[ovirt-users] Renaming hosted engine

[Nikolai Sednev]

No, I did not tested that. 
I did not renamed my HE. 



Thanks in advance. 

Best regards, 
Nikolai 
____________________ 
Nikolai Sednev 
Senior Quality Engineer at Compute team 
Red Hat Israel 
34 Jerusalem Road, 
Ra'anana, Israel 43501 

Tel: +972 9 7692043 
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Email: nsednev at redhat.com 
IRC: nsednev 

----- Original Message -----

From: "Yedidyah Bar David" <didi at redhat.com> 
To: "Luca 'remix_tj' Lorenzetto" <lorenzetto.luca at gmail.com>, "Nikolai Sednev" <nsednev at redhat.com> 
Cc: "users" <users at ovirt.org> 
Sent: Wednesday, December 7, 2016 1:06:00 PM 
Subject: Re: [ovirt-users] Renaming hosted engine 

On Wed, Dec 7, 2016 at 12:20 PM, Luca 'remix_tj' Lorenzetto 
<lorenzetto.luca at gmail.com> wrote: 
> Hello, 
> 
> On Wed, Dec 7, 2016 at 10:53 AM, Yedidyah Bar David <didi at redhat.com> wrote: 
> [cut] 
>> 
>> If you have another host, you can migrate all VMs to the other host, 
>> move current to maintenance, remove it, then add it with the new name 
>> you want. You might have to also clean up the shared meta-data, see: 
>> 
>> https://www.ovirt.org/documentation/how-to/hosted-engine/#remove-old-host-from-the-metadata-whiteboard 
>> 
> 
> from your response i understood that i was using the wrong terms for 
> explaining my need. 
> 
> What i'm willing to change the fqdn of the engine vm running on hosted 
> engine. I've seen that the deployment procedure asked for it, so i 
> think somewhere this value is used for configurations. 

Indeed. I do not think we have a tested procedure for renaming 
a hosted-engine. 

The rename tool [1] will not handle this. 

Nikolai - IIRC we discussed this some months ago. Did you eventually 
test this? 

You can run the tool, but then ha-agent will fail to connect to the engine 
to see that it's alive. 

To answer your question: This is saved in a file called hosted-engine.conf, 
as 'fqdn='. Until 3.5, this file was only saved locally on each host in 
/etc/hosted-engine. Since 3.6, it's also saved in the shared storage. 
You can try extracting it from the shared storage, edit, then update. 
See e.g. [2] for how to do this, but that one is for a different file 
(the answer file, also saved in both /etc and the shared storage). 

I now read parts of the relevant code, and AFAICT we do not use fqdn 
from the shared storage, only from the one in /etc. So it might be 
enough to change there (although you risk that this will change in 
a future version). 

Please open a bug about this. If you try the above, please tell us if 
it worked or not and what problems/errors you got. Thanks! 

[1] https://www.ovirt.org/documentation/how-to/networking/changing-engine-hostname/ 
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1366879#c23 

> 
> Thank you anyway for the link, 
> 
> Luca 
> 
> -- 
> "E' assurdo impiegare gli uomini di intelligenza eccellente per fare 
> calcoli che potrebbero essere affidati a chiunque se si usassero delle 
> macchine" 
> Gottfried Wilhelm von Leibnitz, Filosofo e Matematico (1646-1716) 
> 
> "Internet è la più grande biblioteca del mondo. 
> Ma il problema è che i libri sono tutti sparsi sul pavimento" 
> John Allen Paulos, Matematico (1945-vivente) 
> 
> Luca 'remix_tj' Lorenzetto, http://www.remixtj.net , <lorenzetto.luca at gmail.com> 



-- 
Didi 

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