KEDA 基于 Prometheus 指标自动伸缩实践

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title: KEDA 基于 Prometheus 指标自动伸缩实践

keywords: KEDA, ScaledObject, prometheus trigger, threshold, pollingInterval, cooldownPeriod

description: 使用 KEDA 根据 Prometheus 指标自动伸缩 Deployment，配置触发器与轮询/冷却参数以平滑扩缩容。

categories:

• 文章资讯
• 技术教程

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ScaledObject（基于 Prometheus 指标）：

apiVersion: keda.sh/v1alpha1
kind: ScaledObject
metadata:
  name: api-scaled
  namespace: default
spec:
  scaleTargetRef:
    name: api
  minReplicaCount: 2
  maxReplicaCount: 20
  pollingInterval: 30
  cooldownPeriod: 300
  triggers:
  - type: prometheus
    metadata:
      serverAddress: http://prometheus-operated.default.svc.cluster.local
      metricName: http_requests_per_second
      query: sum(rate(http_requests_total{service="api"}[2m]))
      threshold: "100"