libvirt users - Apr 2016 - Use virt-* tools from within container?

Hi, all.  I've set up an LXC container for various Openstack admin 
chores, and now I'm being asked to have it used for importing qcow2 
images -- on which we want to run utilities like virt-sparsify and 
virt-sysprep, first.  Sadly, when I do that, it dies horribly, e.g.,

root@openstack-cli:/tmp# virt-sysprep -a cloud-image.qcow2
Examining the guest ...
libguestfs: warning: supermin-helper -f checksum returned a short string
Fatal error: exception Guestfs.Error("cannot find any suitable 
libguestfs supermin, fixed or old-style appliance on LIBGUESTFS_PATH 
(search path: /usr/lib/guestfs)")


Is there a way around this?  Or is the answer, "Don't do that in a 
container"?

Thanks!

-Ken

P.S.  /usr/lib/guestfs -- the only part of the error I can easily look 
into -- has more stuff in it than the system that does process virt-* 
commands properly.  Here's what's there: excludelist  make.sh  
packagelist  supermin.d

On Wed, Apr 27, 2016 at 07:09:11PM -0400, Ken D'Ambrosio
wrote:
> Hi, all.  I've set up an LXC container for various Openstack admin
chores,
> and now I'm being asked to have it used for importing qcow2 images --
on
> which we want to run utilities like virt-sparsify and virt-sysprep, first.
> Sadly, when I do that, it dies horribly, e.g.,
> 
> root@openstack-cli:/tmp# virt-sysprep -a cloud-image.qcow2
> Examining the guest ...
> libguestfs: warning: supermin-helper -f checksum returned a short string
> Fatal error: exception Guestfs.Error("cannot find any suitable
libguestfs
> supermin, fixed or old-style appliance on LIBGUESTFS_PATH (search path:
> /usr/lib/guestfs)")
> 
> 
> Is there a way around this?  Or is the answer, "Don't do that in a
> container"?
Assuming you have the right RPMs installed within the container it
ought to work just fine. If you want it to be fast, make sure you
configure the container to also allow /dev/kvm device access. I
run an entire openstack deployment inside a container which is far
more complex than just libguestfs :-)


Regards,
Daniel
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