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From Koushik Das <koushik....@citrix.com>
Subject RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
Date Wed, 16 Jan 2013 16:07:32 GMT
Looks like storage vmotion is not possible for VMs with linked clone. Check this KB http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1014249.
This is for 4.x, not sure if the latest version supports it.
 
-Koushik

> -----Original Message-----
> From: Sateesh Chodapuneedi [mailto:sateesh.chodapuneedi@citrix.com]
> Sent: Wednesday, January 16, 2013 7:29 PM
> To: cloudstack-dev@incubator.apache.org
> Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> 
> > Are we going to have a separate discussion on storage migration on
> > VMware? Is there a issue filed for VMware storage migration work?
> I am interested in VMware part of storage migration and would like to
> volunteer for it.
> Can pick this up as soon as the VMware dvSwitch support (CLOUDSTACK-657)
> feature completes.
> Would initiate a discussion/proposal soon with FS.
> 
> Regards,
> Sateesh
> 
> > -----Original Message-----
> > From: Srikanteswararao Talluri
> > [mailto:srikanteswararao.talluri@citrix.com]
> > Sent: 16 January 2013 19:10
> > To: cloudstack-dev@incubator.apache.org
> > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > Are we going to have a separate discussion on storage migration on
> > VMWare? Is there a issue filed for VMware storage migration work?
> >
> > Thanks,
> > ~Talluri
> >
> > -----Original Message-----
> > From: Chris Sears [mailto:chris.x.sears@sungard.com]
> > Sent: Wednesday, January 16, 2013 8:05 AM
> > To: cloudstack-dev@incubator.apache.org
> > Subject: Re: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> >
> > If we are thinking about VMware compatibility, there are a number of
> > factors can prevent a VM from being eligible for storage vMotion:
> > http://pubs.vmware.com/vsphere-
> >
> 50/index.jsp?topic=%2Fcom.vmware.vsphere.vcenterhost.doc_50%2FGUID-
> > A16BA123-403C-4D13-A581-DC4062E11165.html
> >
> > On vSphere versions before 5.0, having snapshots or linked clones will
> > also disqualify a VM for storage vMotion. In 5.0 and later, this is
> > not a limitation. ESX 4.x hosts running the Standard or Advanced
> > edition do not support Storage vMotion, whereas Enterprise or
> > Enterprise Plus editions do support it. Can these be accounted for
> > using the hypervisor_capabilities table?
> >
> >  - Chris
> >
> >
> >
> >
> > On Tue, Jan 15, 2013 at 7:16 PM, Alex Huang <Alex.Huang@citrix.com>
> > wrote:
> >
> > > Devdeep,
> > >
> > > I read the FS and have the following questions.
> > >
> > > - My understanding is that XenServer implements XenMotion by using
> > > snapshots and that CloudStack's snapshots can interfere with this
> > process.
> > >  This understanding might be old.  Can you confirm that this is not
> > > the case?  If it is the case, how do you plan on dealing with that?
> > > - I like to see exactly the API flow someone should execute this with.
> > > I had one question that remains unanswered which is are we planning
> > > to retrieve  a list of available hosts and storage pools to migrate to.
> > > From the listHosts API that seems to be the case but what if it is
> > > only storage pool migration?
> > > - Are we planning to add APIs to storagepool allocator to make the
> > > selection of storage pool portion work?  Is the current API enough?
> > > I see a flow for the actual migration but I don't see a flow for
> > > selecting what to migrate to.
> > > - Currently preparation on the destination host to migrate is done
> > > by management server, in the flow in the FS, it is now being done by
> > > the source agent.  What's the pros/cons of this change? I see that
> > > as an open issue on your spec and I think if we can keep the hosts
> > > from establishing contact with each other it will be best.
> > > - I like to see the full API speced out.
> > >
> > > I also like to see Hari's question answered.  Can we provide this
> > > with VmWare as well?
> > >
> > > --Alex
> > >
> > > > -----Original Message-----
> > > > From: Devdeep Singh [mailto:devdeep.singh@citrix.com]
> > > > Sent: Tuesday, January 08, 2013 1:58 AM
> > > > To: cloudstack-dev@incubator.apache.org
> > > > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver 6.1
> > > >
> > > > Hi Swamy,
> > > >
> > > > In the following scenario when a VM has disks in different
> > > > repositories,
> > > all
> > > > the virtual disks of the VM will be moved to the same destination
> > > repository.
> > > > Moving individual disks of the VM to different repositories can be
> > > > done,
> > > but
> > > > it'll involve taking inputs from the user as to which disk should
> > > > be
> > > moved to
> > > > which repository. What do you think, should this option be also
> > provided?
> > > >
> > > > Regards,
> > > > Devdeep
> > > >
> > > > > -----Original Message-----
> > > > > From: Venkata SwamyBabu Budumuru
> > > > > [mailto:venkataswamybabu.budumuru@citrix.com]
> > > > > Sent: Thursday, December 27, 2012 5:42 PM
> > > > > To: cloudstack-dev@incubator.apache.org
> > > > > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver
> > > > > 6.1
> > > > >
> > > > > Hi Devdeep,
> > > > >
> > > > > Does this also cover the following use case ?
> > > > >
> > > > > VM1 =>      ROOT    (Storage Repository 1)
> > > > >     =>      DATA-1  (Storage Repository 2)
> > > > >
> > > > > Can I migrate DATA-1 vdi alone to a different repository? Or Is
> > > > > this
> > > feature
> > > > > allowing the whole VM (including ROOT and DATA-1) to same
> > > > > destination repository?
> > > > >
> > > > > Thanks,
> > > > > SWAMY
> > > > > -----Original Message-----
> > > > > From: Hari Kannan [mailto:hari.kannan@citrix.com]
> > > > > Sent: Thursday, December 27, 2012 2:18 AM
> > > > > To: cloudstack-dev@incubator.apache.org
> > > > > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver
> > > > > 6.1
> > > > >
> > > > > Hi Devdeep,
> > > > >
> > > > > Should this discussion be expanded to cover VMware storage
> > > > > migration or
> > > > a
> > > > > different discussion - I wish to see how we can add vSphere as a
> > > supported
> > > > > platform for this feature..
> > > > >
> > > > > Hari
> > > > >
> > > > > -----Original Message-----
> > > > > From: Devdeep Singh [mailto:devdeep.singh@citrix.com]
> > > > > Sent: Wednesday, December 26, 2012 4:44 AM
> > > > > To: cloudstack-dev@incubator.apache.org
> > > > > Subject: RE: [DISCUSS] Enabling storage xenmotion on xenserver
> > > > > 6.1
> > > > >
> > > > > I have created an initial draft of the FS here
> > > > >
> > > > https://cwiki.apache.org/confluence/display/CLOUDSTACK/Enabling+St
> > > > or
> > > > ag
> > > > e+
> > > > > XenMotion+for+XenServer. I'll keep updating it based on
> > > > > XenMotion+for+discussion and
> > > > > comments.
> > > > >
> > > > > Regards,
> > > > > Devdeep
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Devdeep Singh [mailto:devdeep.singh@citrix.com]
> > > > > > Sent: Tuesday, December 18, 2012 2:10 PM
> > > > > > 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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