Re: [libvirt] [RFC] relax offline migration requirements to --xml
On Thu, Apr 21, 2016 at 17:52:07 +0300, Nikolay Shirokovskiy wrote:
Hi, all.
I'm thinking of leveraging of existing migration API to support offline clone
in virtuozzo. AFAIK offline migration is basically just copying of domain
config to the other side and defining it there. It is even possible to slightly
mutate it thru options like --dname or --xml but mutation restrictions are the same
as in case of active domain migration which is quite tight for an offline clone
case. In case of clone we want to change uuid, MACs etc. Well the changes
itself could be done by mgmt but this requires that libvirt drops the
restictive checks for --xml option. What is your evaluation of this approach?
Yeah, the ABI stability check for user-supplied XML is probably too
strict for offline migration. However, offline migration doesn't really
do anything but transferring the domain XML to the destination host and
if you supply your own XML, it's easier and much more powerful (no
restrictions at all) to directly define the domain on the destination
host using your modified XML.
Jirka