Set hostname of guest during installation time

[Michal Prívozník]

On 27. 3. 2020 17:23, john doe wrote:
> On 3/27/2020 5:13 PM, Michal Prívozník wrote:
>> On 27. 3. 2020 16:48, Michal Prívozník wrote:
>>> On 27. 3. 2020 14:57, john doe wrote:
>>>> Hi,
>>>>
>>>> I would like to set the hostname when installing a guest, with the below
>>>> command the hostname is not set to 'try06' in the guest:
>>>>
>>>> virt-install --name=try06 --graphic none --pxe --network bridge=virbr0
>>>
>>> This is the name of the guest registered in libvirt. I don't think that
>>> virt-install has wired up setting hostname, but it looks like it can do
>>> it. I mean, use --name for both libvirt name and guest hostname.
>>
>> On the other hand, users might want to set it to something else. So we
>> really should have a separate argument for that. Anyway, I've reported
>> it to virt-install developers:
>>
>> https://github.com/virt-manager/virt-manager/issues/94
>>
> 
> Many thanks for your answer and for passing it along.
> 
> I agree, an option to trigger this behavior is best.
> 
> After executing the above command and before the hostname step, the
> following workaround seems to work:
> 
> $ virsh net-dhcp-leases default
>  Expiry Time           MAC address         Protocol   IP address
>   Hostname   Client ID or DUID
> -----------------------------------------------------------------------------------------------------------------------------------------------
>  2020-03-27 18:03:36   52:54:00:9d:d1:e7   ipv4       192.168.122.45/24
>   -      ff:00:9d:d1:e7:00:01:00:01:26:10:e0:58:52:54:00:9d:d1:e7
> 
> $ virsh net-update default add ip-dhcp-host "<host
> mac='52:54:00:9d:d1:e7' name='try06' ip='192.168.122.45'/>"
> 
> 
> What I am not sure about is how to predetermine the MAC address of the
> guest before starting the installer?

You can switch the steps and generate a MAC address yourself, then
update the network and then specify it on virt-install cmd line.

Or even better, do not bother with any of this and use libvirt-nss plugin:

  https://libvirt.org/nss.html

Michal