# Cài đặt Minikube trên Linux
curl -LO https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64
sudo install minikube-linux-amd64 /usr/local/bin/minikube

# Khởi động Minikube
minikube start

# Kiểm tra trạng thái node
kubectl get nodes

// app.js
const http = require('http');
const PORT = process.env.PORT || 3000;

const requestHandler = (req, res) => {
  res.end('Hello, World!');
};

const server = http.createServer(requestHandler);
server.listen(PORT, () => {
  console.log(`Server running on port ${PORT}`);
});

FROM node:14-alpine
WORKDIR /app
COPY app.js .
CMD ["node", "app.js"]

docker build -t <your_dockerhub_username>/node-app:v1 .
docker push <your_dockerhub_username>/node-app:v1

apiVersion: apps/v1
kind: Deployment
metadata:
  name: node-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: node-app
  template:
    metadata:
      labels:
        app: node-app
    spec:
      containers:
        - name: node-container
          image: <your_dockerhub_username>/node-app:v1
          ports:
            - containerPort: 3000

apiVersion: v1
kind: Service
metadata:
  name: node-app-service
spec:
  selector:
    app: node-app
  ports:
    - protocol: TCP
      port: 80
      targetPort: 3000
  type: LoadBalancer

kubectl apply -f deployment.yaml
kubectl apply -f service.yaml

minikube service node-app-service

apiVersion: autoscaling/v1
kind: HorizontalPodAutoscaler
metadata:
  name: node-app-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: node-app
  minReplicas: 2
  maxReplicas: 10
  targetCPUUtilizationPercentage: 50

kubectl apply -f hpa.yaml

kubectl get pods
kubectl get services

kubectl run -i --tty load-generator --image=busybox /bin/sh

# Trong shell của busybox, chạy:
while true; do wget -q -O- http://<service-ip>; done

kubectl get hpa
kubectl get pods -w