it is used for the config drive that all its needed for. specifically so we can set the hostname in the configdrive by appending the dhcp domain https://github.com/openstack/nova/blob/7f4afc1a0fbc721731a0c88bb91cada8f4e4ed11/nova/api/metadata/base.py#L529-L535
if we dont set it on the compute hosts then it will set the host name without the domain.
it is used for the config drive that all its needed for. /github. com/openstack/ nova/blob/ 7f4afc1a0fbc721 731a0c88bb91cad a8f4e4ed11/ nova/api/ metadata/ base.py# L529-L535
specifically so we can set the hostname in the configdrive by appending the dhcp domain
https:/
if we dont set it on the compute hosts then it will set the host name without the domain.