Re: [Xen-users] creating a domU with a particular UUID with xen-unstable

["Andrew D. Ball" <aball@us.ibm.com>]

It looks like I can do this by starting a domain from an SXP directly 
instead of a Python-based configuration.

If I use a suitable algorithm for generating UUIDs, I should be able to 
guarantee at least an extremely low probability of UUID collisions 
across an entire farm of systems running Xen.  I will read up some more 
on the ISO UUID algorithm commonly used by hardware manufacturers.  I 
don't trust it quite yet, but it does seem that this is in line with its 
purpose.

I'm not really fond of the behavior of domain name collisions.  I don't 
want to have to query some sort of farm-wide database to see if a domain 
name isn't being used to guarantee uniqueness, but I want to be able to 
guarantee that I'll never have a domain name collision when doing a live 
migration of a domU to another system.  They are nice to have around for 
being easily readable by humans though.

Thanks for your help.

Andrew

Anthony Liguori wrote:
> Andrew D. Ball wrote:
> 
>> Is it possible with xen-unstable (hopefully soon to be Xen 3.0) to 
>> create a domU with a particular UUID?  I don't want the UUID for a 
>> domain to change when I destroy it and create it again from the same 
>> configuration.
> 
> 
> You could always make the domain's name it's UUID.
> 
> Regards,
> 
> Anthony Liguori
> 
>> This doesn't necessarily have to have anything to do with xenstore's 
>> being persistent, it could just involve a configuration option similar 
>> to the one for virtual NICs where MAC addresses can be assigned 
>> explicitly if desired but will be pseudo-randomly generated otherwise.
>>
>> Thanks for your help.
>>
>> Andrew
>>
>>
>>
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> 
>