feat: zfs prom rules

kubernetes/apps/monitoring/kube-prometheus-stack/rules/kustomization.yaml

@@ -0,0 +1,7 @@
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/kustomization.json
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: monitoring
+resources:
+  - ./zfs.yaml

kubernetes/apps/monitoring/kube-prometheus-stack/rules/zfs.yaml

@@ -0,0 +1,18 @@
+---
+apiVersion: monitoring.coreos.com/v1
+kind: PrometheusRule
+metadata:
+  name: zrepl-replication-errors
+  namespace: monitoring
+spec:
+  groups:
+  - name: zrepl.rules
+    rules:
+    - alert: ZreplReplicationFilesystemErrors
+      expr: zrepl_replication_filesystem_errors > 0
+      for: 15m  # Alert if the condition persists for 15 minutes
+      labels:
+        severity: warning
+      annotations:
+        summary: "Zrepl replication filesystem errors detected"
+        description: "Zrepl job {{ $labels.zrepl_job }} has encountered filesystem errors during replication."