您如何让客户端部署与 kubernetes 中的 api 部署通信

Question

我在本地主机和云中得到的只是 CORS 错误。如果我手动输入 localhost 或者我手动获取服务外部 IP 并在部署之前将其输入到 k8s 部署文件中，它会起作用，但是如果我必须启动服务、获取外部 IP 和然后在每次启动之前将其放入配置中。

API 服务

apiVersion: v1
kind: Service
metadata:
  labels:
    app: api
  name: api-service
spec:
  ports:
  - port: 8080 # expose the service on internal port 80
    protocol: TCP
    targetPort: 8080 # our nodejs app listens on port 8080
  selector:
    app: api # select this application to service
  type: LoadBalancer
status:
  loadBalancer: {}

客户服务

apiVersion: v1
kind: Service
metadata:
  name: client-service
spec:
  ports:
  - port: 80
    targetPort: 80
    protocol: TCP
  selector:
    app: client
  type: LoadBalancer
status:
  loadBalancer: {}

API部署

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: api
  name: api-deployment
spec:
  selector:
    matchLabels:
      app: api
  template:
    metadata:
      labels:
        app: api
    spec:
      containers:
      - image: mjwrazor/docker-js-stack-api:latest
        name: api-container
        imagePullPolicy: IfNotPresent
        resources: {}
        stdin: true
        tty: true
        workingDir: /app
        ports:
        - containerPort: 8080
        args:
        - npm
        - run
        - start
        envFrom:
        - configMapRef:
            name: server-side-configs
      restartPolicy: Always
      volumes: null
      serviceAccountName: ""
status: {}

客户端部署

apiVersion: apps/v1
kind: Deployment
metadata:
  labels:
    app: client
  name: client-deployment
spec:
  selector:
    matchLabels:
      app: client
  template:
    metadata:
      labels:
        app: client
    spec:
      restartPolicy: Always
      serviceAccountName: ""
      containers:
      - image: mjwrazor/docker-js-stack-client:latest
        name: client-container
        imagePullPolicy: IfNotPresent
        resources: {}
        ports:
        - containerPort: 80
status: {}

我尝试添加入口

apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
  name: app-ingress
  annotations:
    nginx.ingress.kubernetes.io/enable-cors: "true"
    nginx.ingress.kubernetes.io/cors-allow-methods: "PUT, GET, POST, DELETE, OPTIONS"
    nginx.ingress.kubernetes.io/cors-allow-origin: http://client-service.default
    nginx.ingress.kubernetes.io/cors-allow-credentials: "true"
spec:
  rules:
    - host: api-development.default
      http:
        paths:
          - backend:
              serviceName: api-service
              servicePort: 8080

但也无济于事。这是 server.js

const express = require("express");
const bodyParser = require("body-parser");
const cors = require("cors");
const app = express();

app.use(bodyParser.json());

app.use(bodyParser.urlencoded({ extended: true }));

app.use(cors());

app.get("/", (req, res) => {
  res.json({ message: "Welcome" });
});

require("./app/routes/customer.routes.js")(app);

// set port, listen for requests
const PORT = process.env.PORT || 8080;
app.listen(PORT, () => {
  console.log(`Server is running on port ${PORT}.`);
});

但是就像我说的那样，我正在尝试通过服务的主机名来解决这个问题，而不必使用外部 IP，这是否可能，或者我是否误解了一些东西。

客户端发送axios请求。无法使用环境变量，因为在通过 webpack 和 docker 构建项目后，您无法从 k8s 注入环境变量到图像中。我确实找到了一种使用 window 全局变量创建文件然后让 k8s 用新的 window 变量覆盖该文件的非常 hacky 的方法。但我必须先获取 api 的外部 IP，然后再执行此操作。

Answer 1

正如我们在评论中所讨论的那样，您需要获得一个真实的域名才能使其正常工作，因为在您的情况下，自动 DNS 解析基本上需要它。

您如何让客户端部署与 kubernetes 中的 api 部署通信

How do you have a client deployment communicate with the api deployment in kubernetes

node.js

kubernetes

nginx-ingress