Re-home exceptions to common/exceptions.py

Change-Id: I2db28dc025f256b5b818ddbfd88a818388d09af0

ovn_octavia_provider/common/exceptions.py

@@ -14,6 +14,7 @@
 #    under the License.
 
 from neutron_lib import exceptions as n_exc
+from octavia_lib.api.drivers import exceptions as driver_exceptions
 
 from ovn_octavia_provider.i18n import _
 
@@ -22,3 +23,10 @@ class RevisionConflict(n_exc.NeutronException):
     message = _('OVN revision number for %(resource_id)s (type: '
                 '%(resource_type)s) is equal or higher than the given '
                 'resource. Skipping update')
+
+
+class IPVersionsMixingNotSupportedError(
+        driver_exceptions.UnsupportedOptionError):
+    user_fault_string = _('OVN provider does not support mixing IPv4/IPv6 '
+                          'configuration within the same Load Balancer.')
+    operator_fault_string = user_fault_string

ovn_octavia_provider/driver.py

@@ -39,6 +39,7 @@ from ovn_octavia_provider.common import config as ovn_conf
 # TODO(mjozefcz): Start consuming const and utils
 # from neutron-lib once released.
 from ovn_octavia_provider.common import constants as ovn_const
+from ovn_octavia_provider.common import exceptions as ovn_exc
 from ovn_octavia_provider.common import utils
 from ovn_octavia_provider.i18n import _
 from ovn_octavia_provider.ovsdb import impl_idl_ovn
@@ -81,13 +82,6 @@ OVN_NATIVE_LB_ALGORITHMS = [constants.LB_ALGORITHM_SOURCE_IP_PORT, ]
 EXCEPTION_MSG = "Exception occurred during %s"
 
 
-class IPVersionsMixingNotSupportedError(
-        driver_exceptions.UnsupportedOptionError):
-    user_fault_string = _('OVN provider does not support mixing IPv4/IPv6 '
-                          'configuration within the same Load Balancer.')
-    operator_fault_string = user_fault_string
-
-
 def get_neutron_client():
     try:
         return clients.NeutronAuth(
@@ -2077,7 +2071,7 @@ class OvnProviderDriver(driver_base.ProviderDriver):
                 user_fault_string=msg,
                 operator_fault_string=msg)
         if self._ip_version_differs(member):
-            raise IPVersionsMixingNotSupportedError()
+            raise ovn_exc.IPVersionsMixingNotSupportedError()
         admin_state_up = member.admin_state_up
         if (isinstance(member.subnet_id, o_datamodels.UnsetType) or
                 not member.subnet_id):
@@ -2139,7 +2133,7 @@ class OvnProviderDriver(driver_base.ProviderDriver):
                 user_fault_string=msg,
                 operator_fault_string=msg)
         if new_member.address and self._ip_version_differs(new_member):
-            raise IPVersionsMixingNotSupportedError()
+            raise ovn_exc.IPVersionsMixingNotSupportedError()
         request_info = {'id': new_member.member_id,
                         'address': old_member.address,
                         'protocol_port': old_member.protocol_port,