将 nginx-ingress 主机名引用到内部服务

Question

创建所有需要的资源并配置 nginx-ingress 控制器后。

apiVersion: apps/v1
kind: Deployment
metadata:
  name: user-api
spec:
  replicas: 1
  selector:
    matchLabels:
      app: user-api
  strategy: {}
  template:
    metadata:
      labels:
        app: user-api
    spec:
      dnsPolicy: ClusterFirstWithHostNet
      hostNetwork: true
      containers:
      - name: user-api
        image: doumeyi/user-api-amd64:1.0
        ports:
        - name: user-api
          containerPort: 3000
        resources: {}
---
apiVersion: v1
kind: Service
metadata:
  name: user-api
spec:
  selector:
    app: user-api
  ports:
  - name: user-api
    port: 3000
    targetPort: 3000
  type: LoadBalancer
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: app-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
    - host: example.com
      http:
        paths:
        - path: /user-api
          backend:
            serviceName: user-api
            servicePort: 3000

我可以查看 example.com 显示 404 未找到页面，但也看不到示例。com/user-api 显示我在 user-api 服务中构建的任何消息。

nginx-ingress 似乎无法将主机名解析为内部服务，我该如何解决？

Answer 1

如果 NGINX 找不到到您的 Pod 的路由，它不应以 404 响应。相反，它应该给出 502（错误的网关）AFAIK。我假设 404 来自您的应用程序。

如前所述，NGINX-Ingress 在 0.22 中更改了行为 here 入口资源应如下所示：

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: app-ingress
  annotations:
    nginx.ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
    - host: example.com
      http:
        paths:
        - path: /user-api(/|$)(.*)
          backend:
            serviceName: user-api

将 nginx-ingress 主机名引用到内部服务

Reference nginx-ingress host name to internal service

kubernetes-ingress

nginx-ingress