---
groups:
  - name: system.rules
    rules:
      - alert: HostDown
        expr: up == 0
        for: 2m
        labels: {severity: critical}
        annotations:
          summary: "Хост {{ $labels.instance }} недоступен"

      - alert: HighCPULoad
        expr: avg by (instance)(rate(node_cpu_seconds_total{mode!="idle"}[5m])) > 0.90
        for: 10m
        labels: {severity: warning}
        annotations:
          summary: "Высокая загрузка CPU на {{ $labels.instance }}"

      - alert: LowDiskSpace
        expr: (node_filesystem_avail_bytes{fstype!~"tmpfs|overlay"} / node_filesystem_size_bytes{fstype!~"tmpfs|overlay"}) < 0.10
        for: 5m
        labels: {severity: critical}
        annotations:
          summary: "Мало места на {{ $labels.instance }} {{ $labels.mountpoint }}"