diff --git a/kuryr_kubernetes/controller/drivers/lbaasv2.py b/kuryr_kubernetes/controller/drivers/lbaasv2.py
index f11ed4898..fd6b01df2 100644
--- a/kuryr_kubernetes/controller/drivers/lbaasv2.py
+++ b/kuryr_kubernetes/controller/drivers/lbaasv2.py
@@ -405,9 +405,9 @@ class LBaaSv2Driver(base.LBaaSDriver):
             fixed_ips = ['subnet_id=%s' % str(loadbalancer.subnet_id),
                          'ip_address=%s' % str(loadbalancer.ip)]
             ports = neutron.list_ports(fixed_ips=fixed_ips)
-        except n_exc.NeutronClientException as ex:
+        except n_exc.NeutronClientException:
             LOG.error("Port with fixed ips %s not found!", fixed_ips)
-            raise ex
+            raise
 
         if ports['ports']:
             return ports['ports'][0]
@@ -802,10 +802,9 @@ class LBaaSv2Driver(base.LBaaSDriver):
                 l7_rule.id, l7_rule.l7policy_id,
                 {'rule': {'value': new_value}})
 
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Failed to update l7_rule- id=%s ",
-                      l7_rule.id)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Failed to update l7_rule- id=%s ", l7_rule.id)
+            raise
 
     def is_pool_used_by_other_l7policies(self, l7policy, pool):
         lbaas = clients.get_loadbalancer_client()
diff --git a/kuryr_kubernetes/controller/drivers/namespace_security_groups.py b/kuryr_kubernetes/controller/drivers/namespace_security_groups.py
index 334c86095..1485f36e4 100644
--- a/kuryr_kubernetes/controller/drivers/namespace_security_groups.py
+++ b/kuryr_kubernetes/controller/drivers/namespace_security_groups.py
@@ -115,10 +115,10 @@ class NamespacePodSecurityGroupsDriver(base.PodSecurityGroupsDriver):
                         "security_group_id": sg['id']
                     }
                 })
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error creating security group for the namespace "
-                      "%s: %s", namespace, ex)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error creating security group for the namespace "
+                          "%s", namespace)
+            raise
         return {'sgId': sg['id']}
 
     def delete_sg(self, sg_id):
diff --git a/kuryr_kubernetes/controller/drivers/namespace_subnet.py b/kuryr_kubernetes/controller/drivers/namespace_subnet.py
index 2b040276b..554c3b980 100644
--- a/kuryr_kubernetes/controller/drivers/namespace_subnet.py
+++ b/kuryr_kubernetes/controller/drivers/namespace_subnet.py
@@ -138,10 +138,10 @@ class NamespacePodSubnetDriver(default_subnet.DefaultPodSubnetDriver):
             # connect the subnet to the router
             neutron.add_interface_router(router_id,
                                          {"subnet_id": neutron_subnet['id']})
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error creating neutron resources for the namespace "
-                      "%s: %s", namespace, ex)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error creating neutron resources for the namespace "
+                          "%s", namespace)
+            raise
         return {'netId': neutron_net['id'],
                 'routerId': router_id,
                 'subnetId': neutron_subnet['id'],
diff --git a/kuryr_kubernetes/controller/drivers/nested_macvlan_vif.py b/kuryr_kubernetes/controller/drivers/nested_macvlan_vif.py
index 2f050054f..8af25cef1 100755
--- a/kuryr_kubernetes/controller/drivers/nested_macvlan_vif.py
+++ b/kuryr_kubernetes/controller/drivers/nested_macvlan_vif.py
@@ -142,7 +142,7 @@ class NestedMacvlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
                 port_id,
                 {'port': {'allowed_address_pairs': address_pairs}}
             )
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error happened during updating Neutron "
-                      "port %s: %s", port_id, ex)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error happened during updating Neutron port %s",
+                          port_id)
+            raise
diff --git a/kuryr_kubernetes/controller/drivers/nested_vif.py b/kuryr_kubernetes/controller/drivers/nested_vif.py
index fd92e33f4..435afb2c2 100644
--- a/kuryr_kubernetes/controller/drivers/nested_vif.py
+++ b/kuryr_kubernetes/controller/drivers/nested_vif.py
@@ -40,10 +40,10 @@ class NestedPodVIFDriver(neutron_vif.NeutronPodVIFDriver):
             fixed_ips = ['subnet_id=%s' % str(node_subnet_id),
                          'ip_address=%s' % str(node_fixed_ip)]
             ports = neutron.list_ports(fixed_ips=fixed_ips)
-        except n_exc.NeutronClientException as ex:
+        except n_exc.NeutronClientException:
             LOG.error("Parent vm port with fixed ips %s not found!",
                       fixed_ips)
-            raise ex
+            raise
 
         if ports['ports']:
             return ports['ports'][0]
diff --git a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
index fafe121d9..3554152eb 100644
--- a/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
+++ b/kuryr_kubernetes/controller/drivers/nested_vlan_vif.py
@@ -81,9 +81,9 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
         bulk_port_rq = {'ports': [port_rq for _ in range(len(subports_info))]}
         try:
             ports = neutron.create_port(bulk_port_rq).get('ports')
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error creating bulk ports: %s", bulk_port_rq)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error creating bulk ports: %s", bulk_port_rq)
+            raise
         for index, port in enumerate(ports):
             subports_info[index]['port_id'] = port['id']
 
