Merge "Suppress annoying "Could not load" stevedore warnings"

neutron/common/utils.py

@@ -327,6 +327,24 @@ def replace_file(file_name, data, file_mode=0o644):
     file_utils.replace_file(file_name, data, file_mode=file_mode)
 
 
+class _SilentDriverManager(driver.DriverManager):
+    """The lamest of hacks to allow us to pass a kwarg to DriverManager parent.
+
+    DriverManager doesn't accept the warn_on_missing_entrypoint param
+    to pass to its parent on __init__ so we mirror the __init__ here and bypass
+    the one in DriverManager in order to silence the warnings.
+    TODO(kevinbenton): remove once Ia6f5f749fc2f73ca6091fa6d58506fddb058902a
+    is released or we stop supporting loading by class path.
+    """
+    def __init__(self, namespace, name):
+        p = super(driver.DriverManager, self)  # pylint: disable=bad-super-call
+        p.__init__(
+            namespace=namespace, names=[name],
+            on_load_failure_callback=self._default_on_load_failure,
+            warn_on_missing_entrypoint=False
+        )
+
+
 def load_class_by_alias_or_classname(namespace, name):
     """Load class using stevedore alias or the class name
     :param namespace: namespace where the alias is defined
@@ -340,7 +358,7 @@ def load_class_by_alias_or_classname(namespace, name):
         raise ImportError(_("Class not found."))
     try:
         # Try to resolve class by alias
-        mgr = driver.DriverManager(namespace, name)
+        mgr = _SilentDriverManager(namespace, name)
         class_to_load = mgr.driver
     except RuntimeError:
         e1_info = sys.exc_info()