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From Alex Huang <Alex.Hu...@citrix.com>
Subject RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
Date Thu, 20 Dec 2012 13:24:52 GMT
+1

hypervisor_capabilities table is intended for this purpose.

--Alex

> -----Original Message-----
> From: Devdeep Singh [mailto:devdeep.singh@citrix.com]
> Sent: Wednesday, December 19, 2012 9:57 PM
> To: cloudstack-dev@incubator.apache.org
> Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> 
> Hi Jerry,
> 
> I don't think we need an option for "support storage motion" when adding a
> cluster. A cluster is made of homogenous hosts and cloudstack is already
> aware of the version of the hypervisor running on them. From the version it
> can infer if the storage motion is supported on it. One way to do it would be
> to update the hypervisor_capabilities table in db and have a field for
> storage_motion_supported in it. If for a particular hypervisor version the
> field is true, cloudstack will allow storage motion.
> 
> What do you think?
> 
> Regards,
> Devdeep
> 
> > -----Original Message-----
> > From: jerry jiang. 蒋维 [mailto:jerry.jiang@tyxtech.com]
> > Sent: Thursday, December 20, 2012 6:52 AM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: Re: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > Hi Devdeep,
> >
> > Shall we need to add an option -- "support storage motion" when adding a
> > cluster against one type of hypervisor, or add something in the global
> config.
> >
> > Jerry
> >
> > ----- Original Message -----
> > From: "Devdeep Singh" <devdeep.singh@citrix.com>
> > To: cloudstack-dev@incubator.apache.org
> > Sent: 星期三, 2012年 12 月 19日 下午 5:03:34
> > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > Hi Alex,
> >
> > I was planning to cover the following scenarios:
> > 1. Live migrate a VM with disks from Host A to Host B within the same
> cluster.
> > This currently works with shared storage. I was thinking of extending it to
> > support local storage too.
> > 2. Live migrate a VM from Host A to Host B across cluster. VM's disks also
> > move from one storage repository to another.
> > 3. Live migrate a VM's disks from one storage repository to another, but
> VM
> > stays in the same host. I didn't make it clear in my earlier mail, sorry about
> > that. Should it be a separate jira ticket?
> >
> > For each of them the disk offerings for each disk should be honored. That is,
> if
> > a disk is using shared storage it should be moved to a shared SR. Same
> applies
> > to disks using local storage too.
> >
> > Regards,
> > Devdeep
> >
> > > -----Original Message-----
> > > From: Alex Huang [mailto:Alex.Huang@citrix.com]
> > > Sent: Wednesday, December 19, 2012 4:56 AM
> > > To: cloudstack-dev@incubator.apache.org
> > > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> > >
> > > Devdeep,
> > >
> > > It sounds like from this that all you're doing is the ability to live
> > > migrate vms from one cluster to another cluster.
> > >
> > > Is there anything on storage migration itself?
> > >
> > > --Alex
> > >
> > > > -----Original Message-----
> > > > From: Devdeep Singh [mailto:devdeep.singh@citrix.com]
> > > > Sent: Tuesday, December 18, 2012 12:40 AM
> > > > To: cloudstack-dev@incubator.apache.org
> > > > Subject: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> > > >
> > > > Hi,
> > > >
> > > > XenServer introduced support for Storage XenMotion in the latest
> > > > version (6.1). Storage XenMotion allows VMs to be moved from one
> > > > host to another, where the VMs are not located on storage shared
> > > > between the two hosts. It provides the option to live migrate a VM's
> > > > disks along with the VM itself. It is now possible to migrate a VM
> > > > from one resource pool to another, or to migrate a VM whose disks
> > > > are on local storage, or even to migrate a VM's disks from one
> > > > storage repository to
> > > another, all while the VM is running.
> > > > More information on Storage XenMotion can be found at [1].
> > > >
> > > > I have filed a jira request [2] to track this feature. I plan to
> > > > extend the migrate vm cloudstack api call to allow migration of
> > > > instances across clusters. Do let me know your comments.
> > > >
> > > > [1] http://blogs.citrix.com/2012/08/24/storage_xenmotion/
> > > > [2] https://issues.apache.org/jira/browse/CLOUDSTACK-659
> > > >
> > > > Regards,
> > > > Devdeep
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