feat: Add longhorn backup job

clusters/testing/kustomization.yaml

@@ -14,3 +14,4 @@ resources:
   - ../../configs/letsencrypt/letsencrypt.yaml
   - ../../configs/certificates/certificates.yaml
   - ../../configs/telegram-alerts/telegram-alerts.yaml
+  - ../../configs/longhorn-jobs/longhorn-jobs.yaml

configs/artifacts.yaml

@@ -24,3 +24,8 @@ spec:
       copy:
         - from: "@foundation/configs/telegram-alerts/**"
           to: "@artifact/"
+    - name: longhorn-jobs
+      originRevision: "@foundation"
+      copy:
+        - from: "@foundation/configs/longhorn-jobs/**"
+          to: "@artifact/"

configs/longhorn-jobs/kustomization.yaml

@@ -0,0 +1,4 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - recurring-job-backup.yaml

configs/longhorn-jobs/longhorn-jobs.yaml

@@ -0,0 +1,16 @@
+apiVersion: kustomize.toolkit.fluxcd.io/v1
+kind: Kustomization
+metadata:
+  name: longhorn-jobs
+  namespace: flux-system
+spec:
+  interval: 1h
+  retryInterval: 2m
+  timeout: 5m
+  dependsOn:
+    - name: longhorn
+  sourceRef:
+    kind: ExternalArtifact
+    name: longhorn-jobs
+  prune: true
+  wait: true

configs/longhorn-jobs/recurring-job-backup.yaml

@@ -0,0 +1,10 @@
+apiVersion: longhorn.io/v1beta2
+kind: RecurringJob
+metadata:
+  name: backup
+  namespace: longhorn-system
+spec:
+  cron: "*/5 * * * *"
+  task: "backup"
+  retain: 5
+  concurrency: 2