Hello everyone!
I found an issue during testing with the OVN-IC daemon. I noticed that
applications that interact with python-idl show an error when deleting
datapath_binding when the table index changes.
We can see the error in the logs below:
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection [-]
Datapath_Binding(uuid=UUID('498e66a2-70bc-4587-a66f-0433baf82f60'),
tunnel_key=16711683, load_balancers=[], external_ids={}) not in list:
ValueError: Datapath_Binding(uuid=UUID('498e66a2-70bc-4587-a66f-0433baf82f60'),
tunnel_key=16711683, load_balancers=[], external_ids={}) not in list
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection Traceback (most recent call last):
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovsdbapp/backend/ovs_idl/connection.py",
line 110, in run
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection self.idl.run()
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/idl.py", line 465, in run
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection
self.__parse_update(msg.params[2], OVSDB_UPDATE3)
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/idl.py", line 924, in
__parse_update
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection self.__do_parse_update(update,
version, self.tables)
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/idl.py", line 964, in
__do_parse_update
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection changes =
self.__process_update2(table, uuid, row_update)
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/idl.py", line 991, in
__process_update2
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection del table.rows[uuid]
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/custom_index.py", line 102, in
__delitem__
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection index.remove(val)
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/ovs/db/custom_index.py", line 66, in
remove
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection
self.values.remove(self.index_entry_from_row(row))
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection File
"/usr/lib/python3/dist-packages/sortedcontainers/sortedlist.py", line
2015, in remove
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection raise ValueError('{0!r} not in
list'.format(value))
2024-05-27 09:49:38.779 23596 ERROR
ovsdbapp.backend.ovs_idl.connection ValueError:
Datapath_Binding(uuid=UUID('498e66a2-70bc-4587-a66f-0433baf82f60'),
tunnel_key=16711683, load_balancers=[], external_ids={}) not in list
2024-05-27 09:49:38.779 23596 ERROR ovsdbapp.backend.ovs_idl.connection
The complete logs showing the creation, update of the tunnel_key and
deletion of the datapath_binding can be accessed at [1].
Basically the problem occurs because of the tunnel_key update when we
create a transit-switch. If the table did not have this index the problem
would not be observed.
This issue affects applications such as: neutron-server,
neutron-ovn-metadata-agent, and everyone that monitors the Datapath_Binding
table via python-idl.
I've already talked to Ilya Maximets in the openvswitch IRC channel and the
issue seems to be in the row updating process: python/ovs/db/idl.py.
Kind regards,
Roberto
[1] https://paste.openstack.org/show/bqLA7nxfk2C6loD5YlY1/
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