My understanding, is that OLVM/oVirt use the root password to push it’s SSH credentials at first login.  Once that is done, all other SSH access is though those credentials.

You should be able to change the root password without issue.

From: Tommy Sway <sz_cuitao@163.com>
Sent: Friday, September 17, 2021 4:12 AM
To: users@ovirt.org
Subject: [ovirt-users] about the password of the engine host and worker KVM hosts

I have successfully installed and deployed OLVM, where the Engine uses a separate physical server and the virtual machines work on other worker servers.

Due to the company's internal security policy, I now need to change the root user password for all servers. Is that ok?

Will cluster running be affected?

Thanks!