// server.js
const express = require('express');
const app = express();
const port = process.env.PORT || 3000;
<p>app.get('/', (req, res) => {
res.send('Hello from Kubernetes!');
});</p><p>app.listen(port, () => {
console.log(<code>Server running on port ${port}</code>);
});</p>

{
  "name": "my-js-app",
  "version": "1.0.0",
  "main": "server.js",
  "scripts": {
    "start": "node server.js"
  },
  "dependencies": {
    "express": "^4.18.0"
  }
}

# 使用官方Node.js镜像
FROM node:18-alpine
<h1>设置工作目录</h1><p>WORKDIR /usr/src/app</p><h1>复制 package.json 和 package-lock.json</h1><p>COPY package*.json ./</p><h1>安装依赖</h1><p>RUN npm install</p><h1>复制源码</h1><p>COPY . .</p><h1>暴露端口</h1><p>EXPOSE 3000</p><h1>启动命令</h1><p>CMD ["npm", "start"]</p>
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docker build -t my-js-app:v1 .

docker tag my-js-app:v1 your-dockerhub-username/my-js-app:v1
docker push your-dockerhub-username/my-js-app:v1

apiVersion: apps/v1
kind: Deployment
metadata:
  name: js-app-deployment
  labels:
    app: js-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: js-app
  template:
    metadata:
      labels:
        app: js-app
    spec:
      containers:
      - name: js-app
        image: your-dockerhub-username/my-js-app:v1
        ports:
        - containerPort: 3000
        resources:
          limits:
            memory: "128Mi"
            cpu: "200m"
---
apiVersion: v1
kind: Service
metadata:
  name: js-app-service
spec:
  type: LoadBalancer
  selector:
    app: js-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 3000

kubectl apply -f deployment.yaml

kubectl get pods -l app=js-app

kubectl get service js-app-service

minikube service js-app-service --url