@@ -91,14 +91,14 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
             try:
                 neutron.trunk_add_subports(trunk_id,
                                            {'sub_ports': subports_info})
-            except n_exc.Conflict as ex:
+            except n_exc.Conflict:
                 LOG.error("vlan ids already in use on trunk")
                 for port in ports:
                     neutron.delete_port(port['id'])
-                raise ex
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error happened during subport addition to trunk")
-            raise ex
+                raise
+        except n_exc.NeutronClientException:
+            LOG.exception("Error happened during subport addition to trunk")
+            raise
 
         vifs = []
         for index, port in enumerate(ports):
@@ -185,17 +185,17 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
         while True:
             try:
                 vlan_id = self._get_vlan_id(trunk_id)
-            except n_exc.NeutronClientException as ex:
+            except n_exc.NeutronClientException:
                 LOG.error("Getting VlanID for subport on "
                           "trunk %s failed!!", trunk_id)
-                raise ex
+                raise
             subport = [{'segmentation_id': vlan_id,
                         'port_id': subport,
                        'segmentation_type': 'vlan'}]
             try:
                 neutron.trunk_add_subports(trunk_id,
                                            {'sub_ports': subport})
-            except n_exc.Conflict as ex:
+            except n_exc.Conflict:
                 if retry_count < DEFAULT_MAX_RETRY_COUNT:
                     LOG.error("vlanid already in use on trunk, "
                               "%s. Retrying...", trunk_id)
@@ -205,12 +205,12 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
                 else:
                     LOG.error(
                         "MAX retry count reached. Failed to add subport")
-                    raise ex
+                    raise
 
-            except n_exc.NeutronClientException as ex:
-                LOG.error("Error happened during subport "
-                          "addition to trunk, %s", trunk_id)
-                raise ex
+            except n_exc.NeutronClientException:
+                LOG.exception("Error happened during subport "
+                              "addition to trunk %s", trunk_id)
+                raise
             return vlan_id
 
     def _remove_subports(self, neutron, trunk_id, subports_id):
@@ -220,11 +220,10 @@ class NestedVlanPodVIFDriver(nested_vif.NestedPodVIFDriver):
         try:
             neutron.trunk_remove_subports(trunk_id,
                                           {'sub_ports': subports_body})
-        except n_exc.NeutronClientException as ex:
-            LOG.error(
-                "Error happened during subport removal from "
-                "trunk, %s", trunk_id)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error happened during subport removal from "
+                          "trunk %s", trunk_id)
+            raise
 
     def _remove_subport(self, neutron, trunk_id, subport_id):
         self._remove_subports(neutron, trunk_id, [subport_id])
diff --git a/kuryr_kubernetes/controller/drivers/neutron_vif.py b/kuryr_kubernetes/controller/drivers/neutron_vif.py
index c3fa58b33..1c314de64 100644
--- a/kuryr_kubernetes/controller/drivers/neutron_vif.py
+++ b/kuryr_kubernetes/controller/drivers/neutron_vif.py
@@ -51,9 +51,9 @@ class NeutronPodVIFDriver(base.PodVIFDriver):
         bulk_port_rq = {'ports': [rq for _ in range(num_ports)]}
         try:
             ports = neutron.create_port(bulk_port_rq).get('ports')
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Error creating bulk ports: %s", bulk_port_rq)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Error creating bulk ports: %s", bulk_port_rq)
+            raise
 
         vif_plugin = self._get_vif_plugin(ports[0])
 
diff --git a/kuryr_kubernetes/controller/drivers/public_ip.py b/kuryr_kubernetes/controller/drivers/public_ip.py
index e68468fbf..42fac7620 100644
--- a/kuryr_kubernetes/controller/drivers/public_ip.py
+++ b/kuryr_kubernetes/controller/drivers/public_ip.py
@@ -133,9 +133,10 @@ class FipPubIpDriver(BasePubIpDriver):
 
