Kubernetes K8S 1.20部署Ingress nginx 0.30

桃扇骨 2022-12-29 12:51 178阅读 0赞

# 主机配置规划 #

<table> 
 <thead> 
  <tr> 
   <th>服务器名称(hostname)</th> 
   <th>系统版本</th> 
   <th>配置</th> 
   <th>内网IP</th> 
   <th>外网IP(模拟)</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>k8s-master</td> 
   <td>CentOS7.7</td> 
   <td>2C/4G/20G</td> 
   <td>172.16.1.110</td> 
   <td>10.0.0.110</td> 
  </tr> 
  <tr> 
   <td>k8s-node01</td> 
   <td>CentOS7.7</td> 
   <td>2C/4G/20G</td> 
   <td>172.16.1.111</td> 
   <td>10.0.0.111</td> 
  </tr> 
  <tr> 
   <td>k8s-node02</td> 
   <td>CentOS7.7</td> 
   <td>2C/4G/20G</td> 
   <td>172.16.1.112</td> 
   <td>10.0.0.112</td> 
  </tr> 
 </tbody> 
</table>

# Ingress概述 #

Ingress 是对集群中服务的外部访问进行管理的 API 对象，典型的访问方式是 HTTP和HTTPS。

Ingress 可以提供负载均衡、SSL 和基于名称的虚拟托管。

必须具有 ingress 控制器【例如 ingress-nginx】才能满足 Ingress 的要求。仅创建 Ingress 资源无效。

## Ingress 是什么 ##

Ingress 公开了从集群外部到集群内 services 的 HTTP 和 HTTPS 路由。 流量路由由 Ingress 资源上定义的规则控制。

1  internet
    2      |
    3 [ Ingress ]
    4 --|-----|--
    5 [ Services ]

可以将 Ingress 配置为提供服务外部可访问的 URL、负载均衡流量、 SSL / TLS，以及提供基于名称的虚拟主机。Ingress 控制器 通常负责通过负载均衡器来实现 Ingress，尽管它也可以配置边缘路由器或其他前端来帮助处理流量。

Ingress 不会公开任意端口或协议。若将 HTTP 和 HTTPS 以外的服务公开到 Internet 时，通常使用 Service.Type=NodePort 或者 Service.Type=LoadBalancer 类型的服务。

以Nginx Ingress为例，图如下

![5d393aed9aa4762e6ce5a4ef9caf85e9.png][]

![5c4195de35df7bf0950f46264a14d838.png][]

# Ingress示例 #

## 架构图 ##

![d96450bfacb8bf069a15cf129b0dffec.png][]

## 部署Ingress-Nginx ##

该Nginx是经过改造的，而不是传统的Nginx。

Ingress-Nginx官网地址

https://kubernetes.github.io/ingress-nginx/

Ingress-Nginx GitHub地址

https://github.com/kubernetes/ingress-nginx

本次下载版本：nginx-0.30.0

![59a93043569348641ca7d39f62a626ad.png][]

镜像下载与重命名

1 docker pull registry.cn-beijing.aliyuncs.com/google_registry/nginx-ingress-controller:0.30.0
    2 docker tag 89ccad40ce8e quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0
    3 docker rmi  registry.cn-beijing.aliyuncs.com/google_registry/nginx-ingress-controller:0.30.0

