I don't think it's possible, but you can try to install 4.3.10 which will allow you to bump the cluster version.<div><br></div><div>Why don't you reinstall one of the nodes on EL8 with 4.4 and then reinstall the second one ?</div><div><br></div><div>Best Regards,</div><div>Strahil Nikolov<br> <br> <blockquote style="margin: 0 0 20px 0;"> <div style="font-family:Roboto, sans-serif; color:#6D00F6;"> <div>On Thu, Apr 28, 2022 at 12:53, Andrei Verovski</div><div>&lt;andreil1@starlett.lv&gt; wrote:</div> </div> <div style="padding: 10px 0 0 20px; margin: 10px 0 0 0; border-left: 1px solid #6D00F6;"> <div dir="ltr">Hi,<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">I have quite old nodes from early 4.x era (with CentOS 7.6, cluster compatibility 4.2 level), and oVirt Engine 4.4.<br></div><div dir="ltr">2 nodes have ovirt-release42.<br></div><div dir="ltr">Upgrade to oVirt Engine 4.5 engine required cluster compatibility &gt;= 4.3 level.<br></div><div dir="ltr"><br></div><div dir="ltr">Nodes have been installed with stock CentOS 7.6, not oVirt node image, their upgrade is quite problematic right now.<br></div><div dir="ltr"><br></div><div dir="ltr">Is it possible to upgrade to cluster compatibility 4.3 while having old 4.2 nodes?<br></div><div dir="ltr"><br></div><div dir="ltr">Thanks in advance.<br></div><div dir="ltr">Andrei<br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">Users mailing list -- <a ymailto="mailto:users@ovirt.org" href="mailto:users@ovirt.org">users@ovirt.org</a><br></div><div dir="ltr">To unsubscribe send an email to <a ymailto="mailto:users-leave@ovirt.org" href="mailto:users-leave@ovirt.org">users-leave@ovirt.org</a><br></div><div dir="ltr">Privacy Statement: <a href="https://www.ovirt.org/privacy-policy.html" target="_blank">https://www.ovirt.org/privacy-policy.html</a><br></div><div dir="ltr">oVirt Code of Conduct: <a href="https://www.ovirt.org/community/about/community-guidelines/" target="_blank">https://www.ovirt.org/community/about/community-guidelines/</a><br></div><div dir="ltr">List Archives: <a href="https://lists.ovirt.org/archives/list/users@ovirt.org/message/L4GODZKGD7WO4OHH3LRPXHDPSDH4C3IK/" target="_blank">https://lists.ovirt.org/archives/list/users@ovirt.org/message/L4GODZKGD7WO4OHH3LRPXHDPSDH4C3IK/</a><br></div> </div> </blockquote></div>