apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: navigation-scaler
  namespace: navigation
spec:
  scaleTargetRef:
    name: navigation
  minReplicaCount: 1                    # 至少保持 1 个副本（HPA 限制）
  maxReplicaCount: 10                   # 最多 10 个副本
  pollingInterval: 15                   # 每 15 秒检查一次
  cooldownPeriod: 180                   # 缩容冷却期 3 分钟
  triggers:
  - type: prometheus
    metadata:
      serverAddress: http://kube-prometheus-stack-prometheus.monitoring.svc.cluster.local:9090
      metricName: nginx_http_requests_total
      query: sum(rate(nginx_http_requests_total{namespace="navigation"}[1m]))
      threshold: "10"                   # 每分钟超过 10 个请求时启动
  - type: cpu
    metricType: Utilization
    metadata:
      value: "60"                       # CPU 使用率超过 60% 时扩容