Hello,
yes, root login is opened.
No, I didn't make changes to the sshd_config
The fact is that this issue happens from time to time. Let me give you more details:
When the hosts go in "non responsive state", probably due to network errors,
they remain in this state for a few hours. In the meantime, if we try to reach the hosts
and the vm, we can connect to them correctly.
So in my opinion, the ovirt manager, when it is not able to reach the hypervisors, set the
server in the non responsive state, but it has issues when he tries to reconnect to it and
to bring them up again.