Kubernetes K8S之Ingress详解与示例

时间：2020-09-28来源：www.pcxitongcheng.com作者：电脑系统城

K8S之Ingress概述与说明，并详解Ingress常用示例

主机配置规划

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

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

Ingress示例

架构图

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

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

浏览器访问blog.zhangtest.com

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

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

浏览器访问blog.zhangtest.com

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

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/

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：

名称	描述	值
nginx.ingress.kubernetes.io/rewrite-target	必须重定向的目标URL	String
nginx.ingress.kubernetes.io/ssl-redirect	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)	Bool
nginx.ingress.kubernetes.io/force-ssl-redirect	即使Ingress没有启用TLS，也强制重定向到HTTPS	Bool
nginx.ingress.kubernetes.io/app-root	定义应用程序根目录，Controller在“/”上下文中必须重定向该根目录	String
nginx.ingress.kubernetes.io/use-regex	指示Ingress上定义的路径是否使用正则表达式	Bool

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