一个service

kubectl create service nodeport nginx --tcp 80:80

效果如下,可以看到一个叫nginx的service创建成功了,这里kubectl get svc是kubectl get services的简写。

root@ubuntu:/home/cong# kubectl create service nodeport nginx --tcp 80:80
service/nginx created
 
root@ubuntu:/home/cong# kubectl get svc
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP        3d
nginx        NodePort    10.107.237.157   <none>        80:30601/TCP   11s

在slave节点上执行下面的命令验证一下nginx有没有部署成功。

curl localhost:30601

或者

curl kube-slave:30601

效果如下:

root@ubuntu:/home/cong# curl localhost:30601
<!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>

用浏览器打开试试,nginx的首页显示出来了。

简单吧,是不是信心大增了?!

为了练习更多复杂的命令,我们将上面建好的deployments/nginx, services/nginx 删除先,命令如下:

root@ubuntu:/home/cong# kubectl delete deployments/nginx services/nginx
deployment.extensions "nginx" deleted
service "nginx" deleted

好了,你应用程序部署的处女作就完美结束了

作者:wucong60
来源:CSDN
原文:https://blog.csdn.net/wucong60/article/details/81458409
版权声明:本文为博主原创文章,转载请附上博文链接!

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