Add prometheus rules for longhorn

tasks/longhorn.yml

@@ -72,6 +72,16 @@
             csi.storage.k8s.io/fsType: ext4
             recurringJobSelector: '[{"name":"snapshot","isGroup":true}, {"name":"backup-daily","isGroup":true}]'
 
+    - name: Install Prometheus rules
+      kubernetes.core.k8s:
+        state: "present"
+        context: "{{ my_context }}"
+        namespace: "{{ storage_longhorn_namespace }}"
+        apply: yes
+        resource_definition: "{{ lookup('file', 'longhorn/' + item) | from_yaml_all }}"
+      with_items:
+        - longhorn_prometheusRules.yml
+
   when:
     - storage_longhorn_enabled
   tags: