Verified this bug on the following version
# rpm -qa ovirt-node
ovirt-node-3.6.1-9.0.el7ev.noarch
# cat /etc/redhat-release
Red Hat Enterprise Virtualization Hypervisor release 7.2 (20160330.0.el7ev)
Test Steps:
1. Installed RHEV-Hypervisor.
2. Setup network via DHCP.
3. After network setup, the hostname is set automatically.
4. Reboot RHEV-H
5. After reboot, login RHEV-H
6. check the hostname on TUI.
7. Does not change hostname on rhevh after reboot rhevh
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, 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://rhn.redhat.com/errata/RHBA-2016-0664.html