PowerMax Driver - Fix for deleting replication group

Fix to suspend the storage group you are about to delete
and then add a force flag to delete the volume pairs within
the storage group.

Change-Id: I66387dbf516109a31821b368f67491dc4b854c8a

cinder/tests/unit/volume/drivers/dell_emc/powermax/test_powermax_common.py

@@ -2350,6 +2350,8 @@ class PowerMaxCommonTest(test.TestCase):
             array_id, volume, device_id, srp, target_slo, target_workload,
             volume_name, new_type, extra_specs)
 
+    @mock.patch.object(rest.PowerMaxRest, 'get_storage_group_rdf_group_state',
+                       return_value=['activebias'])
     @mock.patch.object(common.PowerMaxCommon,
                        '_post_retype_srdf_protect_storage_group',
                        return_value=(True, True, True))
@@ -2369,7 +2371,7 @@ class PowerMaxCommonTest(test.TestCase):
                        return_value=True)
     def test_cleanup_on_migrate_failure(
             self, mck_rep_enabled, mck_retype_remote, mck_break, mck_resume,
-            mck_retype, mck_configure, mck_get_vname, mck_protect):
+            mck_retype, mck_configure, mck_get_vname, mck_protect, mck_states):
         rdf_pair_broken = True
         rdf_pair_created = True
         vol_retyped = True

cinder/tests/unit/volume/drivers/dell_emc/powermax/test_powermax_replication.py

@@ -1449,6 +1449,11 @@ class PowerMaxReplicationTest(test.TestCase):
             self.common.cleanup_rdf_device_pair, array, rdf_group_no,
             device_id, extra_specs)
 
+    @mock.patch.object(rest.PowerMaxRest, 'get_storage_group_rdf_group_state',
+                       return_value=['activebias'])
+    @mock.patch.object(
+        rest.PowerMaxRest, 'is_volume_in_storagegroup',
+        return_value=True)
     @mock.patch.object(
         rest.PowerMaxRest, 'srdf_resume_replication')
     @mock.patch.object(
@@ -1484,7 +1489,8 @@ class PowerMaxReplicationTest(test.TestCase):
     def test_cleanup_rdf_device_pair(
             self, mck_get_rdf, mck_get_rep, mck_get_rdf_pair, mck_get_sg_list,
             mck_wait, mck_get_mgmt_grp, mck_get_num_vols, mck_suspend,
-            mck_srdf_remove, mck_remove, mck_delete, mck_cleanup, mck_resume):
+            mck_srdf_remove, mck_remove, mck_delete, mck_cleanup, mck_resume,
+            mock_is_vol, mock_states):
         array = self.data.array
         rdf_group_no = self.data.rdf_group_no_1
         device_id = self.data.device_id

cinder/volume/drivers/dell_emc/powermax/common.py

@@ -5819,14 +5819,13 @@ class PowerMaxCommon(object):
         group_details = self.rest.get_storage_group_rep(
             array, vol_grp_name)
         if group_details and group_details.get('rdf', False):
-            if extra_specs['rep_mode'] in [utils.REP_ASYNC, utils.REP_METRO]:
-                self.rest.srdf_suspend_replication(
-                    array, vol_grp_name, rdf_group_no, extra_specs)
-        if volume_device_ids:
-            LOG.debug("Deleting remote replication for group %(sg)s", {
-                'sg': vol_grp_name})
-            self.rest.delete_storagegroup_rdf(array, vol_grp_name,
-                                              rdf_group_no)
+            self.rest.srdf_suspend_replication(
+                array, vol_grp_name, rdf_group_no, extra_specs)
+            if volume_device_ids:
+                LOG.debug("Deleting remote replication for group %(sg)s", {
+                    'sg': vol_grp_name})
+                self.rest.delete_storagegroup_rdf(array, vol_grp_name,
+                                                  rdf_group_no)
         remote_device_ids = self._get_members_of_volume_group(
             remote_array, vol_grp_name)
         # Remove volumes from remote replication group
@@ -5841,7 +5840,8 @@ class PowerMaxCommon(object):
             self._delete_from_srp(
                 remote_array, device_id, "group vol", extra_specs)
         # Once all volumes are deleted then delete the SG
-        self.rest.delete_storage_group(remote_array, vol_grp_name)
+        if self.rest.get_storage_group(remote_array, vol_grp_name):
+            self.rest.delete_storage_group(remote_array, vol_grp_name)
 
     def create_group_snapshot(self, context, group_snapshot, snapshots):
         """Creates a generic volume group snapshot.

cinder/volume/drivers/dell_emc/powermax/rest.py

@@ -3231,8 +3231,10 @@ class PowerMaxRest(object):
         resource_name = ('%(sg_name)s/rdf_group/%(rdf_num)s'
                          % {'sg_name': storagegroup_name,
                             'rdf_num': rdf_group_num})
+        query_params = {'force': 'true'}
         self.delete_resource(
-            array, REPLICATION, 'storagegroup', resource_name=resource_name)
+            array, REPLICATION, 'storagegroup', resource_name=resource_name,
+            params=query_params)
 
     def list_pagination(self, list_info):
         """Process lists under or over the maxPageSize

releasenotes/notes/powermax-delete-replication-group-76656e96262201d5.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    PowerMax driver:
+    Fix to suspend the storage group you are about to delete
+    and then add a force flag to delete the volume pairs within
+    the storage group.