Re: [Libvir] [RFC] Linux-VServer support

On Wed, Oct 31, 2007 at 02:39:05PM +0100, Daniel Hokka Zakrisson wrote: > Daniel Veillard wrote: >> I looked at the code, that seems clean but I have a concern about the >> overall XML format. Could you paste a couple of examples. Also I think >> Linux-VServer and OpenVZ kind of configuration may end up with the same >> kind of limitations or differences, so I would like to try to harmonize >> both format when possible. > Currently, the XML format is really limited. Are there any docs on what > should be there, or should I just look at the other drivers? As far as > harmonizing with the OpenVZ driver, I'm fine with that, but it seems to > be pretty limited and, to some degree at least, ugly. Harmonizing the XML formats shouldn't be that hard ... We discussed the OpenVZ format there http://www.redhat.com/archives/libvir-list/2007-July/msg00347.html and around there earlier: http://www.redhat.com/archives/libvir-list/2007-March/msg00193.html For network settings http://www.redhat.com/archives/libvir-list/2007-July/msg00366.html

> Here's an example: > virsh # dumpxml etch > <domain type='vserver' id='40001'> > <name>etch</name> > <uuid>c81f40f2-7e72-606d-7d07-097c1d56a5b5</uuid> > <memory>500000</memory> > <scheduler> > <param name='fill_rate1'>100</param> > <param name='interval1'>1000</param> > <param name='fill_rate2'>25</param> > <param name='interval2'>1000</param> > <param name='idle_time'>1</param> > </scheduler> > </domain> I'm surprized there is no path or storage informations at all.

Are the parameters for the scheduler all integers ? If you really never end up with an information set more structured than that then <scheduler fill_rate1='100' interval1='1000' fill_rate2='25' interval2='1000' idle_time='1'/> would probably be simpler. The question is would other kind of scheduler use more structured parameters ? Seems to me it's not the case and that ad-hoc parsing to convert {name, value} pairs would just work.

Daniel