ingress-nginx的yaml文件修改后并启动

1 # 当前目录
     2 [root@k8s-master ingress]# pwd
     3 /root/k8s_practice/ingress
     4 # 获取NGINX: 0.30.0
     5 [root@k8s-master ingress]# wget https://github.com/kubernetes/ingress-nginx/archive/nginx-0.30.0.tar.gz
     6 [root@k8s-master ingress]# tar xf nginx-0.30.0.tar.gz
     7 # yaml文件在下载包中的位置：ingress-nginx-nginx-0.30.0/deploy/static/mandatory.yaml
     8 [root@k8s-master ingress]# cp -a ingress-nginx-nginx-0.30.0/deploy/static/mandatory.yaml ./
     9 [root@k8s-master ingress]# 
    10 # yaml文件配置修改
    11 [root@k8s-master ingress]# vim mandatory.yaml
    12 ………………
    13 apiVersion: apps/v1
    14 kind: DaemonSet   # 从Deployment改为DaemonSet
    15 metadata:
    16   name: nginx-ingress-controller
    17   namespace: ingress-nginx
    18   labels:
    19     app.kubernetes.io/name: ingress-nginx
    20     app.kubernetes.io/part-of: ingress-nginx
    21 spec:
    22   #replicas: 1   # 注释掉
    23 ………………
    24       nodeSelector:
    25         kubernetes.io/hostname: k8s-master   # 修改处
    26       # 如下几行为新加行  作用【允许在master节点运行】
    27       tolerations:
    28       - key: node-role.kubernetes.io/master
    29         effect: NoSchedule
    30 ………………
    31           ports:
    32             - name: http
    33               containerPort: 80
    34               hostPort: 80    # 添加处【可在宿主机通过该端口访问Pod】
    35               protocol: TCP
    36             - name: https
    37               containerPort: 443
    38               hostPort: 443   # 添加处【可在宿主机通过该端口访问Pod】
    39               protocol: TCP
    40 ………………
    41 [root@k8s-master ingress]# 
    42 [root@k8s-master ingress]# kubectl apply -f mandatory.yaml
    43 namespace/ingress-nginx created
    44 configmap/nginx-configuration created
    45 configmap/tcp-services created
    46 configmap/udp-services created
    47 serviceaccount/nginx-ingress-serviceaccount created
    48 clusterrole.rbac.authorization.k8s.io/nginx-ingress-clusterrole created
    49 role.rbac.authorization.k8s.io/nginx-ingress-role created
    50 rolebinding.rbac.authorization.k8s.io/nginx-ingress-role-nisa-binding created
    51 clusterrolebinding.rbac.authorization.k8s.io/nginx-ingress-clusterrole-nisa-binding created
    52 daemonset.apps/nginx-ingress-controller created
    53 limitrange/ingress-nginx created
    54 [root@k8s-master ingress]# 
    55 [root@k8s-master ingress]# kubectl get ds -n ingress-nginx -o wide
    56 NAME                       DESIRED   CURRENT   READY   UP-TO-DATE   AVAILABLE   NODE SELECTOR                       AGE     CONTAINERS                 IMAGES                                                                  SELECTOR
    57 nginx-ingress-controller   1         1         1       1            1           kubernetes.io/hostname=k8s-master   9m47s   nginx-ingress-controller   quay.io/kubernetes-ingress-controller/nginx-ingress-controller:0.30.0   app.kubernetes.io/name=ingress-nginx,app.kubernetes.io/part-of=ingress-nginx
    58 [root@k8s-master ingress]# 
    59 [root@k8s-master ingress]# kubectl get pod -n ingress-nginx -o wide
    60 NAME                             READY   STATUS    RESTARTS   AGE     IP            NODE         NOMINATED NODE   READINESS GATES
    61 nginx-ingress-controller-rrbh9   1/1     Running   0          9m55s   10.244.0.46   k8s-master   <none>           <none>

## deply\_service1的yaml信息 ##

yaml文件

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat deply_service1.yaml 
     4 apiVersion: apps/v1
     5 kind: Deployment
     6 metadata:
     7   name: myapp-deploy1
     8   namespace: default
     9 spec:
    10   replicas: 3
    11   selector:
    12     matchLabels:
    13       app: myapp
    14       release: v1
    15   template:
    16     metadata:
    17       labels:
    18         app: myapp
    19         release: v1
    20         env: test
    21     spec:
    22       containers:
    23       - name: myapp
    24         image: registry.cn-beijing.aliyuncs.com/google_registry/myapp:v1
    25         imagePullPolicy: IfNotPresent
    26         ports:
    27         - name: http
    28           containerPort: 80
    29 ---
    30 apiVersion: v1
    31 kind: Service
    32 metadata:
    33   name: myapp-clusterip1
    34   namespace: default
    35 spec:
    36   type: ClusterIP  # 默认类型
    37   selector:
    38     app: myapp
    39     release: v1
    40   ports:
    41   - name: http
    42     port: 80
    43     targetPort: 80

启动Deployment和Service

1 [root@k8s-master ingress]# kubectl apply -f deply_service1.yaml 
    2 deployment.apps/myapp-deploy1 created
    3 service/myapp-clusterip1 created

