Fix catching driver exceptions

octavia_lib driver exceptions were not cought by call_provider
This patch add those exceptions, and also handles the native NotImplementedError
which does nto have all the expected fields.

Change-Id: I1a566353b7fb125184849b3a0f864d3ef6896d94

octavia/api/drivers/utils.py

@@ -16,6 +16,7 @@
 
 import six
 
+from octavia_lib.api.drivers import exceptions as lib_exceptions
 from oslo_config import cfg
 from oslo_context import context as oslo_context
 from oslo_log import log as logging
@@ -48,17 +49,28 @@ def call_provider(provider, driver_method, *args, **kwargs):
 
     try:
         return driver_method(*args, **kwargs)
-    except driver_exceptions.DriverError as e:
+    except (driver_exceptions.DriverError, lib_exceptions.DriverError) as e:
         LOG.exception("Provider '%s' raised a driver error: %s",
                       provider, e.operator_fault_string)
         raise exceptions.ProviderDriverError(prov=provider,
                                              user_msg=e.user_fault_string)
-    except (driver_exceptions.NotImplementedError, NotImplementedError) as e:
+    except (driver_exceptions.NotImplementedError,
+            lib_exceptions.NotImplementedError,
+            NotImplementedError) as e:
+        op_fault_string = (
+            e.operator_fault_string
+            if hasattr(e, "operator_fault_string")
+            else _("This feature is not implemented by this provider."))
+        usr_fault_string = (
+            e.user_fault_string
+            if hasattr(e, "user_fault_string")
+            else _("This feature is not implemented by the provider."))
         LOG.info("Provider '%s' raised a not implemented error: %s",
-                 provider, e.operator_fault_string)
+                 provider, op_fault_string)
         raise exceptions.ProviderNotImplementedError(
-            prov=provider, user_msg=e.user_fault_string)
-    except driver_exceptions.UnsupportedOptionError as e:
+            prov=provider, user_msg=usr_fault_string)
+    except (driver_exceptions.UnsupportedOptionError,
+            lib_exceptions.UnsupportedOptionError) as e:
         LOG.info("Provider '%s' raised an unsupported option error: "
                  "%s", provider, e.operator_fault_string)
         raise exceptions.ProviderUnsupportedOptionError(

octavia/tests/unit/api/drivers/test_utils.py

@@ -16,6 +16,8 @@
 
 import mock
 
+from octavia_lib.api.drivers import exceptions as lib_exceptions
+
 from octavia.api.drivers import data_models as driver_dm
 from octavia.api.drivers import exceptions as driver_exceptions
 from octavia.api.drivers import utils
@@ -39,24 +41,41 @@ def test_call_provider(self):
                             "arg1", foo="arg2")
         mock_driver_method.assert_called_with("arg1", foo="arg2")
 
-        # Test driver raising DriverError
+        # Test driver raising different types of DriverError
         mock_driver_method.side_effect = driver_exceptions.DriverError
+        self.assertRaises(exceptions.ProviderDriverError,
+                          utils.call_provider, "provider_name",
+                          mock_driver_method)
+        mock_driver_method.side_effect = lib_exceptions.DriverError
         self.assertRaises(exceptions.ProviderDriverError,
                           utils.call_provider, "provider_name",
                           mock_driver_method)
 
-        # Test driver raising NotImplementedError
+        # Test driver raising different types of NotImplementedError
         mock_driver_method.side_effect = driver_exceptions.NotImplementedError
+        self.assertRaises(exceptions.ProviderNotImplementedError,
+                          utils.call_provider, "provider_name",
+                          mock_driver_method)
+        mock_driver_method.side_effect = NotImplementedError
+        self.assertRaises(exceptions.ProviderNotImplementedError,
+                          utils.call_provider, "provider_name",
+                          mock_driver_method)
+        mock_driver_method.side_effect = lib_exceptions.NotImplementedError
         self.assertRaises(exceptions.ProviderNotImplementedError,
                           utils.call_provider, "provider_name",
                           mock_driver_method)
 
-        # Test driver raising UnsupportedOptionError
+        # Test driver raising different types of UnsupportedOptionError
         mock_driver_method.side_effect = (
             driver_exceptions.UnsupportedOptionError)
         self.assertRaises(exceptions.ProviderUnsupportedOptionError,
                           utils.call_provider, "provider_name",
                           mock_driver_method)
+        mock_driver_method.side_effect = (
+            lib_exceptions.UnsupportedOptionError)
+        self.assertRaises(exceptions.ProviderUnsupportedOptionError,
+                          utils.call_provider, "provider_name",
+                          mock_driver_method)
 
         # Test driver raising DriverError
         mock_driver_method.side_effect = Exception

releasenotes/notes/fix-driver-errors-81d33948288bf8cf.yaml

@@ -0,0 +1,4 @@
+---
+fixes:
+  - |
+    Fixed an issue where the driver errors were not caught.