---
apiVersion: v1
kind: Service
metadata:
name: nginx-hpa-svc
spec:
ports:
- port: 80
selector:
app: nginx-hpa

保存为nginx-hpa.yaml并执行：

kubectl apply -f nginx-hpa.yaml

4.2 创建HPA策略

apiVersion: autoscaling/v2
kind: HorizontalPodAutoscaler
metadata:
  name: nginx-hpa-hpa
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: nginx-hpa
  minReplicas: 1
  maxReplicas: 10
  metrics:
  - type: Resource
    resource:
      name: cpu
      target:
        type: Utilization
        averageUtilization: 50
  - type: Resource
    resource:
      name: memory
      target:
        type: Utilization
        averageUtilization: 80

保存为hpa.yaml并执行：

kubectl apply -f hpa.yaml

五、测试弹性伸缩

使用压测工具模拟高负载：

# 安装stress工具到Pod
kubectl run -it --rm load-generator --image=busybox --restart=Never -- /bin/sh -c

天亿互联：Kubernetes集群自动化部署与弹性伸缩实战教程

天亿互联：Kubernetes集群自动化部署与弹性伸缩实战教程

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