Re: [libvirt-users] how to detect if qemu supports live disk snapshot
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
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