groups:
  - name: storage
    rules:
      - alert: DiskSpaceWarning
        expr: (node_filesystem_size_bytes{fstype!~"tmpfs|overlay"} - node_filesystem_free_bytes{fstype!~"tmpfs|overlay"}) / node_filesystem_size_bytes{fstype!~"tmpfs|overlay"} > 0.80
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: "Disk >80% on {{ $labels.instance }} {{ $labels.mountpoint }}"

      - alert: DiskSpaceCritical
        expr: (node_filesystem_size_bytes{fstype!~"tmpfs|overlay"} - node_filesystem_free_bytes{fstype!~"tmpfs|overlay"}) / node_filesystem_size_bytes{fstype!~"tmpfs|overlay"} > 0.90
        for: 5m
        labels:
          severity: critical
        annotations:
          summary: "Disk >90% on {{ $labels.instance }} {{ $labels.mountpoint }}"

      - alert: DiskInodesLow
        expr: (node_filesystem_files{fstype!~"tmpfs|overlay"} - node_filesystem_files_free{fstype!~"tmpfs|overlay"}) / node_filesystem_files{fstype!~"tmpfs|overlay"} > 0.80
        for: 10m
        labels:
          severity: warning
        annotations:
          summary: "Inodes >80% on {{ $labels.instance }} {{ $labels.mountpoint }}"