         try:
             response = neutron.create_floatingip(request)
-        except n_exc.NeutronClientException as ex:
-            LOG.error("Failed to create floating IP - netid=%s ", pub_net_id)
-            raise ex
+        except n_exc.NeutronClientException:
+            LOG.exception("Failed to create floating IP - netid=%s ",
+                          pub_net_id)
+            raise
         return response['floatingip']['id'], response[
             'floatingip']['floating_ip_address']
 
diff --git a/kuryr_kubernetes/controller/drivers/sriov.py b/kuryr_kubernetes/controller/drivers/sriov.py
index c32c9a9ac..2e3f9f5e6 100644
--- a/kuryr_kubernetes/controller/drivers/sriov.py
+++ b/kuryr_kubernetes/controller/drivers/sriov.py
@@ -74,10 +74,10 @@ class SriovVIFDriver(neutron_vif.NeutronPodVIFDriver):
         """Returns an appropriate physnet for exact subnet_id from mapping"""
         try:
             physnet = self._physnet_mapping[subnet_id]
-        except KeyError as ex:
+        except KeyError:
             LOG.error("No mapping for subnet {} in {}".format(
                 subnet_id, self._physnet_mapping))
-            raise ex
+            raise
         return physnet
 
     def _get_remaining_sriov_vfs(self, pod):
diff --git a/kuryr_kubernetes/controller/drivers/vif_pool.py b/kuryr_kubernetes/controller/drivers/vif_pool.py
index 40e7a0da2..9ad60ebe4 100644
--- a/kuryr_kubernetes/controller/drivers/vif_pool.py
+++ b/kuryr_kubernetes/controller/drivers/vif_pool.py
@@ -184,10 +184,10 @@ class BaseVIFPool(base.VIFPoolDriver):
 
         try:
             return self._get_port_from_pool(pool_key, pod, subnets)
-        except exceptions.ResourceNotReady as ex:
+        except exceptions.ResourceNotReady:
             LOG.warning("Ports pool does not have available ports!")
             eventlet.spawn(self._populate_pool, pool_key, pod, subnets)
-            raise ex
+            raise
 
     def _get_port_from_pool(self, pool_key, pod, subnets):
         raise NotImplementedError()
diff --git a/kuryr_kubernetes/controller/managers/pool.py b/kuryr_kubernetes/controller/managers/pool.py
index c0ec1ded3..d35855777 100644
--- a/kuryr_kubernetes/controller/managers/pool.py
+++ b/kuryr_kubernetes/controller/managers/pool.py
@@ -157,22 +157,22 @@ class RequestHandler(BaseHTTPRequestHandler):
             project_id = drv_project.get_project({})
             security_groups = drv_sg.get_security_groups({}, project_id)
             subnets = drv_subnets.get_subnets([], project_id)
-        except TypeError as ex:
+        except TypeError:
             LOG.error("Invalid driver type")
-            raise ex
+            raise
 
         for trunk_ip in trunk_ips:
             try:
                 drv_vif_pool.force_populate_pool(
                     trunk_ip, project_id, subnets, security_groups, num_ports)
-            except n_exc.Conflict as ex:
+            except n_exc.Conflict:
                 LOG.error("VLAN Id conflict (already in use) at trunk %s",
                           trunk_ip)
-                raise ex
-            except n_exc.NeutronClientException as ex:
-                LOG.error("Error happened during subports addition at trunk: "
-                          " %s", trunk_ip)
-                raise ex
+                raise
+            except n_exc.NeutronClientException:
+                LOG.exception("Error happened during subports addition at "
+                              "trunk: %s", trunk_ip)
+                raise
 
     def _delete_subports(self, trunk_ips):
         try:
@@ -181,9 +181,9 @@ class RequestHandler(BaseHTTPRequestHandler):
             drv_vif_pool.set_vif_driver(drv_vif)
 
             drv_vif_pool.free_pool(trunk_ips)
-        except TypeError as ex:
+        except TypeError:
             LOG.error("Invalid driver type")
-            raise ex
+            raise
 
     def _list_pools(self):
         try:
@@ -192,9 +192,9 @@ class RequestHandler(BaseHTTPRequestHandler):
             drv_vif_pool.set_vif_driver(drv_vif)
 
             available_pools = drv_vif_pool.list_pools()
-        except TypeError as ex:
+        except TypeError:
             LOG.error("Invalid driver type")
-            raise ex
+            raise
 
         pools_info = ""
         for pool_key, pool_items in available_pools.items():
@@ -211,9 +211,9 @@ class RequestHandler(BaseHTTPRequestHandler):
             drv_vif_pool.set_vif_driver(drv_vif)
 
             pool = drv_vif_pool.show_pool(pool_key)
-        except TypeError as ex:
+        except TypeError:
             LOG.error("Invalid driver type")
-            raise ex
+            raise
 
         if pool:
             pool_info = ""