Aggregated rules consumed by Castellum

We move the queries from Castellum to here. Also monitor the snapshot
usage to avoid snapshot spill to active share.

prometheus-exporters/netapp-exporter/charts/netapp-cap-exporter/aggregations/netapp-castellum.rules

@@ -0,0 +1,58 @@
+# vim: set ft=yaml:
+
+groups:
+- name: castellum_manila
+  rules:
+
+  # Case one: old provision style, where snapshot reserve is allocated AS PART OF the target share size and snapshot reserver percentage is 5.
+  # The logical space reporting/enforcement is always disabled for them.
+  # Share size = netapp_volume_total_bytes + netapp_volume_snapshot_reserved_bytes
+  # Share usage = netapp_volume_used_bytes
+  - record: netapp_volume_provision_case_one
+    expr: netapp_volume_percentage_snapshot_reserve{share_id!="", volume=~"share.*"} / 5 == 1
+
+  - record: manila_share_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_one * (netapp_volume_total_bytes + netapp_volume_snapshot_reserved_bytes)
+
+  - record: manila_share_used_bytes_for_castellum
+    expr: netapp_volume_provision_case_one * netapp_volume_used_bytes
+
+  # We don't monitor the minimal size in particular for shares in case one, they trun to other cases once resized.
+  - record: manila_share_minimal_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_one * (netapp_volume_total_bytes + netapp_volume_snapshot_reserved_bytes)
+
+  # Case two: new provision style and logical space is NOT enabled
+  # New provision style means snapshot reserve is allocated IN ADDTION TO share size, and sanpshot reserve percentage is 50
+  # To avoid snapshot spill, share's minimal size must be larger than the snapshot used size.
+  # Share size = netapp_volume_total_bytes
+  # Share usage = netapp_volume_used_bytes
+  # Share minimal size = max(netapp_volume_total_bytes, netapp_volume_snapshot_used_bytes)
+  - record: netapp_volume_provision_case_two
+    expr: (netapp_volume_percentage_snapshot_reserve{share_id!="", volume=~"share.*"} / 50 == 1) * (1 + netapp_volume_is_space_enforcement_logical == 1)
+
+  - record: manila_share_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_two * netapp_volume_total_bytes
+
+  - record: manila_share_used_bytes_for_castellum
+    expr: netapp_volume_provision_case_two * netapp_volume_used_bytes
+
+  - record: manila_share_minimal_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_two * on (share_id) group_left max({__name__=~"netapp_volume_total_bytes|netapp_volume_snapshot_used_bytes"}) by (share_id)
+
+  # Case three: new provision style and logical space enabled
+  # To avoid snapshot spill, share's minimal size must be larger than the snapshot used size.
+  # Share size = netapp_volume_total_bytes
+  # Share usage = netapp_volume_logical_used_bytes
+  # Share minimal size = max(netapp_volume_total_bytes, netapp_volume_snapshot_used_bytes)
+  - record: netapp_volume_provision_case_three
+    expr: (netapp_volume_percentage_snapshot_reserve{share_id!="", volume=~"share.*"} / 50 == 1) * (netapp_volume_is_space_enforcement_logical == 1)
+
+  - record: manila_share_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_three * netapp_volume_total_bytes
+
+  - record: manila_share_used_bytes_for_castellum
+    expr: netapp_volume_provision_case_three * netapp_volume_logical_used_bytes
+
+  - record: manila_share_minimal_size_bytes_for_castellum
+    expr: netapp_volume_provision_case_three * on (share_id) group_left max({__name__=~"netapp_volume_total_bytes|netapp_volume_snapshot_used_bytes"}) by (share_id)
+