Replace deprecated LOG.warn with LOG.warning

LOG.warn is deprecated. It is still used in few modules.
Replaced with non-deprecated LOG.warning.

Change-Id: Ia6acc11eca60c652844175a5742f626732e295e3
Closes-Bug: #1508442

HACKING.rst

@@ -62,6 +62,7 @@ Nova Specific Commandments
 - [N349] Check for closures in tests which are not used
 - [N350] Policy registration should be in the central location ``nova/policies/``
 - [N351] Do not use the oslo_policy.policy.Enforcer.enforce() method.
+- [N352] LOG.warn is deprecated. Enforce use of LOG.warning.
 
 Creating Unit Tests
 -------------------

nova/api/ec2/__init__.py

@@ -38,7 +38,7 @@ _DEPRECATION_MESSAGE = ('The in tree EC2 API has been removed in Mitaka. '
 class DeprecatedMiddleware(wsgi.Middleware):
     def __init__(self, *args, **kwargs):
         super(DeprecatedMiddleware, self).__init__(args[0])
-        LOG.warn(_LW(_DEPRECATED_MIDDLEWARE % type(self).__name__))  # noqa
+        LOG.warning(_LW(_DEPRECATED_MIDDLEWARE % type(self).__name__))  # noqa
 
     @webob.dec.wsgify(RequestClass=wsgi.Request)
     def __call__(self, req):

nova/compute/api.py

@@ -1752,7 +1752,7 @@ class API(base.Base):
                         self.volume_api.delete(context, bdm.volume_id)
                 except Exception as exc:
                     err_str = _LW("Ignoring volume cleanup failure due to %s")
-                    LOG.warn(err_str % exc, instance=instance)
+                    LOG.warning(err_str % exc, instance=instance)
             bdm.destroy()
 
     def _local_delete(self, context, instance, bdms, delete_type, cb):

nova/hacking/checks.py

@@ -802,6 +802,20 @@ def no_os_popen(logical_line):
                  'Replace it using subprocess module. ')
 
 
+def no_log_warn(logical_line):
+    """Disallow 'LOG.warn('
+
+    Deprecated LOG.warn(), instead use LOG.warning
+    https://bugs.launchpad.net/senlin/+bug/1508442
+
+    N352
+    """
+
+    msg = ("N352: LOG.warn is deprecated, please use LOG.warning!")
+    if "LOG.warn(" in logical_line:
+        yield (0, msg)
+
+
 def factory(register):
     register(import_no_db_in_virt)
     register(no_db_session_in_public_api)
@@ -839,4 +853,5 @@ def factory(register):
     register(check_python3_no_itervalues)
     register(cfg_help_with_enough_text)
     register(no_os_popen)
+    register(no_log_warn)
     register(CheckForUncalledTestClosure)

nova/scheduler/weights/affinity.py

@@ -60,10 +60,10 @@ class ServerGroupSoftAffinityWeigher(_SoftAffinityWeigherBase):
     def weight_multiplier(self):
         if (CONF.soft_affinity_weight_multiplier < 0 and
                 not self.warning_sent):
-            LOG.warn(_LW('For the soft_affinity_weight_multiplier only a '
-                         'positive value is meaningful as a negative value '
-                         'would mean that the affinity weigher would '
-                         'prefer non-collocating placement.'))
+            LOG.warning(_LW('For the soft_affinity_weight_multiplier only a '
+                            'positive value is meaningful as a negative value '
+                            'would mean that the affinity weigher would '
+                            'prefer non-collocating placement.'))
             self.warning_sent = True
 
         return CONF.soft_affinity_weight_multiplier
@@ -76,10 +76,10 @@ class ServerGroupSoftAntiAffinityWeigher(_SoftAffinityWeigherBase):
     def weight_multiplier(self):
         if (CONF.soft_anti_affinity_weight_multiplier < 0 and
                 not self.warning_sent):
-            LOG.warn(_LW('For the soft_anti_affinity_weight_multiplier only a '
-                         'positive value is meaningful as a negative value '
-                         'would mean that the anti-affinity weigher would '
-                         'prefer collocating placement.'))
+            LOG.warning(_LW('For the soft_anti_affinity_weight_multiplier '
+                            'only a positive value is meaningful as a '
+                            'negative value would mean that the anti-affinity '
+                            'weigher would prefer collocating placement.'))
             self.warning_sent = True
 