查看Deploy状态和信息

1 [root@k8s-master ingress]# kubectl get deploy -o wide
     2 NAME            READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES                                                      SELECTOR
     3 myapp-deploy1   3/3     3            3           28s   myapp        registry.cn-beijing.aliyuncs.com/google_registry/myapp:v1   app=myapp,release=v1
     4 [root@k8s-master ingress]# 
     5 [root@k8s-master ingress]# kubectl get rs -o wide
     6 NAME                       DESIRED   CURRENT   READY   AGE   CONTAINERS   IMAGES                                                      SELECTOR
     7 myapp-deploy1-5695bb5658   3         3         3       30s   myapp        registry.cn-beijing.aliyuncs.com/google_registry/myapp:v1   app=myapp,pod-template-hash=5695bb5658,release=v1
     8 [root@k8s-master ingress]# 
     9 [root@k8s-master ingress]# kubectl get pod -o wide --show-labels
    10 NAME                             READY   STATUS    RESTARTS   AGE   IP             NODE         NOMINATED NODE   READINESS GATES   LABELS
    11 myapp-deploy1-5695bb5658-n6548   1/1     Running   0          36s   10.244.2.144   k8s-node02   <none>           <none>            app=myapp,env=test,pod-template-hash=5695bb5658,release=v1
    12 myapp-deploy1-5695bb5658-rqcpb   1/1     Running   0          36s   10.244.2.143   k8s-node02   <none>           <none>            app=myapp,env=test,pod-template-hash=5695bb5658,release=v1
    13 myapp-deploy1-5695bb5658-vv6gm   1/1     Running   0          36s   10.244.3.200   k8s-node01   <none>           <none>            app=myapp,env=test,pod-template-hash=5695bb5658,release=v1

curl访问pod

1 [root@k8s-master ingress]# curl 10.244.2.144
     2 Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
     3 [root@k8s-master ingress]# 
     4 [root@k8s-master ingress]# curl 10.244.2.144/hostname.html
     5 myapp-deploy1-5695bb5658-n6548
     6 [root@k8s-master ingress]# 
     7 [root@k8s-master ingress]# curl 10.244.2.143/hostname.html
     8 myapp-deploy1-5695bb5658-rqcpb
     9 [root@k8s-master ingress]# 
    10 [root@k8s-master ingress]# curl 10.244.3.200/hostname.html
    11 myapp-deploy1-5695bb5658-vv6gm

查看Service状态和信息

1 [root@k8s-master ingress]# kubectl get svc -o wide
    2 NAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE     SELECTOR
    3 kubernetes         ClusterIP   10.96.0.1       <none>        443/TCP   19d     <none>
    4 myapp-clusterip1   ClusterIP   10.104.146.14   <none>        80/TCP    5m38s   app=myapp,release=v1

curl访问svc

1 [root@k8s-master ingress]# curl 10.104.146.14
     2 Hello MyApp | Version: v1 | <a href="hostname.html">Pod Name</a>
     3 [root@k8s-master ingress]# 
     4 [root@k8s-master ingress]# curl 10.104.146.14/hostname.html
     5 myapp-deploy1-5695bb5658-n6548
     6 [root@k8s-master ingress]# 
     7 [root@k8s-master ingress]# curl 10.104.146.14/hostname.html
     8 myapp-deploy1-5695bb5658-vv6gm
     9 [root@k8s-master ingress]# 
    10 [root@k8s-master ingress]# curl 10.104.146.14/hostname.html
    11 myapp-deploy1-5695bb5658-rqcpb

## deply\_service2的yaml信息 ##

yaml文件

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat deply_service2.yaml 
     4 apiVersion: apps/v1
     5 kind: Deployment
     6 metadata:
     7   name: myapp-deploy2
     8   namespace: default
     9 spec:
    10   replicas: 3
    11   selector:
    12     matchLabels:
    13       app: myapp
    14       release: v2
    15   template:
    16     metadata:
    17       labels:
    18         app: myapp
    19         release: v2
    20         env: test
    21     spec:
    22       containers:
    23       - name: myapp
    24         image: registry.cn-beijing.aliyuncs.com/google_registry/myapp:v2
    25         imagePullPolicy: IfNotPresent
    26         ports:
    27         - name: http
    28           containerPort: 80
    29 ---
    30 apiVersion: v1
    31 kind: Service
    32 metadata:
    33   name: myapp-clusterip2
    34   namespace: default
    35 spec:
    36   type: ClusterIP  # 默认类型
    37   selector:
    38     app: myapp
    39     release: v2
    40   ports:
    41   - name: http
    42     port: 80
    43     targetPort: 80

