k8s 的nodeport

最新推荐文章于 2025-09-28 21:09:45 发布

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本文详细介绍了如何使用Kubernetes部署Nginx服务，包括创建Deployment和Service，以及通过NodePort实现外部访问。通过实践操作，展示了从配置文件到验证访问的全过程。

1、创建deployment

[root@master ~]# cat nginx-deployment.yaml 
apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-nginx
spec:
  selector:
    matchLabels:
      run: my-nginx
  replicas: 2
  template:
    metadata:
      labels:
        run: my-nginx
    spec:
      containers:
      - name: my-nginx
        image: nginx
        ports:
        - containerPort: 80

kubectl create -f nginx-deployment.yaml

2、创建service

[root@master ~]# cat nginx-svc.yaml 
apiVersion: v1
kind: Service
metadata:
  name: my-nginx
  labels: 
   name: my-nginx
spec:
  type: NodePort
  ports:
  - port: 80
    protocol: TCP
    targetPort: 80
    name: http
    nodePort: 30088
  selector:
    run: my-nginx

kubectl create -f nginx-svc.yaml
3、查看pod和svc

[root@master ~]# kubectl get po -o wide
NAME                        READY   STATUS             RESTARTS   AGE    IP            NODE     NOMINATED NODE   READINESS GATES
busybox1                    4/4     Running            0          32d    10.244.1.14   node1    <none>           <none>
my-nginx-75897978cd-p6p79   1/1     Running            0          2d2h   10.244.1.25   node1    <none>           <none>
my-nginx-75897978cd-z67ch   1/1     Running            0          2d2h   10.244.0.9    master   <none>           <none>
mypod                       1/1     Running            0          39d    10.244.1.10   node1    <none>           <none>
test-pod                    1/2     CrashLoopBackOff   571        2d1h   10.244.1.30   node1    <none>           <none>
volume-pod                  2/2     Running            0          25h    10.244.1.31   node1    <none>           <none>
[root@master ~]# kubectl get svc
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)        AGE
kubernetes   ClusterIP   10.1.0.1     <none>        443/TCP        42d
my-nginx     NodePort    10.1.35.73   <none>        80:30088/TCP   6m2s

4、主机ip是10.0.0.4，验证下能否访问，修改了一台nginx的首页

[root@master ~]# curl 10.0.0.4:30088
<!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>
[root@master ~]# curl 10.0.0.4:30088
hello