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Re: [Libvir] [RFC] 0/3 Add Linux Container support to libvirt



Daniel P. Berrange wrote:
On Wed, Feb 20, 2008 at 10:24:18PM -0800, Dave Leskovec wrote:
A sample XML format that can be used to define a linux container domain:
<domain type='linuxcontainer'>
   <name>TestContainer3</name>
   <container>
       <filesystem type='mount'>
           <source dir='/home/user/lxc_files/etc/'/>
           <target dir='/etc/'/>
       </filesystem>
       <filesystem type='mount'>
           <source dir='/home/user/lxc_files/var/'/>
           <target dir='/var/'/>
       </filesystem>
       <init>/usr/sbin/container_init</init>
   </container>
   <memory>65536</memory>
   <devices>
       <console tty='/dev/pts/4'/>
   </devices>
</domain>

Having thought about this all since our previous round of discussions on
the matter I'm of the opinion we should /not/ use the <container> block
for filesystem setup - it should be part of the <devices> block. This will
simplify impl for apps which already have support for dealing with devices
and hot add/remove (virDomainAttachDevice/virDomainDetachDevice). The <init> element can stay in <container> or perhap go inside an <os> block
since that's where we describe  booting for non-container virt.

That makes sense to me. I guess I'd lean towards leaving <init> in the container block since a container isn't really starting a new os image. Perhaps Dan Smith has some comments on this...

--
Best Regards,
Dave Leskovec
IBM Linux Technology Center
Open Virtualization


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