Thanks, that's very helpful - I'll close this one :)
** Changed in: neutron
Status: Incomplete => Invalid
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https://bugs.launchpad.net/bugs/2081161
Title:
KeyError: 'ip_version' on processing dhcp opts
Status in neutron:
Invalid
Bug description:
release: 2023.1
I'm using the networking-mlnx and ovn mechanism drivers and there is a
bad interaction with some of the DHCP options networking-mlnx adds:
```
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
[req-d65bacb9-884c-4b3d-9e08-3c2f1e192998
req-1a500bb1-5615-491a-ba85-bfe41257a17e f5c0b82c90544eae800299324a3637b8
3ffaeaac91904e0ca02f7aca7c00b81a - - default default] Mechanism driver 'ovn'
failed in update_port_postcommit: KeyError: 'ip_version'
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers Traceback (most
recent call last):
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/managers.py",
line 497, in _call_on_drivers
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
getattr(driver.obj, method_name)(context)
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py",
line 886, in update_port_postcommit
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
self._ovn_update_port(context.plugin_context, port, original_port,
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/mech_driver.py",
line 767, in _ovn_update_port
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
self._ovn_client.update_port(plugin_context, port,
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py",
line 644, in update_port
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers port_info,
external_ids = self.get_external_ids_from_port(port)
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py",
line 510, in get_external_ids_from_port
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers port_info =
self._get_port_options(port)
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py",
line 344, in _get_port_options
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
dhcpv4_options = self._get_port_dhcp_options(port, const.IP_VERSION_4)
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/plugins/ml2/drivers/ovn/mech_driver/ovsdb/ovn_client.py",
line 219, in _get_port_dhcp_options
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
lsp_dhcp_disabled, lsp_dhcp_opts = utils.get_lsp_dhcp_opts(
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers File
"/var/lib/kolla/venv/lib64/python3.9/site-packages/neutron/common/ovn/utils.py",
line 274, in get_lsp_dhcp_opts
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers if
edo['ip_version'] != ip_version:
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers KeyError:
'ip_version'
2024-08-15 12:14:56.800 37 ERROR neutron.plugins.ml2.managers
2024-08-15 12:14:56.801 37 ERROR neutron.plugins.ml2.plugin
[req-d65bacb9-884c-4b3d-9e08-3c2f1e192998
req-1a500bb1-5615-491a-ba85-bfe41257a17e f5c0b82c90544eae800299324a3637b8
3ffaeaac91904e0ca02f7aca7c00b81a - - default default]
mechanism_manager.update_port_postcommit failed for port
242c3591-e60d-41d4-811e-c8d0a838158e:
neutron.plugins.ml2.common.exceptions.MechanismDriverError
```
I'm not an expert, but I believe the ovn driver would not even attempt
bind this port so shouldn't be concerned with dhcp options added by
networking-mlnx. I've partially worked around this issue by putting
mlnx_infiniband after ovn in the mechanism driver list, but believe I
still see this exception on port binding failure.
I known networking-mlnx is a little unmaintained and may be doing
something weird, but it does seem like the ovn mechanism driver could
handle this case more gracefully.
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