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[olmy0414 <1953510@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

After restart of current OVN SB_DB leader, neutron_ovn_metadata_agent reconnects to new SB_DB leader, according agent`s logs.
But then, during spawn of new instances, they don`t obtain metadata from nova.
Metadata agent don`t create any ovn namespaces and related ports, there are no any errors or other info in agent`s log.
As WA, this issue can be resolved by restarting of neutron_ovn_metadata_agent.

How to reproduce it:
Restart OVN SB_DB leader and try to spawn new openstack instance.

Environment:
Openstack is deployed by kolla-ansible (v12.2.0) 
Docker - 20.10.8
Container types - ubuntu/binary

Version:
* OS: Ubuntu 20.04.3 LTS
* Kernel: 5.4.0-89-generic
* Openstack version: wallaby
* Neutron: 18.1.1
* OVS: 2.15.0
* OVN: 20.12.0

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1953510

Title:
  neutron_ovn_metadata_agent don`t work after reconnect to new OVN
  Southbound leader DB

Status in neutron:
  New

Bug description:
  After restart of current OVN SB_DB leader, neutron_ovn_metadata_agent reconnects to new SB_DB leader, according agent`s logs.
  But then, during spawn of new instances, they don`t obtain metadata from nova.
  Metadata agent don`t create any ovn namespaces and related ports, there are no any errors or other info in agent`s log.
  As WA, this issue can be resolved by restarting of neutron_ovn_metadata_agent.

  How to reproduce it:
  Restart OVN SB_DB leader and try to spawn new openstack instance.

  Environment:
  Openstack is deployed by kolla-ansible (v12.2.0) 
  Docker - 20.10.8
  Container types - ubuntu/binary

  Version:
  * OS: Ubuntu 20.04.3 LTS
  * Kernel: 5.4.0-89-generic
  * Openstack version: wallaby
  * Neutron: 18.1.1
  * OVS: 2.15.0
  * OVN: 20.12.0

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