Itamar this is true (I have noted occasional timing issues with it actually working).
But what if as the administrator I have a specific storage domain in mind that I would like to have become the master (in the case of more then two)?

@Karli
The idea is not to not have to shut down all the VM's or the engine just to maintenance a storage domain(s) that may happen to be on disparate storage servers
.
- DHC


On Thu, Aug 15, 2013 at 9:37 AM, Itamar Heim <iheim@redhat.com> wrote:
On 08/15/2013 06:18 AM, Dead Horse wrote:
Is there any method of designating which domain should be the master
storage domain or forcibly changing the role to a different storage domain?

EG: Given the following example

Storage Domain A (Master) --> NFS --> Storage Server 1
Storage Domain B --> NFS --> Storage Server 2

One wants to do maintenance to Storage Server 1 but in doing so the
Master storage domain is hosted from Storage Server 1. Thus the net
result of taking down Storage Server 1 is that one must also take down
Storage Server 2.

Thus we know we must shut down VM's from Storage Domain A to maintenance
Storage Server 1. Suppose however that VM's are running that we don't
want to shut down and are hosted from Storage Domain B via Storage Server 2.

We would want to be able to promote Storage Domain B to Master so that
we can take down Storage Domain A to do maintenance to Storage Server 1.

Once we are done with maintenance to Storage Server 1 we can bring
Storage Domain A back on line, re-designate it as Master if desired and
bring it's VM's back online.

I know I have seen this occur automatically to a point when a Storage
Domain goes missing that is the Master Domain but I have not noted any
manual method of doing so given the above scenario.

- DHC


_______________________________________________
Users mailing list
Users@ovirt.org
http://lists.ovirt.org/mailman/listinfo/users


my understanding is you can move the storage domain A which is master to maint. engine will promote storage domain B to master and everything should continue working as is.