groups:
  - name: expiry-api-rules
    rules:
      - alert: ExpiryApiDown
        expr: up{job="wx_service_api"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "wx_service API 实例不可用"
          description: "实例 {{ $labels.instance }} 已连续 1 分钟不可用"

      - alert: ExpiryApiHighLatencyP95
        expr: histogram_quantile(0.95, sum(rate(http_request_duration_seconds_bucket{job="wx_service_api",path=~"/api/expiry/.*"}[5m])) by (le)) > 0.5
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "Expiry API P95 延迟过高"
          description: "过去 5 分钟 P95 延迟超过 500ms"

      - alert: ExpiryApiErrorRateHigh
        expr: (sum(rate(http_requests_total{job="wx_service_api",path=~"/api/expiry/.*",status=~"5.."}[5m])) / sum(rate(http_requests_total{job="wx_service_api",path=~"/api/expiry/.*"}[5m]))) > 0.03
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "Expiry API 5xx 错误率过高"
          description: "过去 5 分钟 5xx 错误率超过 3%"