[one-users] problem when migrating ubuntu

[Carlos A.]

Sources and destinations are both ubuntu 10.04.3 LTS server and ubuntu 
10.04.4 LTS server up-to-date. I am using kvm on both source and 
destination and libvirt. The details are:

$ virsh version
Compiled against library: libvir 0.9.11
Using library: libvir 0.9.11
Using API: QEMU 0.9.11
Running hypervisor: QEMU 1.0.0

The VMs are stored into their local filesystem, that is why I am doing 
offline migration.

When I was using the stock libvir and qemu-kvm (from the ubuntu 
repositories) the offline migration was always failing. Even by hand 
(using virsh commands and copying the files by hand).

Once updated libvir and qemu-kvm, offline migration fails 30-40% of 
times (estimated).

Sources and destinations are Intel, biprocessors, quadcore.


El 04/05/12 05:02, Shankhadeep Shome escribió:
> I have done a lot of migrations with VMs on Ubuntu, first give some 
> information about your source and destination, your storage back end, 
> architecture type, the source and destination host versions etc. Are 
> you running the same version of kvm,xen,libvirt on both sides? Post as 
> much as you can about the source and sink.
>
> On Thu, May 3, 2012 at 10:06 AM, Javier Fontan <jfontan at opennebula.org 
> <mailto:jfontan at opennebula.org>> wrote:
>
>     I don't really know what could be happening with those machines. If
>     this problem only happens on > 10.04 VMs then it looks like a change
>     in the distribution that makes the VM behave like that. I would also
>     try stop/resume (that does the same steps as migration) and check if
>     the same problem arises. You can also do the stop/resume test with the
>     scheduler stopped and use onevm deploy to schedule the VM to the same
>     host, this way we can check if the problem is related to some
>     configuration changes between physical nodes.
>
>     On Thu, Apr 26, 2012 at 10:04 AM, Carlos A. <caralla at upv.es
>     <mailto:caralla at upv.es>> wrote:
>     > Hi,
>     >
>     > I am experiencing some problems when migrating ubuntu based VMs
>     between
>     > hosts. The problem appeared when trying to migrate one ubuntu
>     11.04 server
>     > VM. Previous versions of ubuntu (e.g. 10.04) were not affected
>     by this
>     > problem.
>     >
>     > The VM is successfully deployed and it works properly. If I
>     suspend the VM
>     > and resume it, there is no problem. But if I migrate the VM
>     (which ONE
>     > translates into suspending the VM, copying the files to the
>     destination host
>     > and restoring the VM), the VM results useless.
>     >
>     > There appear a lot of errors in the VM, some processes (mainly
>     related to
>     > network) are tainted, etc. The problem also appears when
>     migrating a ubuntu
>     > 12.04b.
>     >
>     > Has anyone faced this issue? Has anyone some tip to solve it? (I
>     have tried
>     > to deactivate acpi as an option to the kernel, but it didn't
>     helped at all).
>     >
>     > Thank you in advance.
>     >
>     > Regards,
>     > Carlos A.
>     >
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>
>
>
>     --
>     Javier Fontán Muiños
>     Project Engineer
>     OpenNebula - The Open Source Toolkit for Data Center Virtualization
>     www.OpenNebula.org <http://www.OpenNebula.org> |
>     jfontan at opennebula.org <mailto:jfontan at opennebula.org> | @OpenNebula
>     _______________________________________________
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