On 01/13/2014 04:57 AM, Francesco Romani wrote:
After reading from the docs, it seems that libvirt doesn't reports yet this information about the hypervisor in the capabilities XML: http://libvirt.org/formatcaps.html
a quick test against libvirt 1.1.3 (qemu 1.6.1) on Fedora 20 seems to confirm (see XML dump below[1]).
Correct. It might indeed be a useful addition to the capability XML.
So, if I'm not mistaken, looks like the only way to test for the support in QEMU is to actually request a snapshot and see what happens. Is this right?
Unfortunately true for the moment.
If this is correct, I would like to craft and propose a patch to libvirt to export this information, maybe into a form of some kind of warning list/blacklist: disk snapshotting it is supposed to be available, but this particular QEMU doesn't support it.
Capability XML would be the proper way to expose this. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org