         return CONF.soft_anti_affinity_weight_multiplier

nova/tests/unit/scheduler/weights/test_weights_affinity.py

@@ -112,7 +112,7 @@ class SoftAffinityWeigherTestCase(SoftWeigherTestBase):
         self._do_test(policy='soft-affinity',
                       expected_weight=0.0,
                       expected_host='host3')
-        self.assertEqual(1, mock_log.warn.call_count)
+        self.assertEqual(1, mock_log.warning.call_count)
 
 
 class SoftAntiAffinityWeigherTestCase(SoftWeigherTestBase):
@@ -150,4 +150,4 @@ class SoftAntiAffinityWeigherTestCase(SoftWeigherTestBase):
         self._do_test(policy='soft-anti-affinity',
                       expected_weight=0.0,
                       expected_host='host2')
-        self.assertEqual(1, mock_log.warn.call_count)
+        self.assertEqual(1, mock_log.warning.call_count)

nova/tests/unit/test_hacking.py

@@ -747,6 +747,18 @@ class HackingTestCase(test.NoDBTestCase):
         self._assert_has_errors(code, checks.no_os_popen,
                                 expected_errors=errors)
 
+    def test_no_log_warn(self):
+        code = """
+                  LOG.warn("LOG.warn is deprecated")
+               """
+        errors = [(1, 0, 'N352')]
+        self._assert_has_errors(code, checks.no_log_warn,
+                                expected_errors=errors)
+        code = """
+                  LOG.warning("LOG.warn is deprecated")
+               """
+        self._assert_has_no_errors(code, checks.no_log_warn)
+
     def test_uncalled_closures(self):
 
         checker = checks.CheckForUncalledTestClosure

nova/tests/unit/virt/hyperv/test_migrationops.py

@@ -444,7 +444,7 @@ class MigrationOpsTestCase(test_base.HyperVBaseTestCase):
                           mock.sentinel.image_meta, True, bdi, True)
 
     @mock.patch.object(migrationops.MigrationOps, '_check_resize_vhd')
-    @mock.patch.object(migrationops.LOG, 'warn')
+    @mock.patch.object(migrationops.LOG, 'warning')
     def test_check_ephemeral_disks_multiple_eph_warn(self, mock_warn,
                                                      mock_check_resize_vhd):
         mock_instance = fake_instance.fake_instance_obj(self.context)

nova/virt/hyperv/migrationops.py

@@ -318,8 +318,8 @@ class MigrationOps(object):
         elif sum(eph['size'] for eph in ephemerals) != new_eph_gb:
             # New ephemeral size is different from the original ephemeral size
             # and there are multiple ephemerals.
-            LOG.warn(_LW("Cannot resize multiple ephemeral disks for "
-                         "instance."), instance=instance)
+            LOG.warning(_LW("Cannot resize multiple ephemeral disks for "
+                            "instance."), instance=instance)
 
         for index, eph in enumerate(ephemerals):
             eph_name = "eph%s" % index

nova/virt/libvirt/driver.py

@@ -3063,8 +3063,8 @@ class LibvirtDriver(driver.ComputeDriver):
                                   files)
 
         elif need_inject:
-            LOG.warn(_LW('File injection into a boot from volume '
-                         'instance is not supported'), instance=instance)
+            LOG.warning(_LW('File injection into a boot from volume '
+                            'instance is not supported'), instance=instance)
 
         # Lookup the filesystem type if required
         os_type_with_default = disk.get_fs_type_for_os_type(instance.os_type)
@@ -4296,9 +4296,9 @@ class LibvirtDriver(driver.ComputeDriver):
                 if self._has_uefi_support():
                     global uefi_logged
                     if not uefi_logged:
-                        LOG.warn(_LW("uefi support is without some kind of "
-                                     "functional testing and therefore "
-                                     "considered experimental."))
+                        LOG.warning(_LW("uefi support is without some kind of "
+                                        "functional testing and therefore "
+                                        "considered experimental."))
                         uefi_logged = True
                     guest.os_loader = DEFAULT_UEFI_LOADER_PATH[
                         caps.host.cpu.arch]

