Re: [uml-devel] [FW: [libvirt] PATCH: Experimental User Mode Linux driver for libvirt]

["Daniel P. Berrange" <berrange@redhat.com>]

On Mon, Oct 20, 2008 at 04:24:26PM +0100, Ron Yorston wrote:
> I've now had a chance to try out the UML driver for libvirt.  My host
> platform was CentOS 5 and the guest CentOS 4, with a 2.6.27.2 kernel
> configured as 'make defconfig ARCH=um'.  I used uml:///session as an
> unprivileged user.
> 
> The CVS snapshot tarball on the libvirt.org ftp site was out of date:
> use the cvs command to fetch the source.
> 
> My host system hadn't been set up for UML before so virsh didn't work
> until I'd:
> 
>    created the directory ~/.uml (which doesn't exist if you haven't
>    run a UML instance yet);

Ah, that's useful info - I would never have noticed that :-)

>    installed the UML utilities (because libvirt checks that uml_mconsole
>    exists, even though it doesn't use it).

Yep, that check is now obsolete, so I'll remove it.

> Once I'd figured that out I was able to start a virtual machine from
> virsh and see it using the list command.
> 
> However, connecting to the guest's console was very unreliable (No
> console available for domain).  Also, all attempts to shut down the
> guest from virsh failed (libvir: Remote error :  socket closed
> unexpectedly).  Once that had happened the domain was no longer shown
> by the list command.

Ok, that's a bug I'll look into.

> BTW, is there a way to disconnect from the guest console?

We follow the telnet defaults, and use 'Ctrl+]' sequence

Thanks for taking the time to test out this initial code, hopefully I'll 
get this polished up and incorporated in the next libvirt release.

Regards,
Daniel
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