[Users] Designate Master Storage Domain

[Jim Kinney]

I am all for the "mix and match" idea of storage.


On Thu, Aug 15, 2013 at 1:30 PM, Itamar Heim <iheim at redhat.com> wrote:

> On 08/15/2013 07:32 PM, Dead Horse wrote:
>
>> +1 to Adding a "Make Master Storage Domain Button" ;-)
>>
>
> actually, not sure i'm for this.
> if anything, we want to get rid of the master storage domain going forward
> to make the storage domains autonomous, allowing to mix and match storage
> types, local and shared storage, etc...
>
> rhev-m may reconstruct the master storage domain on any of your SDs over
> time automatically
>
>
>>
>> On Thu, Aug 15, 2013 at 11:09 AM, Liron Aravot <laravot at redhat.com
>> <mailto:laravot at redhat.com>> wrote:
>>
>>
>>
>>     ----- Original Message -----
>>      > From: "Dead Horse" <deadhorseconsulting at gmail.com
>>     <mailto:deadhorseconsulting@**gmail.com<deadhorseconsulting at gmail.com>
>> >>
>>      > To: "Itamar Heim" <iheim at redhat.com <mailto:iheim at redhat.com>>
>>      > Cc: "<users at ovirt.org <mailto:users at ovirt.org>>" <users at ovirt.org
>>     <mailto: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
>>     <mailto: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
>>      >
>>      >
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>>
>>      > 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.
>>      >
>>      >
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>>      >
>>
>>
>>
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-- 
-- 
James P. Kinney III
*
*Every time you stop a school, you will have to build a jail. What you gain
at one end you lose at the other. It's like feeding a dog on his own tail.
It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
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