NGINX 入口未到达服务（clusterIP）

Question

我正在尝试在 Kubernetes 集群中部署节点 js 应用程序。我为此创建了部署和服务（clusterIp），并在 nginx 入口配置文件中添加了一个角色，但似乎 nginx 无法访问该服务。

NodeJs 应用程序：

'use strict';

const express = require('express');

// Constants
const PORT = 5678;
const HOST = '0.0.0.0';

// App
const app = express();
app.get('/', (req, res) => {
  console.log("request received");
  res.send('Hello World');
});

app.listen(PORT, HOST);
console.log(`Running on http://${HOST}:${PORT}`);

Docker 文件：

FROM node:14

# Create app directory
WORKDIR /usr/src/app

# Install app dependencies
# A wildcard is used to ensure both package.json AND package-lock.json are copied
# where available (npm@5+)
COPY package*.json ./

RUN npm install
# If you are building your code for production
# RUN npm ci --only=production

# Bundle app source
COPY . .

EXPOSE 5678
CMD [ "node", "server.js" ]

部署：

apiVersion: apps/v1
kind: Deployment
metadata:
  name: apple-app-deployment
  labels:
    app: apple
spec:
  replicas: 2
  selector:
    matchLabels:
      app: apple
  template:
    metadata:
      labels:
        app: apple
    spec:
      containers:
      - name: apple-app
        image: anudcker/node-web-appp:1
        ports:
        - containerPort: 5678

服务：

kind: Service
apiVersion: v1
metadata:
  name: apple-service
spec:
  selector:
    app: apple
  ports:
    - port: 5678 # Default port for image
      targetPort: 5678

入口：

apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: example-ingress
  annotations:
    # kubernetes.io/ingress.class: azure/application-gateway
    ingress.kubernetes.io/rewrite-target: /
spec:
  rules:
  - http:
      paths:
        - path: /apple
          pathType: Prefix
          backend:
            service:
                name: apple-service
                port:
                    number: 5678

现在，每当我尝试通过点击 /apple 访问服务时，我都会收到回复 Cannot GET /apple 来自 Nginx 入口。我在 nginx 入口控制器 pod 中找到了以下日志。

10.244.1.1 - - [07/May/2021:06:22:29 +0000] "GET /apple HTTP/1.1" 404 144 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.117 Safari/537.36" 465 0.004 [demo-apple-service-5678] [] 10.244.0.24:5678 144 0.004 404 5a5bdf8f61d59b665218be0a18a6ab4c

有什么想法吗？

Answer 1

问题是您正在使用 networking.k8s.io/v1beta1 的 rewrite-target，以及 apiVersion: networking.k8s.io/v1。

您需要将注释更新为新注释：

nginx.ingress.kubernetes.io/rewrite-target: /

NGINX 入口未到达服务（clusterIP）

NGINX Ingress is not reaching Service(clusterIP)

kubernetes

kubernetes-ingress

nginx-ingress

kubernetes-networking