apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: redis-scaler
  namespace: redis
spec:
  scaleTargetRef:
    name: redis
  minReplicaCount: 0                    # 空闲时缩容到 0
  maxReplicaCount: 5                    # 最多 5 个副本
  pollingInterval: 30                   # 每 30 秒检查一次
  cooldownPeriod: 300                   # 缩容冷却期 5 分钟
  triggers:
  - type: prometheus
    metadata:
      serverAddress: http://kube-prometheus-stack-prometheus.monitoring.svc.cluster.local:9090
      metricName: redis_connected_clients
      query: sum(redis_connected_clients{namespace="redis"})
      threshold: "1"                    # 有连接时启动
  - type: cpu
    metricType: Utilization
    metadata:
      value: "70"                       # CPU 使用率超过 70% 时扩容