kubernetes(k8s)：使用helm部署ingress-nginx

Bertha 。 2023-02-16 04:10 48阅读 0赞

部署前将之前部署的ingress-nginx删除：

[kubeadm@server1 ~]$ kubectl delete namespaces ingress-nginx    //清除之前的部署
    namespace "ingress-nginx" deleted
    [kubeadm@server1 ~]$ kubectl get ingress
    No resources found in default namespace.
    [kubeadm@server1 ~]$

### 文章目录 ###

*  1. 部署
 *  2. 测试
 *  3. 部署加密访问

# 1. 部署 #

拉取并解压部署文件：

[kubeadm@server1 ~]$ 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  
    [kubeadm@server1 ~]$

[kubeadm@server1 ~]$ cd helm
    
    [kubeadm@server1 helm]$ helm pull stable/nginx-ingress
    
    [kubeadm@server1 helm]$ tar zxf nginx-ingress-1.36.3.tgz
    
    [kubeadm@server1 helm]$ cd nginx-ingress/
    [kubeadm@server1 nginx-ingress]$ ls
    Chart.yaml  ci  OWNERS  README.md  templates  values.yaml

更改变量文件 `values.yaml`

[kubeadm@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_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzNjk2OQ_size_16_color_FFFFFF_t_70]![在这里插入图片描述][20200607200643798.png]  
使用主机网络且daemoSet使用主机端口打开：  
![在这里插入图片描述][2020060720071079.png]  
![在这里插入图片描述][20200607200717799.png]  
更改控制器类型为DaemoSet：  
![在这里插入图片描述][20200607200730481.png]  
指定节点选择规则：  
![在这里插入图片描述][20200607200743554.png]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzNjk2OQ_size_16_color_FFFFFF_t_70 1]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][20200607200847955.png]  
定义deafultBackend：  
![在这里插入图片描述][20200607200858882.png]![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzNjk2OQ_size_16_color_FFFFFF_t_70 2]修改完成。

创建独立的namespace

[kubeadm@server1 nginx-ingress]$ kubectl create namespace nginx-ingress
    namespace/nginx-ingress created
    [kubeadm@server1 nginx-ingress]$

安装部署

[kubeadm@server1 nginx-ingress]$ ls
    Chart.yaml  ci  OWNERS  README.md  templates  values.yaml
    [kubeadm@server1 nginx-ingress]$ helm -n nginx-ingress install nginx-ingress .
    NAME: nginx-ingress
    LAST DEPLOYED: Fri May 15 14:06:04 2020
    NAMESPACE: nginx-ingress
    STATUS: deployed
    REVISION: 1
    TEST SUITE: None
    NOTES:
    ......

查看：

[kubeadm@server1 nginx-ingress]$ helm -n nginx-ingress list
    NAME         	NAMESPACE    	REVISION	UPDATED                                STATUS  	CHART               	APP VERSION
    nginx-ingress	nginx-ingress	1       	2020-05-15 14:06:04.084109462 +0800 CSTdeployed	nginx-ingress-1.36.3	0.30.0     
    [kubeadm@server1 nginx-ingress]$

部署完成

# 2. 测试 #

（1）定义deployment控制器 维护pod

apiVersion: apps/v1
    kind: Deployment      //Deployment 
    metadata:
      name: deployment-nginx
      labels:
        app: nginx
    spec:
      replicas: 2       //2个pod
      selector:
        matchLabels:
          app: nginx
      template:
        metadata:
          labels:
            app: nginx      //标签
        spec:
          containers:
          - name: nginx
            image: k8s/myapp:v1
            ports:
            - containerPort: 80

[kubeadm@server1 nginx-ingress]$ vim deployment.yaml
    [kubeadm@server1 nginx-ingress]$ kubectl apply -f deployment.yaml 
    deployment.apps/deployment-nginx created
    [kubeadm@server1 nginx-ingress]$ kubectl get pod --show-labels 
    NAME                                      READY   STATUS    RESTARTS   AGE   LABELS
    deployment-nginx-77d4c6fc75-dzqh7         1/1     Running   0          18s   app=nginx,pod-template-hash=77d4c6fc75
    deployment-nginx-77d4c6fc75-k6qpz         1/1     Running   0          18s   app=nginx,pod-template-hash=77d4c6fc75
    nfs-client-provisioner-6bf974db79-kd987   1/1     Running   1          18h   app=nfs-client-provisioner,pod-template-hash=6bf974db79
    [kubeadm@server1 nginx-ingress]$

（2）创建名为`myservice`的service 关联后端的pod

apiVersion: v1
    kind: Service
    metadata:
      name: myservice
    spec:
      ports:
        - protocol: TCP
          port: 80
          targetPort: 80
      selector:
        app: nginx       //标签匹配 app=nginx
      type: ClusterIP

