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 > [email protected] > Tel : +33 9 72 37 94 15 > > > > Le 8 janv. 2013 à 03:56, "Yuan, Ye A" <[email protected]> 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:[email protected]] > > Sent: Monday, January 07, 2013 4:56 PM > > To: Yuan, Ye A > > Cc: [email protected] > > 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 > > [email protected] > > Tel : +33 9 72 37 94 15 > > > > <image001.jpg> > > > > Le 7 janv. 2013 à 09:01, "Yuan, Ye A" <[email protected]> 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 > > [email protected] > > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-operators > > > _______________________________________________ > Mailing list: https://launchpad.net/~openstack > Post to : [email protected] > Unsubscribe : https://launchpad.net/~openstack > More help : https://help.launchpad.net/ListHelp -- Stephen Gran Senior Systems Integrator - guardian.co.uk Please consider the environment before printing this email. ------------------------------------------------------------------ Visit guardian.co.uk - website of the year www.guardian.co.uk www.observer.co.uk www.guardiannews.com On your mobile, visit m.guardian.co.uk or download the Guardian iPhone app www.guardian.co.uk/iphone and iPad edition www.guardian.co.uk/iPad Save up to 37% by subscribing to the Guardian and Observer - choose the papers you want and get full digital access. Visit guardian.co.uk/subscribe --------------------------------------------------------------------- This e-mail and all attachments are confidential and may also be privileged. If you are not the named recipient, please notify the sender and delete the e-mail and all attachments immediately. Do not disclose the contents to another person. You may not use the information for any purpose, or store, or copy, it in any way. Guardian News & Media Limited is not liable for any computer viruses or other material transmitted with or as part of this e-mail. You should employ virus checking software. Guardian News & Media Limited A member of Guardian Media Group plc Registered Office PO Box 68164 Kings Place 90 York Way London N1P 2AP Registered in England Number 908396 _______________________________________________ Mailing list: https://launchpad.net/~openstack Post to : [email protected] Unsubscribe : https://launchpad.net/~openstack More help : https://help.launchpad.net/ListHelp
