[Libvir] [RFC] Add Container support to libvirt

Dave Leskovec dlesko at linux.vnet.ibm.com
Thu Jan 3 18:49:16 UTC 2008

There are no existing tools or any being developed so we'll have to 
create it ourselves.  My plan is to store the configuration in files.  I 
was debating whether to store the information directly in XML or come up 
with some other format.  I see some advantages to storing it in XML - 
especially since there's an existing implementation (Thanks Dan!).

Best Regards,
Dave Leskovec
IBM Linux Technology Center
Open Virtualization

Daniel P. Berrange wrote:
> On Thu, Jan 03, 2008 at 10:07:39AM +0530, Shuveb Hussain wrote:
>> Hi,
>> How do you plan to maintain VM states across base machine reboots. I
>> mean just as Xen uses XenStore and OpenVZ uses config files to
>> "remember" VM configs? Are there tools being developed to do that?
>> As I see it the container infrastructure is going into 2.6.24 as a
>> generic UNIXish mechanism. It is well integrated into the kernel. So
>> I'm really wondering if there are generic tools going to be available
>> to manage the configuration of containers.
> If there are existing tools available or being developed we should use 
> them, otherwise we should just define the process ourselves.
>> I don't know if it is a good idea to use libvirt's XML files
>> themselves for container config and start containers during libvirtd
>> start-up. I'm just thinking aloud here. What was your plan?
> I think that using the libvirt XML file format would be a good initial
> starting point, since its in keeping with the QEMU/KVM driver and there's
> no other pre-existing config file format available. You could have a
> dir /etc/libvirt/[your driver] to store them in. You'd be able to re-use
> much of the code in the existing qemu driver to  this - I do similar
> re-use and file formats for the forthcoming storage API drivers.
> Dan.

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