启动Deployment和Service

1 [root@k8s-master ingress]# kubectl apply -f deply_service2.yaml 
    2 deployment.apps/myapp-deploy2 created
    3 service/myapp-clusterip2 created

查看Deploy状态和信息

1 [root@k8s-master ingress]# kubectl get deploy myapp-deploy2 -o wide
     2 NAME            READY   UP-TO-DATE   AVAILABLE   AGE   CONTAINERS   IMAGES                                                      SELECTOR
     3 myapp-deploy2   3/3     3            3           9s    myapp        registry.cn-beijing.aliyuncs.com/google_registry/myapp:v2   app=myapp,release=v2
     4 [root@k8s-master ingress]# 
     5 [root@k8s-master ingress]# kubectl get rs  -o wide
     6 NAME                       DESIRED   CURRENT   READY   AGE     CONTAINERS   IMAGES                                                      SELECTOR
     7 myapp-deploy1-5695bb5658   3         3         3       7m23s   myapp        registry.cn-beijing.aliyuncs.com/google_registry/myapp:v1   app=myapp,pod-template-hash=5695bb5658,release=v1   # 之前创建的
     8 myapp-deploy2-54f48f879b   3         3         3       15s     myapp        registry.cn-beijing.aliyuncs.com/google_registry/myapp:v2   app=myapp,pod-template-hash=54f48f879b,release=v2   # 当前deploy创建的
     9 [root@k8s-master ingress]# 
    10 [root@k8s-master ingress]# kubectl get pod -o wide --show-labels -l "release=v2"
    11 NAME                             READY   STATUS    RESTARTS   AGE   IP             NODE         NOMINATED NODE   READINESS GATES   LABELS
    12 myapp-deploy2-54f48f879b-7pxwp   1/1     Running   0          25s   10.244.3.201   k8s-node01   <none>           <none>            app=myapp,env=test,pod-template-hash=54f48f879b,release=v2
    13 myapp-deploy2-54f48f879b-lqlh2   1/1     Running   0          25s   10.244.2.146   k8s-node02   <none>           <none>            app=myapp,env=test,pod-template-hash=54f48f879b,release=v2
    14 myapp-deploy2-54f48f879b-pfvnn   1/1     Running   0          25s   10.244.2.145   k8s-node02   <none>           <none>            app=myapp,env=test,pod-template-hash=54f48f879b,release=v2

查看Service状态和信息

1 [root@k8s-master ingress]# kubectl get svc -o wide  
    2 NAME               TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)   AGE    SELECTOR
    3 kubernetes         ClusterIP   10.96.0.1       <none>        443/TCP   19d    <none>
    4 myapp-clusterip1   ClusterIP   10.104.146.14   <none>        80/TCP    8m9s   app=myapp,release=v1
    5 myapp-clusterip2   ClusterIP   10.110.181.62   <none>        80/TCP    61s    app=myapp,release=v2

curl访问svc

1 [root@k8s-master ingress]# curl 10.110.181.62
     2 Hello MyApp | Version: v2 | <a href="hostname.html">Pod Name</a>
     3 [root@k8s-master ingress]# 
     4 [root@k8s-master ingress]# curl 10.110.181.62/hostname.html
     5 myapp-deploy2-54f48f879b-lqlh2
     6 [root@k8s-master ingress]# 
     7 [root@k8s-master ingress]# curl 10.110.181.62/hostname.html
     8 myapp-deploy2-54f48f879b-7pxwp
     9 [root@k8s-master ingress]# 
    10 [root@k8s-master ingress]# curl 10.110.181.62/hostname.html
    11 myapp-deploy2-54f48f879b-pfvnn

## Ingress HTTP代理访问 ##

yaml文件【由于自建的service在默认default名称空间，因此这里也是default名称空间】

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat ingress-http.yaml
     4 apiVersion: networking.k8s.io/v1beta1
     5 kind: Ingress
     6 metadata:
     7   name: nginx-http
     8   namespace: default
     9 spec:
    10   rules:
    11     - host: www.zhangtest.com
    12       http:
    13         paths:
    14         - path: /
    15           backend:
    16             serviceName: myapp-clusterip1
    17             servicePort: 80
    18     - host: blog.zhangtest.com
    19       http:
    20         paths:
    21         - path: /
    22           backend:
    23             serviceName: myapp-clusterip2
    24             servicePort: 80