[kubeadm@server1 nginx-ingress]$ kubectl apply -f service.yaml
    service/myservice created
    [kubeadm@server1 nginx-ingress]$ kubectl get svc
    NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
    kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP   23d
    myservice    ClusterIP   10.103.188.143   <none>        80/TCP    4s
    [kubeadm@server1 nginx-ingress]$

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzNjk2OQ_size_16_color_FFFFFF_t_70 3]可以看到该service有两个endpoint后端：

[kubeadm@server1 nginx-ingress]$ kubectl describe svc myservice 
    Name:              myservice
    Namespace:         default
    Labels:            <none>
    Annotations:       Selector:  app=nginx
    Type:              ClusterIP
    IP:                10.103.188.143
    Port:              <unset>  80/TCP
    TargetPort:        80/TCP
    Endpoints:         10.244.1.161:80,10.244.2.93:80   //两个后端
    Session Affinity:  None 
    Events:            <none>
    [kubeadm@server1 nginx-ingress]$

（3）创建ingress （控制关联service）

[kubeadm@server1 nginx-ingress]$ cat ingress.yaml 
    apiVersion: extensions/v1beta1
    kind: Ingress
    metadata:
      annotations:
        kubernetes.io/ingress.class: nginx
      name: example
    # namespace: 
    spec:
      rules:
        - host: www1.westos.org       //网址
          http:
            paths:
              - backend:
                  serviceName: myservice     //匹配服务：myservice
                  servicePort: 80
                path: /

[kubeadm@server1 nginx-ingress]$ kubectl apply -f ingress.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_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MzkzNjk2OQ_size_16_color_FFFFFF_t_70 4]在外部访问（需要做www1.westos.org的解析）：

[root@foundation8 kiosk]# cat /etc/hosts  // server3上要有www1.westos.org的解析
    172.25.0.3 www1.westos.org www2.westos.org www3.westos.org

[root@foundation8 Downloads]# curl www1.westos.org
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]# curl www1.westos.org
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]# curl www1.westos.org
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]#

[root@foundation8 kiosk]# curl www1.westos.org/hostname.html  // 可以负载均衡
    nginx-deployment-5c58fb7c46-qmmms
    [root@foundation8 kiosk]# curl www1.westos.org/hostname.html
    nginx-deployment-5c58fb7c46-57z8g

![在这里插入图片描述][20200607201545730.png]

# 3. 部署加密访问 #

（1）生成tls密钥和证书

[kubeadm@server1 nginx-ingress]$ cd certs/
    [kubeadm@server1 certs]$ openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/CN=nginxsvc/O=nginxsvc"
    Generating a 2048 bit RSA private key
    .................................................................................................................+++
    ..................................................................................................................................................+++
    writing new private key to 'tls.key'
    -----
    [kubeadm@server1 certs]$ ls
    tls.crt  tls.key
    [kubeadm@server1 certs]$

（2）将生成的证书和key保存到secret里面：

[kubeadm@server1 certs]$ kubectl create secret tls tls-secret --key tls.key --cert tls.crt
    secret/tls-secret created
    [kubeadm@server1 certs]$ kubectl get secrets 
    NAME                                 TYPE                                  DATA   AGE
    default-token-jhnhn                  kubernetes.io/service-account-token   3      23d
    myregistry                           kubernetes.io/dockerconfigjson        1      17d
    nfs-client-provisioner-token-lq8b9   kubernetes.io/service-account-token   3      18h
    test-token-pbr8q                     kubernetes.io/service-account-token   3      10d
    tls-secret                           kubernetes.io/tls                     2      8s
    [kubeadm@server1 certs]$

（3）修改ingress文件：

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:                      //打开tls
        - hosts:
            - www1.westos.org
          secretName: tls-secret

[kubeadm@server1 nginx-ingress]$ kubectl apply -f ingress1.yaml 
    ingress.extensions/example created
    [kubeadm@server1 nginx-ingress]$

（4）在浏览器访问https://www1.westos.org  
![在这里插入图片描述][20200607201811170.png]

[root@foundation8 Downloads]# curl https://www1.westos.org -k
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]# curl https://www1.westos.org -k
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]# curl https://www1.westos.org -k
    Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
    [root@foundation8 Downloads]#

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[2020060720071079.png]: https://img-blog.csdnimg.cn/2020060720071079.png
[20200607200717799.png]: https://img-blog.csdnimg.cn/20200607200717799.png
[20200607200730481.png]: https://img-blog.csdnimg.cn/20200607200730481.png
[20200607200743554.png]: https://img-blog.csdnimg.cn/20200607200743554.png
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[20200607200858882.png]: https://img-blog.csdnimg.cn/20200607200858882.png
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[20200607201811170.png]: https://img-blog.csdnimg.cn/20200607201811170.png