apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: seckill
spec:
  scaleTargetRef:
    apiVersion: apps/v1
    kind: Deployment
    name: seckill
  pollingInterval: 15
  minReplicaCount: 2 # 至少保留 2 个副本
  maxReplicaCount: 1000
  advanced:
    horizontalPodAutoscalerConfig:
      behavior: # 控制扩缩容行为，使用比较保守的策略，快速扩容，缓慢缩容
        scaleDown: # 缓慢缩容：至少冷却 10 分钟才能缩容
          stabilizationWindowSeconds: 600
          policies:
            - type: Percent
              value: 100
              periodSeconds: 15
        scaleUp: # 快速扩容：每 15s 最多允许扩容 5 倍
          policies:
            - type: Percent
              value: 500
              periodSeconds: 15
  triggers:
    - type: cron # 每天早上 10 点秒杀活动，确保前后半小时内至少有 200 个副本
      metadata:
        timezone: Asia/Shanghai
        start: 30 9 * * *
        end: 30 10 * * *
        desiredReplicas: "200"
    - type: cron # 每天晚上 6 点秒杀活动，确保前后半小时内至少有 200 个副本
      metadata:
        timezone: Asia/Shanghai
        start: 30 17 * * *
        end: 30 18 * * *
        desiredReplicas: "200"
    - type: memory # CPU 利用率超过 60% 扩容
      metricType: Utilization
      metadata:
        value: "60"
    - type: cpu # 内存利用率超过 60% 扩容
      metricType: Utilization
      metadata:
        value: "60"