mgr/prometheus: fix warning of possibly unbound variables

Signed-off-by: Patrick Seidensal <pseidensal@suse.com>
(cherry picked from commit 0fdbdb45dcec57e6e108edfdbea6e6a661f34a7a)

diff --git a/src/pybind/mgr/prometheus/module.py b/src/pybind/mgr/prometheus/module.py
index 53e0a98149f44afe82a5995b8c62214043dceceb..ebb353fe2a08cd2248595cfccbb317cc64654530 100644 (file)
--- a/src/pybind/mgr/prometheus/module.py
+++ b/src/pybind/mgr/prometheus/module.py
@@ -778,6 +778,8 @@ 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(