启动ingress http并查看状态

1 [root@k8s-master ingress]# kubectl apply -f ingress-http.yaml 
    2 ingress.networking.k8s.io/nginx-http created
    3 [root@k8s-master ingress]# 
    4 [root@k8s-master ingress]# kubectl get ingress -o wide
    5 NAME         HOSTS                                  ADDRESS   PORTS   AGE
    6 nginx-http   www.zhangtest.com,blog.zhangtest.com             80      9s

查看nginx配置文件

1 [root@k8s-master ~]# kubectl get pod -A | grep 'ingre'
    2 ingress-nginx          nginx-ingress-controller-rrbh9               1/1     Running   0          27m
    3 [root@k8s-master ~]# 
    4 [root@k8s-master ~]# kubectl exec -it -n ingress-nginx nginx-ingress-controller-rrbh9 bash
    5 bash-5.0$ cat /etc/nginx/nginx.conf
    6 …………
    7 ##### 可见server www.zhangtest.com 和 server blog.zhangtest.com的配置

### 浏览器访问 ###

hosts文件修改，添加如下信息

1 文件位置：C:\WINDOWS\System32\drivers\etc\hosts
    2 添加信息如下：
    3 # K8S ingress学习
    4 10.0.0.110  www.zhangtest.com  blog.zhangtest.com

浏览器访问[www.zhangtest.com][]

1 http://www.zhangtest.com/
    2 http://www.zhangtest.com/hostname.html

![a86feef4274ff350e8f3a60293fe38a8.png][]

浏览器访问blog.zhangtest.com

1 http://blog.zhangtest.com/
    2 http://blog.zhangtest.com/hostname.html

![11f755e2c41dbcc0a934593cad2c9f54.png][]

当然：除了用浏览器访问外，也可以在Linux使用curl访问。前提是修改/etc/hosts文件，对上面的两个域名进行解析。

## Ingress HTTPS代理访问 ##

### SSL证书创建 ###

1 [root@k8s-master cert]# pwd
     2 /root/k8s_practice/ingress/cert
     3 [root@k8s-master cert]# openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout tls.key -out tls.crt -subj "/C=CN/ST=BJ/L=BeiJing/O=BTC/OU=MOST/CN=zhang/emailAddress=ca@test.com"
     4 Generating a 2048 bit RSA private key
     5 ......................................................+++
     6 ........................+++
     7 writing new private key to 'tls.key'
     8 -----
     9 [root@k8s-master cert]# kubectl create secret tls tls-secret --key tls.key --cert tls.crt
    10 secret/tls-secret created

### 创建ingress https ###

yaml文件【由于自建的service在默认default名称空间，因此这里也是default名称空间】

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat ingress-https.yaml 
     4 apiVersion: networking.k8s.io/v1beta1
     5 kind: Ingress
     6 metadata:
     7   name: nginx-https
     8   namespace: default
     9 spec:
    10   tls:
    11     - hosts:
    12       - www.zhangtest.com
    13       - blog.zhangtest.com
    14       secretName: tls-secret
    15   rules:
    16     - host: www.zhangtest.com
    17       http:
    18         paths:
    19         - path: /
    20           backend:
    21             serviceName: myapp-clusterip1
    22             servicePort: 80
    23     - host: blog.zhangtest.com
    24       http:
    25         paths:
    26         - path: /
    27           backend:
    28             serviceName: myapp-clusterip2
    29             servicePort: 80

启动ingress https并查看状态

1 [root@k8s-master ingress]# kubectl apply -f ingress-https.yaml 
    2 ingress.networking.k8s.io/nginx-https created
    3 [root@k8s-master ingress]# 
    4 [root@k8s-master ingress]# kubectl get ingress -o wide
    5 NAME          HOSTS                                  ADDRESS   PORTS     AGE
    6 nginx-https   www.zhangtest.com,blog.zhangtest.com             80, 443   8s

### 浏览器访问 ###

hosts文件修改，添加如下信息

1 文件位置：C:\WINDOWS\System32\drivers\etc\hosts
    2 添加信息如下：
    3 # K8S ingress学习
    4 10.0.0.110  www.zhangtest.com  blog.zhangtest.com

