Question

我正在尝试在本地minikube中部署应用程序。当我启动minikube时，我可以连接到前端，但不能连接到后端。

以下是yaml文件

入口

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  name: ingress-service
  annotations:
    kubernetes.io/ingress.class: nginx
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
    - http:
        paths:
          - path: /
            backend:
              serviceName: client-cluster-ip-service
              servicePort: 3000
          - path: /api/
            backend:
              serviceName: server-cluster-ip-service
              servicePort: 8080

UI部署

apiVersion: apps/v1
kind: Deployment
metadata:
  name: client-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      component: web

  template:
    metadata:
      labels:
        component: web
    spec:
      containers:
        - name: client
          image: registry.gitlab.com/test/test1/test2/app-UI
          ports:
            - containerPort: 3000
      imagePullSecrets:
        - name: gitlab-auth

UI服务

apiVersion: v1
# sets up networking in kubernetes cluster
kind: Service
metadata:
  name: client-cluster-ip-service
spec:
  selector:
    component: web
  ports:
    - port: 3000
      targetPort: 3000

后端部署

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      component: server
  template:
    metadata:
      labels:
        component: server
    spec:
      containers:
        - name: server
          image: registry.gitlab.com/test1/test2/test3/test4-api
          ports:
            - containerPort: 8080
      imagePullSecrets:
        - name: gitlab-auth

后端服务

apiVersion: v1
kind: Service
metadata:
  name: server-cluster-ip-service
spec:
  type: ClusterIP
  selector:
    component: server
  ports:
    - port: 8080
      targetPort: 8080

我在浏览器上不断出现以下错误

POST https://192.168.99.111/api/auth/login 404
dispatchXhrRequest  @   xhr.js:155
xhrAdapter  @   xhr.js:16
dispatchRequest @   dispatchRequest.js:49
Promise.then (async)        
request @   Axios.js:55
Axios.<computed>    @   Axios.js:74
wrap    @   bind.js:11
(anonymous) @   LoginForm.tsx:34
callback    @   createBaseForm.js:554
(anonymous) @   createBaseForm.js:579
validateFields  @   createBaseForm.js:541
LoginForm.handleSubmit  @   LoginForm.tsx:17
callCallback    @   react-dom.development.js:147
invokeGuardedCallbackDev    @   react-dom.development.js:196
invokeGuardedCallback   @   react-dom.development.js:250
invokeGuardedCallbackAndCatchFirstError @   react-dom.development.js:265
executeDispatch @   react-dom.development.js:571
executeDispatchesInOrder    @   react-dom.development.js:596
executeDispatchesAndRelease @   react-dom.development.js:695
executeDispatchesAndReleaseTopLevel @   react-dom.development.js:704
forEachAccumulated  @   react-dom.development.js:676
runEventsInBatch    @   react-dom.development.js:844
runExtractedEventsInBatch   @   react-dom.development.js:852
handleTopLevel  @   react-dom.development.js:5029
batchedUpdates$1    @   react-dom.development.js:21463
batchedUpdates  @   react-dom.development.js:2247
dispatchEvent   @   react-dom.development.js:5109
(anonymous) @   react-dom.development.js:21520
unstable_runWithPriority    @   scheduler.development.js:255
interactiveUpdates$1    @   react-dom.development.js:21519
interactiveUpdates  @   react-dom.development.js:2268
dispatchInteractiveEvent    @   react-dom.development.js:5085

1）当我在不使用minikube的情况下运行该应用程序时，该应用程序运行正常。
2）当我使用minikube运行应用程序并点击https://192.168.99.111时，     前端很好。
3）一旦我尝试点击登录按钮并且应用程序尝试连接到     后端，出现上述错误。
4）由于某种原因，在运行时无法连接到后端     minikube和我一直在获取资源未找到错误。

192.168.99.111是minikube ip

我是kubernetes的新手，任何调试方面的帮助都将受到高度赞赏。

更新

我认为它与入口控制器有关当我在Ingress Controller日志中看到它时，显示

192.168.99.1 - [192.168.99.1] - - [10/Jun/2019:00:07:58 +0000] "POST /api/auth/login HTTP/1.1" 404 19 "http://192.168.99.116/auth/login?redirect=/" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36" 520 0.001 [default-server-cluster-ip-service-8080] 172.17.0.8:8080 19 0.002 404 702298110b92307929f9817bb50c47ff

应该代替http://192.168.99.116/auth/login?redirect=/， http://192.168.99.116/api/auth/login?redirect=/

为什么/api掉线了？

Answer 1

您的入口配置没有问题。您的后端应用程序具有将自身重定向到/auth/login路径的规则，如果要添加前缀，则无法通过Ingress控制器解决。您必须配置后端API才能通过应用程序代码处理这些URL。

Answer 2

这就是nginx.ingress.kubernetes.io/rewrite-target: /为您所做的。它将删除您的入口配置中的前缀。您可以删除此注释以将/api/保留在路径中。

查看此内容：https://github.com/kubernetes/ingress-nginx/tree/master/docs/examples/rewrite

无法使用minikube连接到后端

2 个答案: