k8s之Ingress 实现 http 代理访问

前提：

1、服务器已经运行了 ingress-controller 服务

2、测试用 Nginx 镜像已经上传到仓库（方便测试用，也可忽略）

一、查看运行环境是否正常

[root@k8s-master ingress]# kubectl get pods -n ingress-nginx
NAME                                        READY   STATUS    RESTARTS   AGE
default-http-backend-5c9bb94849-snbm7       1/1     Running   0          19h
nginx-ingress-controller-84d5b54fdf-hrx7p   1/1     Running   0          19h
[root@k8s-master ingress]# kubectl get svc -n ingress-nginx
NAME                   TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
default-http-backend   ClusterIP   10.103.169.169   <none>        80/TCP                       19h
ingress-nginx          NodePort    10.107.203.11    <none>        80:32080/TCP,443:32443/TCP   18h
[root@k8s-master ingress]# 

 

 

 

 

二、搭建 test-v1 服务

书写一个 test-v1.yaml 配置文件，用于发布服务

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-v1
spec:
  replicas: 2
  template:
    metadata:
      labels:
        name: nginx
    spec:
      containers:
      - name: nginx
        image: registry.cn-hangzhou.aliyuncs.com/wangzy001/nginx:v1  #提前在阿里云准备好的测试镜像
        imagePullPolicy: IfNotPresent #拉取策略
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata: 
  name: test-v1
spec:
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
  selector:
    name: nginx

发布 test-v1 服务并检查

# 1、书写并运行资源配置文件
[root@k8s-master ingress]# vi test-v1.yml
[root@k8s-master ingress]# kubectl apply -f test-v1.yml 
deployment.extensions/nginx-v1 created
service/test-v1 created

# 2、查看 Service 服务
[root@k8s-master ingress]# kubectl get svc
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP   9d
test-v1      ClusterIP   10.106.123.237   <none>        80/TCP    12s

# 3、访问测试页面
[root@k8s-master ingress]# curl 10.106.123.237
Hello wangzy! This is v1 version

 

二、搭建 test-v2 服务

1、直接复制 test-v1.yml 配置文件，并修改内容（也可自己重新书写）

[root@k8s-master ingress]# cp test-v1.yml test-v2.yml 
[root@k8s-master ingress]# vi test-v2.yml 

修改内容如下

apiVersion: extensions/v1beta1
kind: Deployment
metadata:
  name: nginx-v2
spec:
  replicas: 2
  template:
    metadata:
      labels:
        name: nginx-version2
    spec:
      containers:
      - name: nginx-version
        image: registry.cn-hangzhou.aliyuncs.com/wangzy001/nginx:v2  #提前在阿里云准备好的测试镜像
        imagePullPolicy: IfNotPresent 
        ports:
        - containerPort: 80
---
apiVersion: v1
kind: Service
metadata: 
  name: test-v2
spec:
  ports:
    - port: 80
      targetPort: 80
      protocol: TCP
  selector:
    name: nginx-version2 

发布 test-v2 服务并检查

# 1、运行资源配置文件
[root@k8s-master ingress]# kubectl apply -f test-v2.yml 
deployment.extensions/nginx-v2 created
service/test-v2 created

# 2、查看 Service 服务
[root@k8s-master ingress]# kubectl get svc
NAME         TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)   AGE
kubernetes   ClusterIP   10.96.0.1        <none>        443/TCP   9d
test-v1      ClusterIP   10.106.123.237   <none>        80/TCP    9m32s
test-v2      ClusterIP   10.109.40.7      <none>        80/TCP    7s

# 访问测试页面
[root@k8s-master ingress]# curl 10.109.40.7   
Hello wangzy! This is v2 version
[root@k8s-master ingress]# 

 

三、书写 Ingress 文件，将两个 Service 服务进行代理

配置文件内容如下（也可合并）

apiVersion: extensions/v1beta1
kind: Ingress
metadata: 
  name: test-nginxv1
spec:
  rules:
   - host: www1.wangzy.com
     http:
       paths:
       - path: /
         backend:
           serviceName: test-v1
           servicePort: 80
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata: 
  name: test-nginxv2
spec:
  rules:
   - host: www2.wangzy.com
     http:
       paths:
       - path: /
         backend:
           serviceName: test-v2
           servicePort: 80

操作步骤

# 1、创建文件并运行
[root@k8s-master ingress]# vi ingress-http.yml
[root@k8s-master ingress]# kubectl apply -f ingress-http.yml 
ingress.extensions/test-nginxv1 created
ingress.extensions/test-nginxv2 created

# 2、查看 Pod 运行情况
[root@k8s-master ingress]# kubectl get pods
NAME                       READY   STATUS    RESTARTS   AGE
nginx-v1-bb59cf44c-72qmn   1/1     Running   0          17m
nginx-v1-bb59cf44c-jw8pb   1/1     Running   0          17m
nginx-v2-b478c44b4-mfb5j   1/1     Running   0          8m34s
nginx-v2-b478c44b4-z2nqf   1/1     Running   0          8m34s

# 3、查看 Ingress 信息
[root@k8s-master ingress]# kubectl get ingress
NAME           HOSTS             ADDRESS   PORTS   AGE
test-nginxv1   www1.wangzy.com             80      12m
test-nginxv2   www2.wangzy.com             80      12m
[root@k8s-master ingress]# 

# 4、查看访问信息
[root@k8s-master ingress]# kubectl get svc -n ingress-nginx
NAME                   TYPE        CLUSTER-IP       EXTERNAL-IP   PORT(S)                      AGE
default-http-backend   ClusterIP   10.103.169.169   <none>        80/TCP                       19h
ingress-nginx          NodePort    10.107.203.11    <none>        80:32080/TCP,443:32443/TCP   18h
[root@k8s-master ingress]# 

 

四、修改本地 Host 文件

# 目录位置：C:\Windows\System32\drivers\etc
部署服务对应IP www1.wangzy.com
部署服务对应IP www2.wangzy.com　

五、访问页面测试

页面一

 

 

 页面二