[Users] How to efficiently share templates between datacenters which have local storages?

[Itamar Heim]

On 11/22/2012 03:18 PM, Adam Tkáč wrote:
> 2012/11/22 Itamar Heim <iheim at redhat.com>:
>> On 11/19/2012 08:02 PM, Adam Tkáč wrote:
>>>
>>> Hello,
>>>
>>> I use oVirt 3.1.0.
>>>
>>> Does anyone have an idea how to efficiently share VM templates between
>>> multiple datacenters which use local storages for VM images? I tried
>>> two methods:
>>>
>>> 1. Add another cluster to "local storage datacenter" which failed with
>>> oVirt error that this isn't allowed
>>> 2. Tried to create new NFS data domain but this isn't possible because
>>> oVirt interface allows me to create only NFS export or NFS ISO domains
>>> (not data domain)
>>>
>>> So every time when I would like to use some template in other
>>> datacenter, I have to export it to export domain and then import it in
>>> other datacenter. This isn't optimal way because templates are
>>> duplicated over datacenters. Duplication causes problems - when I want
>>> to update template, I must update it and copy to all datacenters
>>> again. And, of course, duplicated templates consume disk space.
>>
>>
>> how did you envision doing this without consuming disk space? a shared NFS
>> domain for the templates?
>
> Exactly. To be more precise, I imagine either NFS/Fibre Channel/iSCSI
> should be possible. However as I wrote above, I'm unable to create NFS
> data domain when datacenter uses "local" storage.

true, this is still a limitation we need to resolve (and plan to), but 
not immediate

>
> Regards, A
>
>>>
>>> "Non-oVirt" solution, when I manually export part of local storage of
>>> one datacenter with templates via NFS and then mount it in other
>>> datacenters is also ok but I'm not sure if it will work.
>>
>>
>>