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[do3meli <1999582@xxxxxxxxxxxxxxxxxx>]

Hi Rodolfo

Thanks for the heads up. I have verified and it seems correct that
neutron openvswitch agent reports the port correctly as "down:

2022-12-13 18:52:49.053 2955524 INFO
neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent
[req-149353dc-53f3-48ca-97e1-ec4f47dc56e5 - - - - -] Port
6c167efe-3a55-46d1-baf1-4962b3bc387f is being migrated to host
computeXXX.

2022-12-13 18:52:49.053 2955524 INFO
neutron.plugins.ml2.drivers.openvswitch.agent.ovs_neutron_agent
[req-149353dc-53f3-48ca-97e1-ec4f47dc56e5 - - - - -] Port
6c167efe-3a55-46d1-baf1-4962b3bc387f updated. Details: {'device':
'6c167efe-3a55-46d1-baf1-4962b3bc387f', 'device_id':
'5d270ee8-76aa-46d8-9ebc-09f51de1b5d9', 'network_id':
'4ea4469f-4791-4483-9b10-6b01a0857989', 'port_id':
'6c167efe-3a55-46d1-baf1-4962b3bc387f', 'mac_address':
'fa:16:3e:8c:5c:b8', 'admin_state_up': False, 'status': 'DOWN',
'network_type': 'vlan', 'segmentation_id': 102, 'physical_network':
'provider', 'fixed_ips': [{'subnet_id':
'a2831e83-8a5a-4f02-ae09-2eb674089026', 'ip_address': '185.XXX.XX.X'}],
'device_owner': 'compute:XXXXX', 'allowed_address_pairs': [],
'port_security_enabled': True, 'qos_policy_id': None,
'network_qos_policy_id': None, 'profile': {'os_vif_delegation': True,
'migrating_to': 'computeXXX'}, 'vif_type': 'ovs', 'vnic_type': 'normal',
'security_groups': ['4096f1f0-094a-4f7d-b539-8cb387f70763'],
'migrating_to': 'computeXXX'}


This leads me to think that there is a problem in nova that does not correctly handle the "admin port down" case when doing live migrations. Therefore i have added nova as affected project to this bug report. It would be great to have somebody from nova verify this.

** Also affects: nova
   Importance: Undecided
       Status: New

** Tags added: live-migration

-- 
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Engineering Team, which is subscribed to OpenStack Compute (nova).
https://bugs.launchpad.net/bugs/1999582

Title:
  vm live migration not working when port is admin down

Status in neutron:
  Invalid
Status in OpenStack Compute (nova):
  New

Bug description:
  having a vm with a provider network port that has it's status set to
  "admin down" won't let this vm migrate successfully. the source
  compute host will abort the migration with the following message:

  Timed out waiting for events: [('network-vif-plugged',
  '8066f303-a72c-4784-9fc0-de5f7d8a993f'), ('network-vif-plugged',
  '6c167efe-3a55-46d1-baf1-4962b3bc387f')]. If these timeouts are a
  persistent issue it could mean the networking backend on host
  computeXXX does not support sending these events unless there are port
  binding host changes which does not happen at this point in the live
  migration process. You may need to disable the
  live_migration_wait_for_vif_plug option on host computeXXX.:
  eventlet.timeout.Timeout: 300 seconds

  setting the port admin status up and re-running the life migration let
  the vm successfully complete. Therefore the logic for the
  live_migration_wait_for_vif_plug settings should be adjusted to take
  into consideration if a port should be up or not.

  Environment:

  - Ubuntu 20.04.5 with Cloud Archive Repositories in version 19.4.0-0ubuntu1~cloud0 on Xena branch
  - Using ML2 with OVS on physical provider network

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