Open Stack

Nice approach Stephen, thanks for the hint.

Razique Mahroua - Nuage & Co
razique.mahroua at gmail.com
Tel : +33 9 72 37 94 15



Le 8 janv. 2013 à 11:03, Stephen Gran <stephen.gran at guardian.co.uk> a écrit :

> Hi,
> 
> Yes, this is in my mind.  I see it as being in two parts:
> 
> First, there needs to be a scheduler hint and filter so that the
> scheduler knows not to schedule more VMs for the host in maintenance
> mode.
> 
> Second, there needs to be a way to ask the scheduler 'where would you
> put this VM if you were asked to do so' without making the scheduler
> actually schedule a VM creation, then use that information for live
> migration destination selection.
> 
> Both of these look relatively straightforward, but they both need
> doing :)
> 
> Cheers,
> 
> On Tue, 2013-01-08 at 10:49 +0100, Razique Mahroua wrote:
>> Hey, 
>> this is not a feature I'm aware of at the moment. But I think you can
>> do that by iterating on the instance. The command 
>> nova show $instance_id will give you the host the instance is running
>> on. You can use it to loop on a migration process. You can also use a
>> mysql request in order to retrieve all the instances running on that
>> node
>>> OS-EXT-SRV-ATTR:host   X
>> Razique Mahroua - Nuage & Co
>> razique.mahroua at gmail.com
>> Tel : +33 9 72 37 94 15
>> 
>> 
>> 
>> Le 8 janv. 2013 à 03:56, "Yuan, Ye A" <ye.a.yuan at intel.com> a écrit :
>> 
>>> Yep, it seems that our purposes are maintenance/test both.
>>> BTW, if one admin/oprator want to maintenance a host, he/she may
>>> want to relocate  all instance to another health node.
>>> If there is a command just like  ‘nova live-migrate --all’ and
>>> he/she need not care about selecting which node as destination, all
>>> works will be done by nova-scheduler.
>>> 
>>> Best wishes,
>>> Yale Yuan
>>> 
>>> From: Razique Mahroua [mailto:razique.mahroua at gmail.com] 
>>> Sent: Monday, January 07, 2013 4:56 PM
>>> To: Yuan, Ye A
>>> Cc: openstack-operators at lists.openstack.org
>>> Subject: Re: [Openstack-operators] A concept feature named
>>> 'scheduling live migration'
>>> 
>>> Hi Yuan ,
>>> would it be similar somehow to the feature which allows you to
>>> disable a service via keystone on a server?
>>> see : https://bugs.launchpad.net/keystone/+bug/1048662
>>> 
>>> Razique Mahroua - Nuage & Co
>>> razique.mahroua at gmail.com
>>> Tel : +33 9 72 37 94 15
>>> 
>>> <image001.jpg>
>>> 
>>> Le 7 janv. 2013 à 09:01, "Yuan, Ye A" <ye.a.yuan at intel.com> a
>>> écrit :
>>> 
>>> 
>>> 
>>> Hi all,
>>> There is a feature in my mind just as below:
>>> In VMware, admin can use maintenance mode to set a host to entering
>>> maintenance mode, in which the host does not allow you to deploy or
>>> power on a virtual machine until all running virtual machines are
>>> powered down or migrated to different hosts.
>>> So, if there is a feature that enable scheduler while live migration
>>> rather than use destination hostname argument in shell command ‘nova
>>> live-migration <instance-uuid> <hostname>’, OpenStack can implement
>>> maintenance mode too. In other words, operator can migrate instance
>>> without specific destination hostname.
>>> If anyone has some suggestions, please feel free to let me know.
>>> 
>>> Best wishes,
>>> Yale Yuan
>>> 
>>> _______________________________________________
>>> OpenStack-operators mailing list
>>> OpenStack-operators at lists.openstack.org
>>> http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators
>> 
>> 
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> 
> -- 
> Stephen Gran
> Senior Systems Integrator - guardian.co.uk
> 
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