浏览器访问[www.zhangtest.com][]

1 https://www.zhangtest.com/
    2 https://www.zhangtest.com/hostname.html

![f8c797af02d6e3f186d23f7531ff0941.png][]

浏览器访问blog.zhangtest.com

1 https://blog.zhangtest.com/
    2 https://blog.zhangtest.com/hostname.html

![605111232eb610be9e9f8f067b107dc2.png][]

# Ingress-Nginx实现BasicAuth认证 #

官网地址：

https://kubernetes.github.io/ingress-nginx/examples/auth/basic/

准备工作

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# yum install -y httpd
     4 [root@k8s-master ingress]# htpasswd -c auth foo
     5 New password: #输入密码
     6 Re-type new password: #重复输入的密码
     7 Adding password for user foo   ##### 此时会生成一个 auth文件
     8 [root@k8s-master ingress]# kubectl create secret generic basic-auth --from-file=auth
     9 secret/basic-auth created
    10 [root@k8s-master ingress]# 
    11 [root@k8s-master ingress]# kubectl get secret basic-auth -o yaml
    12 apiVersion: v1
    13 data:
    14   auth: Zm9vOiRhcHIxJFpaSUJUMDZOJDVNZ3hxdkpFNWVRTi9NdnZCcVpHaC4K
    15 kind: Secret
    16 metadata:
    17   creationTimestamp: "2020-08-17T09:42:04Z"
    18   name: basic-auth
    19   namespace: default
    20   resourceVersion: "775573"
    21   selfLink: /api/v1/namespaces/default/secrets/basic-auth
    22   uid: eef0853b-a52b-4684-922a-817e4cd9e9ca
    23 type: Opaque

ingress yaml文件

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat nginx_basicauth.yaml 
     4 apiVersion: networking.k8s.io/v1beta1
     5 kind: Ingress
     6 metadata:
     7   name: ingress-with-auth
     8   annotations:
     9     # type of authentication
    10     nginx.ingress.kubernetes.io/auth-type: basic
    11     # name of the secret that contains the user/password definitions
    12     nginx.ingress.kubernetes.io/auth-secret: basic-auth
    13     # message to display with an appropriate context why the authentication is required
    14     nginx.ingress.kubernetes.io/auth-realm: 'Authentication Required - foo'
    15 spec:
    16   rules:
    17   - host: auth.zhangtest.com
    18     http:
    19       paths:
    20       - path: /
    21         backend:
    22           serviceName: myapp-clusterip1
    23           servicePort: 80

启动ingress并查看状态

1 [root@k8s-master ingress]# kubectl apply -f nginx_basicauth.yaml 
    2 ingress.networking.k8s.io/ingress-with-auth created
    3 [root@k8s-master ingress]# 
    4 [root@k8s-master ingress]# kubectl get ingress -o wide
    5 NAME                HOSTS                                  ADDRESS   PORTS     AGE
    6 ingress-with-auth   auth.zhangtest.com                               80        6s

## 浏览器访问 ##

hosts文件修改，添加如下信息

1 文件位置：C:\WINDOWS\System32\drivers\etc\hosts
    2 添加信息如下：
    3 # K8S ingress学习
    4 10.0.0.110  www.zhangtest.com  blog.zhangtest.com auth.zhangtest.com

浏览器访问auth.zhangtest.com

http://auth.zhangtest.com/

![fae826100ad3e3e4478733495445b4f4.png][]

