Public bug reported: Ever since this change in Newton: https://review.openstack.org/#/c/275073/
Nova will set the 'migrating_to' field in the port's binding:profile dict for live migration to fix an issue with L3 connectivity with DVR (see the details in bug 1456073). The problem is the code that sets that up in nova here: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/network/neutronv2/api.py#L433 Is called from non-live-migration operations: evacuate: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/compute/manager.py#L3206 resize: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/compute/manager.py#L4497 This does not seem to be an issue with neutron even though there is code in neutron that keys off this field to determine if a live migration is being performed: https://github.com/openstack/neutron/blob/a388701ddfe628e9a5bd16a78422164799b11ef8/neutron/plugins/ml2/drivers/macvtap/mech_driver/mech_macvtap.py#L69 At worst it's a functional bug which can cause issues with migrating servers using DVR and some types of networking backends. At least it's unnecessary nova<>neutron API traffic during non-live migration move operations. ** Affects: nova Importance: Low Status: Triaged ** Tags: evacuate neutron resize -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1814837 Title: port binding:profile migrating_to should only be set during live migration Status in OpenStack Compute (nova): Triaged Bug description: Ever since this change in Newton: https://review.openstack.org/#/c/275073/ Nova will set the 'migrating_to' field in the port's binding:profile dict for live migration to fix an issue with L3 connectivity with DVR (see the details in bug 1456073). The problem is the code that sets that up in nova here: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/network/neutronv2/api.py#L433 Is called from non-live-migration operations: evacuate: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/compute/manager.py#L3206 resize: https://github.com/openstack/nova/blob/75d52556066cf56b33e61bc4a80b6dc81b846c07/nova/compute/manager.py#L4497 This does not seem to be an issue with neutron even though there is code in neutron that keys off this field to determine if a live migration is being performed: https://github.com/openstack/neutron/blob/a388701ddfe628e9a5bd16a78422164799b11ef8/neutron/plugins/ml2/drivers/macvtap/mech_driver/mech_macvtap.py#L69 At worst it's a functional bug which can cause issues with migrating servers using DVR and some types of networking backends. At least it's unnecessary nova<>neutron API traffic during non-live migration move operations. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1814837/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
