[Libvir] Is it possible to add an interface to intercept the migration process?

Daniel P. Berrange berrange at redhat.com
Thu Oct 18 15:28:11 UTC 2007

On Thu, Oct 18, 2007 at 05:29:53PM +0800, Jack Meng wrote:
> Thanks for your reply.
> Actually I'm thinking about how to recognize the same storage (probably 
> external), not things on them. Sometimes storages are shared between 
> hosts but have different paths to access, e.g., for fibre channel 
> storages. So an update to the conf file is probably needed here to let 
> the dest attach 'right' storages.

Frankly this is a a solved problem already. If you need persistent device
names, don't use /dev/sdN.

With SAN you can use device mapper multipath to make your devices appear
as /dev/mpath/<WWN>  where WWN is the world world name for the LUN. Or
you can setup  udev rules to give a similar persistent name. 'man scsi_id'

Re-writing config files in Xen or libvir is just the wrong place todo this.

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