Nginx Ingress控制器返回404。

huangapple
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英文:

Nginx ingress controller returns 404

问题

I am trying to create Ingress for my kubernetes service. I am using minikube running on WSL2.
Here are my deployment, service and ingress settings

  1. apiVersion: apps/v1
  2. kind: Deployment
  3. metadata:
  4.     name: {{.Chart.Name}}-backend
  5.     labels:
  6.         app: {{.Chart.Name}}-backend
  7. spec:
  8.     replicas: {{ .Values.replicas }}
  9.     selector:
  10.         matchLabels:
  11.             service: backend
  12.             app: {{.Chart.Name}}-backend
  13.     template:
  14.         metadata:
  15.             labels:
  16.                 service: backend
  17.                 app: {{.Chart.Name}}-backend
  18.         spec:  
  19.             containers:
  20.             -   name: kuberdemo-app
  21.                 image: {{ .Values.image }}
  22.                 ports:
  23.                 -   containerPort: 8091
  24.                     targetPort: 8091
  25.                     protocol: TCP
  26.                     name: app-port
  27.                 envFrom:
  28.                 - configMapRef:
  29.                     name: kuberdemo-config
  30.                 startupProbe:
  31.                     httpGet:
  32.                         path: /actuator/health/liveness
  33.                         port: 14000
  34.                     failureTreshold: 2
  35.                     periodSeconds: 10
  36.                 readinessProbe:
  37.                     httpGet:
  38.                         path: /actuator/health/readiness
  39.                         port: 14000
  40.                     failureTreshold: 2
  41.                     periodSeconds: 10
  42.                 livenessProbe:
  43.                     httpGet:
  44.                         path: /actuator/health/liveness
  45.                         port: 14000
  46.                     failureTreshold: 2
  47.                     periodSeconds: 10
  48.                 resources:
  49.                     limits:
  50.                         cpu: "2000m"
  51.                         memory: "2Gi"
  52.                     requests:
  53.                         cpu: "2000m"
  54.                         memory: "2Gi"
  55.                 
  1. apiVersion: v1
  2. kind: Service
  3. metadata:
  4.   name: kuberdemo-service
  5. spec:
  6.   type: ClusterIP
  7.   selector:
  8.     app: {{.Chart.Name}}-backend
  9.   ports:
  10.     - protocol: TCP
  11.       port: 8090
  12.       targetPort: 8091
  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   rules:
  7.     - host: kuberdemo.info
  8.       http:
  9.         paths:
  10.           - path: /
  11.             pathType: Prefix
  12.             backend:
  13.               service:
  14.                 name: kuberdemo-service
  15.                 port:
  16.                   number: 8090

Service is working correctly, because I get answers from it when calling it directly.

  1. kubectl port-forward service/kuberdemo-service -n kuberdemo 8080:8090
  2. curl --location 'http://localhost:8080/users'

the answer is [] (right now there are no data in my db).

But when I am trying to call it using host or after forwarding localhost 8080 port to ingress-nginx port, I am getting 404 error from NGINX.

  1. kubectl port-forward -n ingress-nginx ingress-nginx-controller-6cc5ccb977-zzbcb  8080:80
  2. curl --location 'http://localhost:8080/users'

the answer is

  1. <html>
  2. <head><title>404 Not Found</title></head>
  3. <body>
  4. <center><h1>404 Not Found</h1></center>
  5. <hr><center>nginx</center>
  6. </body>
  7. </html>

It's my first time working with kubernetes, so it will be great if you find some mistakes in my configuration files. I suppose, I have some troubles with nginx configuration, but I don't know how to fix them.

英文:

I am trying to create Ingress for my kubernetes service. I am using minikube running on WSL2.
Here are my deployment, service and ingress settings

