k8s (二十五) --- kubernetes Helm之使用helm部署ingress-nginx

灰太狼 2023-03-13 11:47 512阅读 0赞

### kubernetes Helm之使用helm部署ingress-nginx ###

*  一、部署
 *  二、测试
 *  三、部署加密访问

部署前将之前部署的ingress-nginx删除：

[root@server1 helm]# kubectl delete namespaces ingress-nginx 
    namespace "ingress-nginx" deleted
    [root@server1 nginx-ingress]# kubectl get ingress
    \NAME              CLASS    HOSTS             ADDRESS          PORTS   AGE
    rewrite-example   <none>   www1.westos.org   10.109.140.206   80      17d
    [root@server1 nginx-ingress]# kubectl delete ingress rewrite-example
    ingress.extensions "rewrite-example" deleted

# 一、部署 #

拉取并解压部署文件：

[root@server1 helm]# helm search repo nginx-ingress
    NAME                	CHART VERSION	APP VERSION	DESCRIPTION                                       
    stable/nginx-ingress	1.36.3       	0.30.0     	An nginx Ingress controller that uses ConfigMap...
    stable/nginx-lego   	0.3.1        	           	Chart for nginx-ingress-controller and kube-lego  
    [root@server1 helm]# helm pull stable/nginx-ingress
    [root@server1 helm]# ls
    mychart  nfs-client-provisioner  nfs-client-provisioner-1.2.8.tgz  nginx-ingress-1.36.3.tgz  pvc.yaml
    [root@server1 helm]# tar zxf nginx-ingress-1.36.3.tgz
    ......
    [root@server1 helm]# ls
    mychart  nfs-client-provisioner  nfs-client-provisioner-1.2.8.tgz  nginx-ingress  nginx-ingress-1.36.3.tgz  pvc.yaml
    [root@server1 helm]# cd nginx-ingress/
    [root@server1 nginx-ingress]# ls
    Chart.yaml  ci  OWNERS  README.md  templates  values.yaml

更改变量文件：

[root@server1 nginx-ingress]# vim values.yaml

镜像及标签：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70]确保仓库中有该镜像。

使用主机网络：  
![在这里插入图片描述][20200513124053681.png]daemoSet使用主机端口打开：  
![在这里插入图片描述][20200513124133707.png]更改控制器类型为DaemoSet：  
![在这里插入图片描述][20200513124245910.png]指定节点选择规则：  
![在这里插入图片描述][20200513124330459.png]  
其中`ingress: nginx`为节点标签需要给及节点添加（可以编辑文件之后添加）：  
![在这里插入图片描述][20200513124709101.png]由于我们使用的是hostnetwork的方式，因此不创建service：

![在这里插入图片描述][20200513124958318.png]  
定义deafultBackend：

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70 1]需熬镜像：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70 2]其他的选项我们不做更改。

创建独立的namespace：

[root@server1 nginx-ingress]# kubectl create namespace nginx-ingress
    namespace/nginx-ingress created

安装：

[root@server1 nginx-ingress]# helm -n nginx-ingress install nginx-ingress .
    NAME: nginx-ingress
    LAST DEPLOYED: Wed May 13 01:19:18 2020
    NAMESPACE: nginx-ingress
    STATUS: deployed
    REVISION: 1
    TEST SUITE: None
    NOTES:
    The nginx-ingress controller has been installed.
    ......

查看：

[root@server1 nginx-ingress]# helm -n nginx-ingress list
    NAME         	NAMESPACE    	REVISION	UPDATED                                	STATUS  	CHART               	APP VERSION
    nginx-ingress	nginx-ingress	1       	2020-05-13 01:19:18.580042874 +0800 CST	deployed	nginx-ingress-1.36.3	0.30.0

部署完成。

# 二、测试 #

定义deployment控制器：

[root@server1 nginx-ingress]# vim deployment.yaml 
    [root@server1 nginx-ingress]# cat deployment.yaml 
    apiVersion: apps/v1
    kind: Deployment
    metadata:
      name: deployment-nginx
      labels:
        app: nginx
    spec:
      replicas: 2
      selector:
        matchLabels:
          app: nginx
      template:
        metadata:
          labels:
            app: nginx
        spec:
          containers:
          - name: nginx
            image: myapp:v1
            ports:
            - containerPort: 80
    
