Libguestfs - Aug 2014 - Re: libguest-test-tool error report

Hello Rich,

I figured out how to stop the VB services.  I then deleted the /dev/kvm.  Then I
ran the libguestfs-test-tool and it said 'OK'.  Then I ran virt-resize
and it was unhappy that /dev/kvm no longer existed.  I have attached the debug
output for your review.

Thanks,
Mark



Thanks,
Mark Husted
770-236-1242


-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com] 
Sent: Thursday, August 21, 2014 4:34 PM
To: Mark Husted (hustedm)
Cc: libguestfs@redhat.com
Subject: Re: [Libguestfs] libguest-test-tool error report

On Thu, Aug 21, 2014 at 08:20:11PM +0000, Mark Husted (hustedm)
wrote:
> Hello Rich,
>
> I am not sure if KVM ever ran.  I put VirtualBox in it because I have 
> never done virtualization before and found some instructions for VB.  
> That said, I might have naively shut something off because I didn't 
> know any better.  No VB was not running at the time.  I thought of 
> that and turned it off.  Though, I bet the services are still up.
>
> What is the standard kvm service?  I could check to see if it is 
> running properly. And we could go from there.
There's not really a "KVM service" as such.  It is a part of the
kernel is only used when you start a KVM guest.

In any case as it looks like you have VirtualBox running, my advice would be to
delete the /dev/kvm file, and try running libguestfs-test-tool and/or
virt-resize again.

  sudo rm /dev/kvm

Rich.

--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
libguestfs lets you edit virtual machines.  Supports shell scripting, bindings
from many languages.  http://libguestfs.org

On Fri, Aug 22, 2014 at 01:50:49AM +0000, Mark Husted (hustedm)
wrote:
> qemu-kvm: -drive
file=centos6.4-x86_64-gold-master-5G.img,cache=none,id=hd1,if=none:
'hd1' uses a qcow2 feature which is not supported by this qemu version:
QCOW version 3
> qemu-kvm: -drive
file=centos6.4-x86_64-gold-master-5G.img,cache=none,id=hd1,if=none: could not
open disk image centos6.4-x86_64-gold-master-5G.img: Operation not supported
The problem is that the disk image uses qcow2 features which were
added in RHEL 7.  RHEL 6 is simply unable to read or process this disk
image.

The only solution here is to update the host to RHEL 7 / CentOS 7.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v

Hello Rich,

Well, that stinks.

I really appreciate the quick responses.  Thank you for your time and effort,
too.  I will see what I can do to solve this problem some other way.  Maybe I
can virtualize my disk image maker.

Thanks,
Mark



Thanks,
Mark Husted
770-236-1242


-----Original Message-----
From: Richard W.M. Jones [mailto:rjones@redhat.com] 
Sent: Friday, August 22, 2014 3:43 AM
To: Mark Husted (hustedm)
Cc: libguestfs@redhat.com
Subject: Re: [Libguestfs] libguest-test-tool error report

On Fri, Aug 22, 2014 at 01:50:49AM +0000, Mark Husted (hustedm)
wrote:
> qemu-kvm: -drive 
> file=centos6.4-x86_64-gold-master-5G.img,cache=none,id=hd1,if=none: 
> 'hd1' uses a qcow2 feature which is not supported by this qemu 
> version: QCOW version 3
> qemu-kvm: -drive 
> file=centos6.4-x86_64-gold-master-5G.img,cache=none,id=hd1,if=none: 
> could not open disk image centos6.4-x86_64-gold-master-5G.img: 
> Operation not supported
The problem is that the disk image uses qcow2 features which were added in RHEL
7.  RHEL 6 is simply unable to read or process this disk image.

The only solution here is to update the host to RHEL 7 / CentOS 7.

Rich.

--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com virt-p2v
converts physical machines to virtual machines.  Boot with a live CD or over the
network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v