apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: infrastructure-alerts
  namespace: monitoring
  labels:
    role: alert-rules
spec:
  groups:
    - name: infrastructure
      rules:
        - alert: LonghornDiskSpaceLow
          expr: (longhorn_disk_usage_bytes / longhorn_disk_capacity_bytes) > 0.90
          for: 5m
          labels:
            severity: critical
          annotations:
            summary: "Longhorn disk space critically low"
            description: "Longhorn disk on {{ $labels.node }} is over 90% full."

        - alert: LonghornVolumeSpaceLow
          expr: (longhorn_volume_actual_size_bytes / longhorn_volume_capacity_bytes) > 0.85
          for: 5m
          labels:
            severity: warning
          annotations:
            summary: "Longhorn volume space low"
            description: "Longhorn volume {{ $labels.volume }} is over 85% full."

        - alert: CertExpiringCritical
          expr: (certmanager_certificate_expiration_timestamp_seconds - time()) < 86400
          for: 10m
          labels:
            severity: critical
          annotations:
            summary: "Certificate expiring in less than 24 hours"
            description: "Certificate {{ $labels.name }} in {{ $labels.namespace }} expires in less than 24 hours"

        - alert: CertExpiringSoon
          expr: (certmanager_certificate_expiration_timestamp_seconds - time()) < 604800
          for: 30m
          labels:
            severity: warning
          annotations:
            summary: "Certificate expiring in less than 7 days"
            description: "Certificate {{ $labels.name }} in {{ $labels.namespace }} expires in less than 7 days"

        - alert: CertNotReady
          expr: certmanager_certificate_ready_status{condition="True"} != 1
          for: 10m
          labels:
            severity: warning
          annotations:
            summary: "Certificate not ready"
            description: "Certificate {{ $labels.name }} in {{ $labels.namespace }} is not in a ready state."