apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: cnpg-backup-alert
  namespace: database
spec:
  groups:
    - name: cnpg.rules
      rules:
        - alert: CNPGBackupMissing
          expr: time() - cnpg_last_backup_time_seconds > 86400
          for: 10m
          labels:
            severity: critical
          annotations:
            summary: "CNPG Backup missing"
            description: "No backup in last 24h"