groups:
  - name: application_alerts
    interval: 30s
    rules:
      - alert: HighErrorRate
        expr: sum(rate(http_requests_total{status=~"5.."}[5m])) by (job, route) / sum(rate(http_requests_total[5m])) by (job, route) > 0.05
        for: 2m
        labels:
          severity: warning
        annotations:
          summary: "应用 {{ $labels.job }} 路由 {{ $labels.route }} 错误率过高"
          description: "错误率超过5% (当前: {{ $value | humanizePercentage }})"

      - alert: HighLatency
        expr: histogram_quantile(0.95, sum(rate(http_request_duration_seconds_bucket[5m])) by (le, job, route)) > 1
        for: 3m
        labels:
          severity: warning
        annotations:
          summary: "应用 {{ $labels.job }} 路由 {{ $labels.route }} 延迟过高"
          description: "95百分位响应时间超过1秒 (当前: {{ $value }}s)"

      - alert: ApiHealthCheckFailed
        expr: up{job="fischerx-api"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "FischerX API 不可用"
          description: "API服务已超过1分钟不可用"

      - alert: HighRequestRate
        expr: sum(rate(http_requests_total[1m])) by (job) > 1000
        for: 5m
        labels:
          severity: info
        annotations:
          summary: "应用 {{ $labels.job }} 请求量过高"
          description: "当前请求率: {{ $value }} qps"

      - alert: DatabaseConnectionError
        expr: increase(database_connection_errors_total[5m]) > 10
        for: 2m
        labels:
          severity: critical
        annotations:
          summary: "数据库连接错误"
          description: "过去5分钟内数据库连接错误: {{ $value }} 次"

      - alert: CacheHitRateLow
        expr: (sum(rate(cache_hits_total[5m])) by (job) / sum(rate(cache_requests_total[5m])) by (job)) < 0.7
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "应用 {{ $labels.job }} 缓存命中率过低"
          description: "缓存命中率低于70% (当前: {{ $value | humanizePercentage }})"