[Xen-users] Xen-DRBD Migration question

[Eric Laflamme <elaflamme@xxxxxxxx>]

Hi,

Let me introduce our setup so you can have a better ideas on my situation.

We have 2 physical hosts. Both have Xen for the vm and as for the disk, we have 
DRBD that sync between the two host. We would like to be able to do migration 
or live migration between host. This is possible as we have successfully done 
it.

As we can read on documentation and all is that migration and live migration is 
done with --allow-two-primaries options on DRBD. Unfortunately and for obvious 
reasons this option is too dangerous to be left on and we would like to avoid 
using this at all cost.

I've heard from a post somewhere that a migration Secondary-Primary can be 
done. Our best way to do this will be to put de VM on pause. Put the drbd disk 
on Secondary. Then migrate the vm to the second host, then put the drbd disk on 
second host to primary and unpause the vm. I've searched on google and I can't 
find anything on this method.

Is there a way to do this? Is there another way you are thinking of?

Thanks for you help,
-- 
Eric Laflamme [iWeb]
IT Architecture Specialist
Spécialiste de l'Architecture TI
http://www.iWeb.com/





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