k8s 编写nginx资源文件

通过explain定义deployment类型的控制器跑一个nginx的pod，要做端口映射，要能够在宿主机外面访问

慕霜ヾ

804人浏览 · 2022-09-09 11:11:21

慕霜ヾ · 2022-09-09 11:11:21 发布

k8s 编写nginx资源文件

文章目录

- k8s 编写nginx资源文件

1. 要求

通过explain定义deployment类型的控制器跑一个nginx的pod，要做端口映射，要能够在宿主机外面访问

2. 编写用一个资源文件用来运行nginx pod

[root@k8s-master manifest]# vim nginx-pod.yml 
[root@k8s-master manifest]# kubectl apply -f nginx-pod.yml 
deployment.apps/nginx-pod created
[root@k8s-master manifest]# cat nginx-pod.yml 
apiVersion: apps/v1
kind: Deployment
metadata:
  labels: 
    abb: mushuang
    app: test
  name: nginx-pod
  namespace: dev
spec:
  replicas: 3
  selector: 
    matchLabels:
      app: nginxlab
  template: 
    metadata:
      labels:
        app: nginxlab
      name: containerlab
      namespace: dev
    spec:
      containers: 
      - name: nginx 
        image: nginx:latest
        imagePullPolicy: IfNotPresent
[root@k8s-master manifest]# 

[root@k8s-master manifest]# kubectl get -f nginx-pod.yml 
NAME        READY   UP-TO-DATE   AVAILABLE   AGE
nginx-pod   3/3     3            3           34s
[root@k8s-master manifest]# kubectl get pods -n dev 
NAME                         READY   STATUS    RESTARTS   AGE
nginx-pod-5c7b58d6bb-bltl9   1/1     Running   0          44s
nginx-pod-5c7b58d6bb-p5hwr   1/1     Running   0          44s
nginx-pod-5c7b58d6bb-rlzn4   1/1     Running   0          44s
[root@k8s-master manifest]#

3. 创建service

[root@k8s-master ~]# kubectl get svc
NAME         TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   2d21h
[root@k8s-master ~]# kubectl get pods -n dev
NAME                         READY   STATUS    RESTARTS   AGE
nginx-pod-5c7b58d6bb-bltl9   1/1     Running   0          2m43s
nginx-pod-5c7b58d6bb-p5hwr   1/1     Running   0          2m43s
nginx-pod-5c7b58d6bb-rlzn4   1/1     Running   0          2m43s
[root@k8s-master ~]# 

    
[root@k8s-master manifest]# cat nginx-svc.yml
apiVersion: v1
kind: Service
metadata:
  labels:
    app: nginxlab
  name: containerlab
  namespace: dev
spec:
  ports:
  - name: svcport
    port: 80
    targetPort: 80
    protocol: TCP 
  selector: 
    app: nginxlab
  type: NodePort
[root@k8s-master manifest]# 

    
[root@k8s-master manifest]# kubectl apply -f nginx-svc.yml 
service/containerlab created

3.1 查看并在集群中访问

[root@k8s-master ~]# kubectl get pods -n dev
NAME                         READY   STATUS    RESTARTS   AGE
nginx-pod-5c7b58d6bb-bltl9   1/1     Running   0          13m
nginx-pod-5c7b58d6bb-p5hwr   1/1     Running   0          13m
nginx-pod-5c7b58d6bb-rlzn4   1/1     Running   0          13m
[root@k8s-master ~]# kubectl get pods -n dev -o wide
NAME                         READY   STATUS    RESTARTS   AGE   IP            NODE        NOMINATED NODE   READINESS GATES
nginx-pod-5c7b58d6bb-bltl9   1/1     Running   0          14m   10.244.2.39   k8s-node2   <none>           <none>
nginx-pod-5c7b58d6bb-p5hwr   1/1     Running   0          14m   10.244.1.28   k8s-node1   <none>           <none>
nginx-pod-5c7b58d6bb-rlzn4   1/1     Running   0          14m   10.244.2.40   k8s-node2   <none>           <none>
[root@k8s-master ~]# 

[root@k8s-master ~]# kubectl get svc -n dev
NAME           TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
containerlab   NodePort   10.99.32.163   <none>        80:30514/TCP   2m47s

[root@k8s-master manifest]# kubectl get -f nginx-svc.yml 
NAME           TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
containerlab   NodePort   10.99.32.163   <none>        80:30514/TCP   43s
[root@k8s-master manifest]# curl 10.99.32.163
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
html { color-scheme: light dark; }
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@k8s-master manifest]#

3.2 在浏览器中访问

http://192.168.232.128:30514/

在这里插入图片描述

3.3 查看deploy和svc标签

[root@k8s-master manifest]# kubectl get -f nginx-pod.yml 
NAME        READY   UP-TO-DATE   AVAILABLE   AGE
nginx-pod   3/3     3            3           29m
[root@k8s-master manifest]# kubectl get -f nginx-svc.yml 
NAME           TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE
containerlab   NodePort   10.99.32.163   <none>        80:30514/TCP   17m
[root@k8s-master manifest]# kubectl get -f nginx-pod.yml --show-labels
NAME        READY   UP-TO-DATE   AVAILABLE   AGE   LABELS
nginx-pod   3/3     3            3           29m   app=test
[root@k8s-master manifest]# kubectl get -f nginx-svc.yml --show-labels
NAME           TYPE       CLUSTER-IP     EXTERNAL-IP   PORT(S)        AGE   LABELS
containerlab   NodePort   10.99.32.163   <none>        80:30514/TCP   17m   app=nginxlab
[root@k8s-master manifest]#

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