I don't know if it's documented but you need add the 4.3 repo to the yum configuration on the nodes.
Regards,
Paul S.
From: Sven Achtelik <Sven.Achtelik@eps.aero> Sent: 09 October 2019 09:48 To: users <users@ovirt.org> Subject: [ovirt-users] Upgrading from oVirt-Node 4.2.8 to latest
Hi All,
is there a way to go from 4.2.8 on ovirt node to go directly to the latest version, without reinstalling the node from the iso file ? I wasn’t able to find anything in documentation on how to get this done.