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I think we are running away from the original question here,
'live-migration' and 'evacuate' aim to handle different scenarios. When you
use 'live migration', you have a plan that when your compute node will
shutdown. IMHO, The only way to provide VM high availability automatically
by using 'evacuate' is using shared storage.


2014-02-22 7:58 GMT+08:00 Sangeeta Singh <singhs at yahoo-inc.com>:

> So we have to use the block-migrate flag in the live-migrate command set.
> Also which is the minimum libvirt version that support this. We use
> lbvirt-0.10.2-29
>
> Thanks for the pointer to the patch. I will check that out.
>
> Sangeeta
>
> On 2/21/14, 9:38 AM, "Joe Gordon" <joe.gordon0 at gmail.com> wrote:
>
> >On Thu, Feb 20, 2014 at 9:01 PM, Sangeeta Singh <singhs at yahoo-inc.com>
> >wrote:
> >> Hi,
> >>
> >> At my organization we do not use a shared storage for VM disks  but
> >>need to
> >> evacuate VMs  from a HV that is down or having problems to another HV.
> >>The
> >> evacuate command only allows the evacuated VM to have the base image.
> >>What I
> >> am interested in is to create a snapshot of the VM on the down HV and
> >>then
> >> be able to use the evacuate command by specifying the snapshot for the
> >> image.
> >
> >libvirt supports live migration without any shared storage. TripleO
> >has been testing it out using this patch
> >https://review.openstack.org/#/c/74600/
> >
> >>
> >> Has anyone had such a use case? Is there a command that uses snapshots
> >>in
> >> this way to recreate VM on a new HV.
> >>
> >> Thanks for the pointers.
> >>
> >> Sangeeta
> >>
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> >> OpenStack-dev at lists.openstack.org
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> >>
> >
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