feat: zfs prom rules

kubernetes/apps/monitoring/kube-prometheus-stack/ks.yaml

@@ -27,3 +27,26 @@ spec:
       APP: *app
       # renovate: datasource=docker depName=quay.io/thanos/thanos
       THANOS_VERSION: v0.35.0
+---
+# yaml-language-server: $schema=https://raw.githubusercontent.com/fluxcd-community/flux2-schemas/main/kustomization-kustomize-v1.json
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: &app kube-prometheus-rules
+  namespace: flux-system
+spec:
+  targetNamespace: monitoring
+  commonMetadata:
+    labels:
+      app.kubernetes.io/name: *app
+  dependsOn:
+    - name: kube-prometheus-stack
+  path: ./kubernetes/apps/monitoring/kube-prometheus-stack/rules
+  prune: true
+  sourceRef:
+    kind: GitRepository
+    name: home-ops-kubernetes
+  wait: false
+  interval: 30m
+  retryInterval: 1m
+  timeout: 5m

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."