Re: gluster and kvm livemigration

[James <purpleidea@xxxxxxxxx>]

Not sure if it's related at all, but is there any chance this has anything to do with:

https://bugzilla.redhat.com/show_bug.cgi?id=987555

It came to mind as something to do with glusterfs+libvirt+migration.

HTH,
James

On Thu, Jan 16, 2014 at 5:52 AM, Bernhard Glomm <bernhard.glomm@xxxxxxxxxxx> wrote:

I experienced a strange behavior of glusterfs during livemigration

of a qemu-kvm guest 

using a 10GB file on a mirrored gluster 3.4.2 volume

(both on ubuntu 13.04)

I run

virsh migrate --verbose --live --unsafe --p2p --domain atom01 --desturi qemu+ssh://<target_ip>/system

and the migration works,

the running machine is pingable and keeps sending pings.

nevertheless, when I let the machine touch a file during migration

it stops, complaining that it's filesystem is read only (from that moment that 

migration finished)

A reboot from inside the machine failes,

machine goes down and comes up with an error

unable to write to sector xxxxxx on hd0

(than falling into the initrd).

a 

virsh destroy VM && virsh start VM

leads to a perfect running VM again,

no matter on which of the two hosts I start the machine

anybody better experience with livemigration?

any hint on a procedure how to debug that?

TIA

Bernhard

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