groups:
- name: Hardware alerts
  rules:
  - alert: Instancedown
    expr: up == 0
    for: 5m
    labels:
      severity: warning
    annotations:
      title: Instance {{ $labels.instance }} is down
      description: Failed to scrape {{ $labels.job }} on {{ $labels.instance }} for more than 5 minute. Instance seems down.
  - alert: LowRootDiskSpace
    expr: (node_filesystem_free_bytes{device =~ "/dev/.+"} / node_filesystem_size_bytes{device =~ "/dev/.+"} * 100) < 10
    for: 5m
    labels:
      severity: warning
    annotations:
      title: Low free root space on {{ $labels.instance }}
      description: On {{ $labels.instance }} device {{ $labels.device }} mounted on {{ $labels.mountpoint }} has low free space of {{ $value }}%
  - alert: LowDataDiskSpace
    expr: (node_filesystem_free_bytes{device !~ "/dev/.+", fstype !~ "tmpfs|.*lxcfs"} / node_filesystem_size_bytes{device !~ "/dev/.+", fstype !~ "tmpfs|.*lxcfs"} * 100) < 10
    for: 5m
    labels:
      severity: warning
    annotations:
      title: Low free data space on {{ $labels.instance }}
      description: On {{ $labels.instance }} device {{ $labels.device }} mounted on {{ $labels.mountpoint }} has low free space of {{ $value }}%
  - alert: HighCPULoad
    expr: 100 - (avg by(instance) (irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 90
    for: 5m
    labels:
      severity: warning
    annotations:
      title: High CPU load on instance {{ $labels.instance }}
      description: Instance {{ $labels.instance }} has high CPU load.
  - alert: HighMemoryUsage
    expr: (1 - ((node_memory_MemFree_bytes + node_memory_Buffers_bytes + node_memory_Cached_bytes) / node_memory_MemTotal_bytes)) * 100 > 90
    for: 5m
    labels:
      severity: warning
    annotations:
      description: Instance {{ $labels.instance }} has high memory usage
      summary: High memory usage on {{ $labels.instance }}