[NetApp] add max_over_subscription_ratio to pool stats

The max_over_subscription_ratio configuration, which can be set per
share back end, is now visible in scheduler-stats/pools/detail API.

Change-Id: Idc0eb39d91cf572a480443a5f68f9d3bac8a6342
Closes-Bug: #1877063

manila/share/drivers/netapp/dataontap/cluster_mode/lib_base.py

@@ -340,6 +340,7 @@ class NetAppCmodeFileStorageLibrary(object):
         for aggr_name in sorted(aggregates):
 
             reserved_percentage = self.configuration.reserved_share_percentage
+            max_over_ratio = self.configuration.max_over_subscription_ratio
 
             total_capacity_gb = na_utils.round_down(float(
                 aggr_space[aggr_name].get('total', 0)) / units.Gi)
@@ -360,6 +361,7 @@ class NetAppCmodeFileStorageLibrary(object):
                 'allocated_capacity_gb': allocated_capacity_gb,
                 'qos': qos_support,
                 'reserved_percentage': reserved_percentage,
+                'max_over_subscription_ratio': max_over_ratio,
                 'dedupe': [True, False],
                 'compression': [True, False],
                 'netapp_flexvol_encryption': netapp_flexvol_encryption,

manila/tests/share/drivers/netapp/dataontap/fakes.py

@@ -680,6 +680,7 @@ POOLS = [
         'free_capacity_gb': 1.1,
         'allocated_capacity_gb': 2.2,
         'reserved_percentage': 5,
+        'max_over_subscription_ratio': 2.0,
         'dedupe': [True, False],
         'compression': [True, False],
         'thin_provisioning': [True, False],
@@ -702,6 +703,7 @@ POOLS = [
         'free_capacity_gb': 2.0,
         'allocated_capacity_gb': 4.0,
         'reserved_percentage': 5,
+        'max_over_subscription_ratio': 2.0,
         'dedupe': [True, False],
         'compression': [True, False],
         'thin_provisioning': [True, False],
@@ -727,6 +729,7 @@ POOLS_VSERVER_CREDS = [
         'free_capacity_gb': 1.1,
         'allocated_capacity_gb': 0.0,
         'reserved_percentage': 5,
+        'max_over_subscription_ratio': 2.0,
         'dedupe': [True, False],
         'compression': [True, False],
         'thin_provisioning': [True, False],
@@ -746,6 +749,7 @@ POOLS_VSERVER_CREDS = [
         'free_capacity_gb': 2.0,
         'allocated_capacity_gb': 0.0,
         'reserved_percentage': 5,
+        'max_over_subscription_ratio': 2.0,
         'dedupe': [True, False],
         'compression': [True, False],
         'thin_provisioning': [True, False],
@@ -1317,6 +1321,7 @@ def get_config_cmode():
     config = na_fakes.create_configuration_cmode()
     config.local_conf.set_override('share_backend_name', BACKEND_NAME)
     config.reserved_share_percentage = 5
+    config.max_over_subscription_ratio = 2.0
     config.netapp_login = CLIENT_KWARGS['username']
     config.netapp_password = CLIENT_KWARGS['password']
     config.netapp_server_hostname = CLIENT_KWARGS['hostname']

releasenotes/notes/netapp-cdot-add-max-over-subscription-ratio-pool-stats-eea763b3b9b3ba7d.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    The NetApp cDOT driver now reports the max_over_subscription_ratio
+    configuration, which can be set per share back end, via
+    scheduler-stats/pools/detail API.