Comment 2 for bug 1999677

Hi Rodolfo

* we are using openstack focal-ussuri with ovn 22.03
  neutron 2:16.4.2-0ubuntu4
  ovn: 22.03.0-0ubuntu1~cloud0

* We decommissioned the node removing entirely from the cloud after the machine
  powered off for hardware issues

* I can't share the agent list as it contains hostnames of running nodes in the production cloud

* ovn-controller was not stopped gracefully as the machine failed unexpectedly

After the machine died it remained in agent list and OVN Controller Gateway agent remained with State up and Alive :-) until we removed the machine manually from the OVN SB DB with:

ovn-sbctl chassis-del <hostname>

and then restarted neutron-servers.

Also openstack neutron agent delete is not supported for OVN controller agents.