# Ingress-Nginx实现Rewrite重写 #

官网地址：

https://kubernetes.github.io/ingress-nginx/examples/rewrite/

重写可以使用以下注解控制：

<table> 
 <thead> 
  <tr> 
   <th>名称</th> 
   <th>描述</th> 
   <th>值</th> 
  </tr> 
 </thead> 
 <tbody> 
  <tr> 
   <td>nginx.ingress.kubernetes.io/rewrite-target</td> 
   <td>必须重定向的目标URL</td> 
   <td>String</td> 
  </tr> 
  <tr> 
   <td>nginx.ingress.kubernetes.io/ssl-redirect</td> 
   <td>指示位置部分是否只能由SSL访问(当Ingress包含证书时，默认为True)</td> 
   <td>Bool</td> 
  </tr> 
  <tr> 
   <td>nginx.ingress.kubernetes.io/force-ssl-redirect</td> 
   <td>即使Ingress没有启用TLS，也强制重定向到HTTPS</td> 
   <td>Bool</td> 
  </tr> 
  <tr> 
   <td>nginx.ingress.kubernetes.io/app-root</td> 
   <td>定义应用程序根目录，Controller在“/”上下文中必须重定向该根目录</td> 
   <td>String</td> 
  </tr> 
  <tr> 
   <td>nginx.ingress.kubernetes.io/use-regex</td> 
   <td>指示Ingress上定义的路径是否使用正则表达式</td> 
   <td>Bool</td> 
  </tr> 
 </tbody> 
</table>

ingress yaml文件

1 [root@k8s-master ingress]# pwd
     2 /root/k8s_practice/ingress
     3 [root@k8s-master ingress]# cat nginx_rewrite.yaml 
     4 apiVersion: networking.k8s.io/v1beta1
     5 kind: Ingress
     6 metadata:
     7   annotations:
     8     nginx.ingress.kubernetes.io/rewrite-target: https://www.baidu.com
     9   name: rewrite
    10   namespace: default
    11 spec:
    12   rules:
    13   - host: rewrite.zhangtest.com
    14     http:
    15       paths:
    16       - backend:
    17           serviceName: myapp-clusterip1
    18           servicePort: 80

启动ingress并查看状态

1 [root@k8s-master ingress]# kubectl apply -f nginx_rewrite.yaml 
    2 ingress.networking.k8s.io/rewrite created
    3 [root@k8s-master ingress]# 
    4 [root@k8s-master ingress]# kubectl get ingress -o wide
    5 NAME                HOSTS                   ADDRESS          PORTS     AGE
    6 rewrite             rewrite.zhangtest.com                    80        13s

## 浏览器访问 ##

hosts文件修改，添加如下信息

1 文件位置：C:\WINDOWS\System32\drivers\etc\hosts
    2 添加信息如下：
    3 # K8S ingress学习
    4 10.0.0.110  www.zhangtest.com  blog.zhangtest.com auth.zhangtest.com  rewrite.zhangtest.com

浏览器访问rewrite.zhangtest.com

http://rewrite.zhangtest.com/

![ea457d002a7a3df0a5a5b28899a028e9.png][]

之后，可见重定向到了[https://www.baidu.com 百度页面][https_www.baidu.com]

[5d393aed9aa4762e6ce5a4ef9caf85e9.png]: /images/20221120/1a73990b52d14486a6c32de048a8c95d.png
[5c4195de35df7bf0950f46264a14d838.png]: /images/20221120/5bbce8ad097b4df297d41c261b995781.png
[d96450bfacb8bf069a15cf129b0dffec.png]: https://img-blog.csdnimg.cn/img_convert/d96450bfacb8bf069a15cf129b0dffec.png
[59a93043569348641ca7d39f62a626ad.png]: https://img-blog.csdnimg.cn/img_convert/59a93043569348641ca7d39f62a626ad.png
[www.zhangtest.com]: http://www.zhangtest.com/
[a86feef4274ff350e8f3a60293fe38a8.png]: https://img-blog.csdnimg.cn/img_convert/a86feef4274ff350e8f3a60293fe38a8.png
[11f755e2c41dbcc0a934593cad2c9f54.png]: https://img-blog.csdnimg.cn/img_convert/11f755e2c41dbcc0a934593cad2c9f54.png
[f8c797af02d6e3f186d23f7531ff0941.png]: https://img-blog.csdnimg.cn/img_convert/f8c797af02d6e3f186d23f7531ff0941.png
[605111232eb610be9e9f8f067b107dc2.png]: https://img-blog.csdnimg.cn/img_convert/605111232eb610be9e9f8f067b107dc2.png
[fae826100ad3e3e4478733495445b4f4.png]: https://img-blog.csdnimg.cn/img_convert/fae826100ad3e3e4478733495445b4f4.png
[ea457d002a7a3df0a5a5b28899a028e9.png]: https://img-blog.csdnimg.cn/img_convert/ea457d002a7a3df0a5a5b28899a028e9.png
[https_www.baidu.com]: https://www.baidu.xn--com-vy2fl66hqi5b8tb/