apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
  name: valkey-alerts
  namespace: data
  labels:
    role: alert-rules
    release: kube-prometheus-stack
spec:
  groups:
    - name: valkey
      rules:
        - alert: ValkeyDown
          expr: |
            kube_deployment_status_replicas_available{namespace="data", deployment="valkey"} == 0
          for: 2m
          labels:
            severity: critical
          annotations:
            summary: "Valkey (Redis) is down"
            description: "Valkey cache server is down. All apps using Redis/Celery are affected."