Re: [libvirt] Xen: Stream-API or XML-RPC or XenAPI for managedSave, snapshots
Hello Daniel.
Am Mittwoch 27 Oktober 2010 18:05:50 schrieb Daniel P. Berrange:
> for our project I need libvirts "managed save"
functionality for Xen-3.4.
> In my implementation I tried to use Xens 'suspend' and 'resume',
which
> would nicely match, but these two functions are not available throu the
> legacy streaming API (xend-http-server, xend-unix-server), which libvirt
> seems to still use. They are available throu the XML-RPC interface and
> the XenAPI interface, which libvirt doesn't seem to use.
There is a XenAPI driver in recent libvirt. Accessible with
xenapi://hostname:port/
Thanks you for the hint, I'll take a look.
I'm not sure that 'suspend'/'resume' map to
"managed save". suspend/resume
are basically just pausing CPUs afaik, and this is already done in libvirt
APIs. Managed save is about saving guest state in a standard location
and automagically restoring from that upon guest boot.
Don't confuse libvirts naming with Xens naming:
libvirt.suspend = xen.pause
libvirt.resume = xen.unpause
libvirt.managedsave = xen.suspend
libvirt."managed start" = xen.resume
> I also will need to look at snapshots next: Has someone already
> investigated adding snapshot support to Xen(-3.4)?
Not that I'm aware of
I'll give it a try when time permits.
Sincerely
Philipp Hahn
--
Philipp Hahn Open Source Software Engineer hahn(a)univention.de
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