It seem that If you restart bare metal servers! there will be a problem after boot that the node will be register it self with a different name rather than the one used on deployment!

as the attachment shown the failed compute node is registered with new name:
=> overcloud-novacompute-2.localdomain

as it was
=> overcloud-novacompute-2

during deployment!

I check:
```
[heat-admin@overcloud-novacompute-2 ~]$ sudo hostnamectl set-hostname --transient overcloud-novacompute-2
[heat-admin@overcloud-novacompute-2 ~]$ sudo hostnamectl set-hostname  overcloud-novacompute-2
````

but after reboot the server again append localdomain to iit's hostname

Sincerely,
Ali R. Taleghani
@linkedIn