[Libguestfs] supermin appliances and host connectivity

Richard W.M. Jones rjones at redhat.com
Wed Jun 1 16:45:40 UTC 2011

On Wed, Jun 01, 2011 at 03:10:20PM +0200, Joel Uckelman wrote:
> I think I've fished out the command-line options you send to qemu-kvm:
> qemu-kvm -kernel kernel -initrd initrd -hda root -device virtio-serial
> -serial stdio -chardev
> socket,path=/home/uckelman/projects/lightbox/supermin/foo,id=channel0,name=org.libguestfs.channel.0
> Thanks for that.
> I can definitely run my appliance this way if I already have something
> listening on that FIFO before launching qemu. (E.g.: socat
> UNIX-LISTEN:foo STDOUT) The piece of the puzzle I'm still missing is
> how to connect to the socket from the guest side. I was expecting to
> find something in the guest's /dev, but I have the same entries there
> as before.

It seems likely that you either don't have udev running in the guest
or your guest kernel is too old.  IIRC it has to be >= 2.6.36 in order
to support virtio-serial.


Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
virt-top is 'top' for virtual machines.  Tiny program with many
powerful monitoring features, net stats, disk stats, logging, etc.

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