mgr/dashboard: Fix cherrypy static content URL prefix config

Fixes: https://tracker.ceph.com/issues/25067
Signed-off-by: Ricardo Marques <rimarques@suse.com>
(cherry picked from commit a36eff1e51928777f9efda62da723902257f9d48)

diff --git a/src/pybind/mgr/dashboard/module.py b/src/pybind/mgr/dashboard/module.py
index 87ecdcb672da9ca8880c239f0cb97aa64bf28af4..a3934e93a8b29f3eb531cb8f3cd52afb1c2434ec 100644 (file)
--- a/src/pybind/mgr/dashboard/module.py
+++ b/src/pybind/mgr/dashboard/module.py
@@ -276,7 +276,7 @@ class Module(MgrModule, SSLCherryPyConfig):
         mapper = generate_routes(self.url_prefix)
 
         config = {
-            '{}/'.format(self.url_prefix): {
+            self.url_prefix or '/': {
                 'tools.staticdir.on': True,
                 'tools.staticdir.dir': self.get_frontend_path(),
                 'tools.staticdir.index': 'index.html'