Found the answer:

Update /var/lib/vdsm/persistence/netconf/nets/ovritmgmt and reboot.

From: Matthew.Stier@fujitsu.com <Matthew.Stier@fujitsu.com>
Sent: Monday, May 10, 2021 3:18 PM
To: users@ovirt.org
Subject: [ovirt-users] Changing the ovirtmgmt IP address

Version: 4.3.10

I’m attempting to change the IP address, netmask and gateway of the ovirtmgmt NIC of a host, but everytime I reboot the host, the old address/netmask/gateway re-assert themselves.

Where do I need to make the changes, so they will be permanent?

I’ve modified /etc/sysconfig/network-scripts/ifcfg-ovirtmgmt and route-ovirtmgmt, but they don’t stick through a reboot.