Support to force delete instance

Change-Id: I20802f199ef943244f27a842743434e1c84c79e5

releasenotes/notes/ussuri-03-force-delete-instance-1643114c2e1b11ea.yaml

@@ -0,0 +1,8 @@
+---
+features:
+  - |
+    Support to force delete instance. By default, only allowed by admin user.
+
+    .. code-block:: console
+
+        openstack database instance delete --force <instance>

troveclient/osc/v1/database_instances.py

@@ -177,13 +177,21 @@ class DeleteDatabaseInstance(base.TroveDeleter):
             metavar='instance',
             help='Id or name of instance(s).'
         )
+        parser.add_argument(
+            '--force',
+            action="store_true",
+            default=False,
+            help=_('Force delete the instance, will reset the instance status '
+                   'before deleting.'),
+        )
         return parser
 
     def take_action(self, parsed_args):
         db_instances = self.app.client_manager.database.instances
 
         # Used for batch deletion
-        self.delete_func = db_instances.delete
+        self.delete_func = (db_instances.force_delete
+                            if parsed_args.force else db_instances.delete)
         self.resource = 'database instance'
 
         ids = []

troveclient/tests/osc/v1/test_database_instances.py

@@ -158,6 +158,17 @@ class TestDatabaseInstanceDelete(TestInstances):
         calls = [mock.call(instance_1), mock.call(instance_2)]
         self.instance_client.delete.assert_has_calls(calls)
 
+    @mock.patch("troveclient.utils.get_resource_id_by_name")
+    def test_instance_force_delete(self, mock_getid):
+        mock_getid.return_value = "fake_uuid"
+
+        args = ['instance1', '--force']
+        parsed_args = self.check_parser(self.cmd, args, [('force', True)])
+        self.cmd.take_action(parsed_args)
+
+        mock_getid.assert_called_once_with(self.instance_client, "instance1")
+        self.instance_client.force_delete.assert_called_with('fake_uuid')
+
 
 class TestDatabaseInstanceCreate(TestInstances):