Most probably it's related to ssh.
Did you alter your sshd config ?

oVirt needs password-less access to root.

Best Regards,
Strahil Nikolov

On Sat, May 29, 2021 at 14:30, lejeczek via Users
<users@ovirt.org> wrote:
Hi guys

I'm trying to install HE on a KVM host and installer cannot
get pass this:

[ ERROR ] OSError: [Errno 24] Too many open files
[ ERROR ] fatal: [localhost]: FAILED! => {"msg": "Unexpected
failure during module execution.", "stdout": ""}
[ INFO  ] TASK [ovirt.ovirt.hosted_engine_setup : Sync on
engine machine]
[ ERROR ] fatal: [localhost]: FAILED! => {"msg": "Using a
SSH password instead of a key is not possible because Host
Key checking is enabled and sshpass does not support this. 
Please add this host's fingerprint to your known_hosts file
to manage this host."}
[ ERROR ] Failed to execute stage 'Closing up': Failed
executing ansible-playbook
[ INFO  ] Stage: Clean up

KVM itself should be satisfying in terms of requirements, as
a setup of a HE version from 'master' repo worked previously
on it.

Any ideas & thoughts shared, on what is that cryptic error
message saying and how to troubleshoot I'll very much
appreciate.
many thanks, L.
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