mgr/prometheus: fix warning of possibly unbound variables

Signed-off-by: Patrick Seidensal <pseidensal@suse.com>

diff --git a/src/pybind/mgr/prometheus/module.py b/src/pybind/mgr/prometheus/module.py
index 981a1ab89ba3314ba8bf2113e97ccc3688b96431..6e267f02bca3c8aaf0ea6c981f7f9cd2b7e6aedc 100644 (file)
--- a/src/pybind/mgr/prometheus/module.py
+++ b/src/pybind/mgr/prometheus/module.py
@@ -777,6 +777,8 @@ class Module(MgrModule):
                 ))
 
             osd_dev_node = None
+            osd_wal_dev_node = ''
+            osd_db_dev_node = ''
             if obj_store == "filestore":
                 # collect filestore backend device
                 osd_dev_node = osd_metadata.get(