groups:
  - name: disk
    interval: 15s
    rules:
      - alert: HighDiskUsageRoot
        expr: (1 - node_filesystem_avail_bytes{mountpoint="/"} / node_filesystem_size_bytes{mountpoint="/"}) > 0.8
        for: 5m
        labels:
          severity: critical
          alert_type: disk
        annotations:
          summary: "主机 {{ $labels.hostname }} 根分区磁盘使用率过高"
          description: "根分区 / 当前使用率: {{ $value | humanizePercentage }}（阈值80%）"

      - alert: HighDiskUsageData
        expr: (1 - node_filesystem_avail_bytes{mountpoint="/data"} / node_filesystem_size_bytes{mountpoint="/data"}) > 0.9
        for: 5m
        labels:
          severity: warning
          alert_type: disk
        annotations:
          summary: "主机 {{ $labels.hostname }} /data 分区磁盘使用率过高"
          description: "/data 分区当前使用率: {{ $value | humanizePercentage }}（阈值90%）"