[ovirt-devel] Changing the name of VDSM in oVirt 4.0.

[Dan Kenigsberg]

On Wed, Jan 27, 2016 at 09:53:52AM +0200, Nir Soffer wrote:
> 
> >
> > Also we should get rid of '/rhev/' in start of mount points IMO. How
> > about '/var/lib/ovirt-hostd/mounts/' or something like that?
> 
> We want to use /run/ovirt-host/storage/ for that, but this is hard change,
> since it breaks migration to from hosts using different vdsm versions.
> New vms expect the disks at /rhev/data-center and old vms at /rhev/data-center/
> 
> Maybe we can change disks path during migartion on the destination, but
> migrating vms to older hosts will be impossible, as the vdsm on the older
> machine does not support such manipulation.

This may be costly, but we can have have a libvirt migration hook run on
the source AND the destination hosts. The source hook would convert
everything to /rhev/data-center/ to fit old hosts; new hosts would
re-convert it to /var/run/ovirt-hostd.