Hi Strahil, You can see the procedure in the link that I posted in my previous post. Look the image about this https://pasteboard.co/J9R7y4n.png Regards, Carlos

On Wed, May 27, 2020 at 7:47 PM Carlos C <ccesario(a)blueit.com.br&gt; wrote: Hi, you can read some considerations of mine here in a thread of Mid April, for both multi host and single host: https://lists.ovirt.org/archives/list/users@ovirt.org/thread/UR4IJEGRLIIO... but they didn't get great replies. possibly the developers are still consolidating a safe upgrade workflow for hosted engine... and if you read Sandro answer, for single host there is no much hope apart a reinstall. If you have a multi host lab where to experiment, you can try if my steps to mimic 3.6 -> 4.0 upgrade flow can be valid. Some of the hard points to verify are: - host reinstall in CentOS 8 based OS correctly joins the original environment oVirt environment still in 4.3 - current 4.3 engine vm can run on 4.4 host - "hosted-engine --upgrade-appliance" command exists for 4.4 - what to do if the space on hosted engine storage domain is not sufficient to contains the new engine vm together with the old one - mixed gluster versions during upgrade don't create problems Gianluca