nova/virt/xenapi/vif.py

@@ -54,8 +54,8 @@ class XenVIFDriver(object):
         try:
             vif_ref = self._session.call_xenapi('VIF.create', vif_rec)
         except Exception as e:
-            LOG.warn(_LW("Failed to create vif, exception:%(exception)s, "
-                      "vif:%(vif)s"), {'exception': e, 'vif': vif})
+            LOG.warning(_LW("Failed to create vif, exception:%(exception)s, "
+                            "vif:%(vif)s"), {'exception': e, 'vif': vif})
             raise exception.NovaException(
                 reason=_("Failed to create vif %s") % vif)
 
@@ -74,7 +74,7 @@ class XenVIFDriver(object):
                 return
             self._session.call_xenapi('VIF.destroy', vif_ref)
         except Exception as e:
-            LOG.warn(
+            LOG.warning(
                 _LW("Fail to unplug vif:%(vif)s, exception:%(exception)s"),
                 {'vif': vif, 'exception': e}, instance=instance)
             raise exception.NovaException(
@@ -253,9 +253,9 @@ class XenAPIOpenVswitchDriver(XenVIFDriver):
             # delete the patch port pair
             self._ovs_del_port(bridge_name, patch_port1)
         except Exception as e:
-            LOG.warn(_LW("Failed to delete patch port pair for vif %(if)s,"
-                         " exception:%(exception)s"),
-                     {'if': vif, 'exception': e}, instance=instance)
+            LOG.warning(_LW("Failed to delete patch port pair for vif %(if)s,"
+                            " exception:%(exception)s"),
+                        {'if': vif, 'exception': e}, instance=instance)
             raise exception.VirtualInterfaceUnplugException(
                 reason=_("Failed to delete patch port pair"))
 
@@ -283,9 +283,9 @@ class XenAPIOpenVswitchDriver(XenVIFDriver):
                 self._delete_linux_bridge(qbr_name)
             self._ovs_del_port(CONF.xenserver.ovs_integration_bridge, qvo_name)
         except Exception as e:
-            LOG.warn(_LW("Failed to delete bridge for vif %(if)s, "
-                         "exception:%(exception)s"),
-                     {'if': vif, 'exception': e}, instance=instance)
+            LOG.warning(_LW("Failed to delete bridge for vif %(if)s, "
+                            "exception:%(exception)s"),
+                        {'if': vif, 'exception': e}, instance=instance)
             raise exception.VirtualInterfaceUnplugException(
                 reason=_("Failed to delete bridge"))
 
@@ -420,9 +420,9 @@ class XenAPIOpenVswitchDriver(XenVIFDriver):
         try:
             network_ref = self._session.network.create(network_rec)
         except Exception as e:
-            LOG.warn(_LW("Failed to create interim network for vif %(if)s, "
-                         "exception:%(exception)s"),
-                     {'if': vif, 'exception': e})
+            LOG.warning(_LW("Failed to create interim network for vif %(if)s, "
+                            "exception:%(exception)s"),
+                        {'if': vif, 'exception': e})
             raise exception.VirtualInterfacePlugException(
                 _("Failed to create the interim network for vif"))
         return network_ref

nova/virt/xenapi/vmops.py

@@ -614,8 +614,8 @@ class VMOps(object):
 
     def _handle_neutron_event_timeout(self, instance, undo_mgr):
         # We didn't get callback from Neutron within given time
-        LOG.warn(_LW('Timeout waiting for vif plugging callback'),
-                 instance=instance)
+        LOG.warning(_LW('Timeout waiting for vif plugging callback'),
+                    instance=instance)
         if CONF.vif_plugging_is_fatal:
             raise exception.VirtualInterfaceCreateException()
 
@@ -627,8 +627,8 @@ class VMOps(object):
             self._update_last_dom_id(vm_ref)
 
     def _neutron_failed_callback(self, event_name, instance):
-        LOG.warn(_LW('Neutron Reported failure on event %(event)s'),
-                {'event': event_name}, instance=instance)
+        LOG.warning(_LW('Neutron Reported failure on event %(event)s'),
+                   {'event': event_name}, instance=instance)
         if CONF.vif_plugging_is_fatal:
             raise exception.VirtualInterfaceCreateException()