Florian Dahm via FreeIPA-users wrote:
> Hallo!
> 
> I have been trying to install FreeIPA server and keep hitting this error 
> message:
> 
> "ipapython.admintool: ERROR    The host name [hostname of the local machine] 
> does not match the primary host name [hostname of ANOTHER machine]. Please 
> check /etc/hosts or DNS name resolution"
> 
> I am at my wits' end. The machine has two NICs, one public (which shall serve 
> the FreeIPA UI) and one private (which shall serve the actual domain 
> services). /etc/hosts has entries for the public name for both IPv4 and v6. 
> No amount of fiddling with parameters to ipa-server-install lets me get past 
> this issue. Most frustratingly, the second hostname in the message is from a 
> wholly different machine, the only connection between the two is a private 
> VLAN on the second NIC of the local machine. I have no clue where it gets 
> that hostname from in the first place.
> 
> /var/log/ipaserver-install.log gives me:
> " [...]
> File "/usr/lib/python2.7/site-packages/ipaserver/install/server/install.py", 
> line 455, in install_check
>     raise ScriptError(e)
> 
> 2019-07-27T09:13:33Z DEBUG The ipa-server-install command failed, exception: 
> ScriptError: The host name epicurus.cds-infra does not match the primary host 
> name lucan.cds-infra.de. Please check /etc/hosts or DNS name resolution
> [...]"
> 
> I tried under both Fedora 30 and CentOS 7.6, with no difference. Has anyone 
> encountered a similar issue, and hopefully solved it?
>

There should be a lot more logging about this.

It is comparing the hostname passed in or detected to the value of
socket.gethostbyaddr(host_name).

Is the FQDN of the machine the name that IPA will use?

rob

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