[Users] Designate Master Storage Domain

[Dead Horse]

+1 to Adding a "Make Master Storage Domain Button" ;-)


On Thu, Aug 15, 2013 at 11:09 AM, Liron Aravot <laravot at redhat.com> wrote:

>
>
> ----- Original Message -----
> > From: "Dead Horse" <deadhorseconsulting at gmail.com>
> > To: "Itamar Heim" <iheim at redhat.com>
> > Cc: "<users at ovirt.org>" <users at ovirt.org>
> > Sent: Thursday, August 15, 2013 6:46:00 PM
> > Subject: Re: [Users] Designate Master Storage Domain
> >
> > 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)?
>
> In that case - you could reinitialize the pool using unattached domain
> (you chose which one) - this domain will become the new master.
> 1. Create new unattached domain/Detach the domain that you want to be the
> master from the pool (if possible)
> 2. Move all the pool domain to maintenance (the master should be put to
> maintenance last to avoid reconstructing to another domain).
> 3. Right click on the data center, chose reinitialize storage pool - you
> can chose which domain do you want to be the master from the unattached
> domains.
>
> The other option is manual db intervention :)
> Possibly we could add a possibility to manually change the master domain,
> same as was added for the spm ("Make SPM" button that was added recently).
>
>
> >
> > @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 at 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 at 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.
> >
> >
> > _______________________________________________
> > Users mailing list
> > Users at ovirt.org
> > http://lists.ovirt.org/mailman/listinfo/users
> >
>
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