As a part of BZ2019807 we need to reload NetworkManager instead of restarting it. Unfortunately we have use nmcli, which is not available on RHEL 7 host, so the host deploy process fails
So the nmcli general reload conf is supported only from el8, we need to adjust the code to do the service restart on el7 then.
rhel 7.9 based host successfully added to engine 4.4.10-2
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (RHV Manager (ovirt-engine) [ovirt-4.4.10]), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHBA-2022:0461