[Users] Designate Master Storage Domain

[Itamar Heim]

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
>
>
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>

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.