  1. apiVersion: apps/v1
  2. kind: Deployment
  3. metadata:
  4.     name: {{.Chart.Name}}-backend
  5.     labels:
  6.         app: {{.Chart.Name}}-backend
  7. spec:
  8.     replicas: {{ .Values.replicas }}
  9.     selector:
  10.         matchLabels:
  11.             service: backend
  12.             app: {{.Chart.Name}}-backend
  13.     template:
  14.         metadata:
  15.             labels:
  16.                 service: backend
  17.                 app: {{.Chart.Name}}-backend
  18.         spec:  
  19.             containers:
  20.             -   name: kuberdemo-app
  21.                 image: {{ .Values.image }}
  22.                 ports:
  23.                 -   containerPort: 8091
  24.                     targetPort: 8091
  25.                     protocol: TCP
  26.                     name: app-port
  27.                 envFrom:
  28.                 - configMapRef:
  29.                     name: kuberdemo-config
  30.                 startupProbe:
  31.                     httpGet:
  32.                         path: /actuator/health/liveness
  33.                         port: 14000
  34.                     failureTreshold: 2
  35.                     periodSeconds: 10
  36.                 readinessProbe:
  37.                     httpGet:
  38.                         path: /actuator/health/readiness
  39.                         port: 14000
  40.                     failureTreshold: 2
  41.                     periodSeconds: 10
  42.                 livenessProbe:
  43.                     httpGet:
  44.                         path: /actuator/health/liveness
  45.                         port: 14000
  46.                     failureTreshold: 2
  47.                     periodSeconds: 10
  48.                 resources:
  49.                     limits:
  50.                         cpu: "2000m"
  51.                         memory: "2Gi"
  52.                     requests:
  53.                         cpu: "2000m"
  54.                         memory: "2Gi"
  55.                 
  1. apiVersion: v1
  2. kind: Service
  3. metadata:
  4.   name: kuberdemo-service
  5. spec:
  6.   type: ClusterIP
  7.   selector:
  8.     app: {{.Chart.Name}}-backend
  9.   ports:
  10.     - protocol: TCP
  11.       port: 8090
  12.       targetPort: 8091
  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   rules:
  7.     - host: kuberdemo.info
  8.       http:
  9.         paths:
  10.           - path: /
  11.             pathType: Prefix
  12.             backend:
  13.               service:
  14.                 name: kuberdemo-service
  15.                 port:
  16.                   number: 8090

Service is working correctly, because I get answers from it when calling it directly.

  1. kubectl port-forward service/kuberdemo-service -n kuberdemo 8080:8090
  2. curl --location 'http://localhost:8080/users'

the answer is [] (right now there are no data in my db).

But when I am trying to call it using host or after forwarding localhost 8080 port to ingress-nginx port, I am getting 404 error from NGINX.

  1. kubectl port-forward -n ingress-nginx ingress-nginx-controller-6cc5ccb977-zzbcb  8080:80
  2. curl --location 'http://localhost:8080/users'

the answer is

  1. <html>
  2. <head><title>404 Not Found</title></head>
  3. <body>
  4. <center><h1>404 Not Found</h1></center>
  5. <hr><center>nginx</center>
  6. </body>
  7. </html>

It's my first time working with kubernetes, so it will be great if you find some mistakes in my configuration files. I suppose, I have some troubles with nginx configuration, but I don't know how to fix them.

答案1

得分: 0

你需要包括一个 -H Host 头部。

您的 Ingress 定义如下，Ingress 控制器使用它：

  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   rules:
  7.     - host: kuberdemo.info
  8.       http:
  9.         paths:
  10.           - path: /
  11.             pathType: Prefix
  12.             backend:
  13.               service:
  14.                 name: kuberdemo-service
  15.                 port:
  16.                   number: 8090

没有一个针对 localhost 的块，所以当您执行以下操作时：

  1. curl --location 'http://localhost:8080/users'

Nginx 寻找具有 localhost 块的 Ingress，找不到，然后转到默认的 404 后端。

尝试：

  1. curl --location 'http://localhost:8080/users' -H "Host: kuberdemo.info"
英文:

You need to include a -H Host header.

Your ingress definition, which the ingress controller uses:

  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   rules:
  7.     - host: kuberdemo.info
  8.       http:
  9.         paths:
  10.           - path: /
  11.             pathType: Prefix
  12.             backend:
  13.               service:
  14.                 name: kuberdemo-service
  15.                 port:
  16.                   number: 8090

Doesn't have a block for localhost so when you do

  1. curl --location 'http://localhost:8080/users'

Nginx looks for an ingress that has a block for localhost, doesn't find one, and goes to the default 404 backend.

Try:

  1. curl --location 'http://localhost:8080/users' -H "Host: kuberdemo.info"

答案2

得分: 0

你错过了Ingress类名，请按照下面的示例添加ingressClassName：

  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   ingressClassName: nginx
  7.   rules:
  8.     - host: kuberdemo.info
  9.       http:
  10.         paths:
  11.           - path: /
  12.             pathType: Prefix
  13.             backend:
  14.               service:
  15.                 name: kuberdemo-service
  16.                 port:
  17.                   number: 8090
英文:

You missed the ingress class name,add ingressclassname as shown below:

  1. apiVersion: networking.k8s.io/v1
  2. kind: Ingress
  3. metadata:
  4.   name: kuberdemo-ingress
  5. spec:
  6.   ingressClassName: nginx
  7.   rules:
  8.     - host: kuberdemo.info
  9.       http:
  10.         paths:
  11.           - path: /
  12.             pathType: Prefix
  13.             backend:
  14.               service:
  15.                 name: kuberdemo-service
  16.                 port:
  17.                   number: 8090

huangapple
  • 本文由 发表于 2023年5月14日 03:28:35
  • 转载请务必保留本文链接：https://go.coder-hub.com/76244534.html
  • kubernetes
  • minikube
  • nginx-ingress
  • wsl-2
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