mgr/volumes: fix placement default value

Fixes: https://tracker.ceph.com/issues/44244
Signed-off-by: Sage Weil <sage@redhat.com>

diff --git a/src/pybind/mgr/volumes/module.py b/src/pybind/mgr/volumes/module.py
index ae3033b7bc6661c33f5dd0fb1f39cd7f6f9d8cf0..f12112961674f95f5f6ce88559070772e64ec333 100644 (file)
--- a/src/pybind/mgr/volumes/module.py
+++ b/src/pybind/mgr/volumes/module.py
@@ -243,7 +243,7 @@ class Module(orchestrator.OrchestratorClientMixin, MgrModule):
 
     def _cmd_fs_volume_create(self, inbuf, cmd):
         vol_id = cmd['name']
-        placement = cmd.get('placement', None)
+        placement = cmd.get('placement', '')
         return self.vc.create_fs_volume(vol_id, placement)
 
     def _cmd_fs_volume_rm(self, inbuf, cmd):