Hi,

after digging a bit deeper, it looks like it is the problem with the qemu-guest-agent.

It does only report the hostname and nothing more. It uses this function: g_get_host_name ()

This function always returns the value in /etc/hostname and this is normally the short name of the VM without the domain part.

It looks like, that the ovirt-guest-agent made this different, but this is not working anymore with python 3.

There was a recent patch for qga -> https://bugzilla.redhat.com/show_bug.cgi?id=1845127
but this won't help me, because even when this patch would add the FQDN to oVirt back, there won't be a package for this for Ubuntu 20.04 and probably also not for RedHat/CentOS 8.

BR Florian


Von: "users" <users@ovirt.org>
An: "Sandro Bonazzola" <sbonazzo@redhat.com>
CC: "users" <users@ovirt.org>
Gesendet: Montag, 20. Juli 2020 09:06:30
Betreff: [ovirt-users] Re: qemu-guest-agent on Ubuntu doesn't report FQDN

Hi,

when setting hostnamectl set-hostname "FQDN", then engine will report the real and correct "FQDN", but this is not a good fix.

With our older Debian and Ubuntu VMs, it is working correctly, although hostname is only reporting the short hostname. hostname -f is reporting here the correct FQDN.

BR Florian


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Von: "Sandro Bonazzola" <sbonazzo@redhat.com>
An: "Florian Schmid" <fschmid@ubimet.com>, "Tomas Golembiovsky" <tgolembi@redhat.com>
CC: "users" <users@ovirt.org>
Gesendet: Freitag, 17. Juli 2020 09:21:37
Betreff: Re: [ovirt-users] qemu-guest-agent on Ubuntu doesn't report FQDN



Il giorno gio 16 lug 2020 alle ore 15:55 Florian Schmid via Users <users@ovirt.org> ha scritto:
Hi,

I have a problem with Ubuntu 20.04 VM reporting the correct FQDN to the engine.
Starting with this release, the ovirt-guest-agent is not available anymore.

Therefore, I have installed qemu-geust-agent with package defaults.

Now in the Engine, I only see the hostname under FQDN tab, instead the real full name with domain.

I'm running an oVirt environment on 4.3.8.

The VM is resolveable, forward and reverse DNS entries are working.
hostname -f shows the correct FQDN.

Even adding IP and FQDN to /etc/hosts file doesn't change anything.

qemu-guest-agent version: 4.2-3ubuntu6.3

I manage this VM via ansible 2.9 and ansible is able to get the FQDN of the VM without any issues...

What can I do here to debug my issue?
Does the engine cache the wrong result? Even after stopping and starting the VM again, engine is only showing the hostname instead of the FQDN.


+Tomas Golembiovsky can you help here?


 
Best regards,
Florian
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