    [root@server1 nginx-ingress]# kubectl apply -f deployment.yaml 
    deployment.apps/deployment-nginx created
    [root@server1 nginx-ingress]# kubectl get pod --show-labels 
    NAME                                READY   STATUS    RESTARTS   AGE   LABELS
    deployment-nginx-5c58fb7c46-6fws2   1/1     Running   0          18s   app=nginx,pod-template-hash=5c58fb7c46
    deployment-nginx-5c58fb7c46-r924f   1/1     Running   0          18s   app=nginx,pod-template-hash=5c58fb7c46

创建名为myservice的service：

[root@server1 nginx-ingress]# vim service.yaml 
    [root@server1 nginx-ingress]# cat service.yaml 
    apiVersion: v1
    kind: Service
    metadata:
      name: myservice
    spec:
      ports:
        - protocol: TCP
          port: 80
          targetPort: 80
      selector:
        app: nginx
      type: ClusterIP
    
    [root@server1 nginx-ingress]# kubectl apply -f service.yaml 
    service/myservice created
    [root@server1 nginx-ingress]# kubectl get svc
    NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
    kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP   25d
    myservice    ClusterIP   10.110.156.252   <none>        80/TCP    11s

可以看到该service有两个endpoint：

[root@server1 nginx-ingress]# kubectl describe svc myservice 
    Name:              myservice
    Namespace:         default
    Labels:            <none>
    Annotations:       Selector:  app=nginx
    Type:              ClusterIP
    IP:                10.110.156.252
    Port:              <unset>  80/TCP
    TargetPort:        80/TCP
    Endpoints:         10.244.1.135:80,10.244.2.115:80
    Session Affinity:  None
    Events:            <none>

创建ingress：

[root@server1 nginx-ingress]# vim ingress1.yaml 
    [root@server1 nginx-ingress]# cat ingress1.yaml 
    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
      annotations:
        kubernetes.io/ingress.class: nginx
      name: example
    # namespace: 
    spec:
      rules:
        - host: www1.westos.org
          http:
            paths:
              - backend:
                  serviceName: myservice			#上面定义的service的名称
                  servicePort: 80
                path: /
    
    [root@server1 nginx-ingress]# kubectl apply -f ingress1.yaml
    ingress.extensions/example created

查看创建的ingress的详细信息：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70 3]在浏览器访问（需要做www1.westos.org的解析）：  
![在这里插入图片描述][20200513130847686.png]  
可以正常访问，后端也可正常负载：

[root@foundation63 ~]# curl www1.westos.org
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation63 ~]# curl www1.westos.org/hostname.html
    deployment-nginx-5c58fb7c46-6fws2
    [root@foundation63 ~]# curl www1.westos.org/hostname.html
    deployment-nginx-5c58fb7c46-r924f

# 三、部署加密访问 #

我们之前已经创建过tls的secret：

[root@server1 nginx-ingress]# kubectl get secrets 
    NAME                  TYPE                                  DATA   AGE
    1-secret              Opaque                                2      14d
    basic-auth            Opaque                                1      17d
    default-token-25448   kubernetes.io/service-account-token   3      25d
    my-secret             Opaque                                2      14d
    myregistrykey         kubernetes.io/dockerconfigjson        1      13d
    mysecret              Opaque                                2      14d
    test-token-mjhwb      kubernetes.io/service-account-token   3      4d4h
    tls-secret            kubernetes.io/tls                     2      17d

其中的tls-secret可以直接使用：

[root@server1 nginx-ingress]# vim ingress1.yaml 
    [root@server1 nginx-ingress]# cat ingress1.yaml 
    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
      annotations:
        kubernetes.io/ingress.class: nginx
      name: example
    # namespace: 
    spec:
      rules:
        - host: www1.westos.org
          http:
            paths:
              - backend:
                  serviceName: myservice
                  servicePort: 80
                path: /
      tls:
        - hosts:
            - www1.westos.org
          secretName: tls-secret
    
    [root@server1 nginx-ingress]# kubectl apply -f ingress1.yaml 
    ingress.extensions/example configured

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70 4]

在浏览器访问`https://www1.westos.org`:

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1ODg3NTQ2_size_16_color_FFFFFF_t_70 5]高级—>接受风险：  
![在这里插入图片描述][2020051313132482.png]同样可以访问到。  
当访问没有定义的地址时会返回404.

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[20200513124245910.png]: https://img-blog.csdnimg.cn/20200513124245910.png
[20200513124330459.png]: https://img-blog.csdnimg.cn/20200513124330459.png
[20200513124709101.png]: https://img-blog.csdnimg.cn/20200513124709101.png
[20200513124958318.png]: https://img-blog.csdnimg.cn/20200513124958318.png
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[2020051313132482.png]: https://img-blog.csdnimg.cn/2020051313132482.png