Re: [libvirt-users] problem with disk virtio driver
On Wed, 2016-10-05 at 15:00 +0100, Andrei Perietanu wrote:
Hi Andrea,
Thanks for the reply;
To shed some more light on the matter I performed a few
more tests; each time doing a clean install. I installed
ubuntu14.04 as the guest OS, keeping everything else the
same.
On my custom Linux I've created ubuntu VMs before (using
ide drivers) and it all works file. This time I created the
VM using virtio disk drivers and the installation didn't
even finish. It reported a disk related error saying it's
not being able to read from /dev/vda. I restarted the
machine...same error.
Okay, that makes more sense :)
If the OS installer can access the disk, the installed OS
should as well - or at the very least it should be possible
to configure it to do so, eg. by including the relevant
kernel modules in the initramfs.
Just to make sure that I have not messed anything up,
I did the same on the ubuntu host, so installed ubuntu guest
on an ubuntu host uding the same guest config xml. This time
everything worked fine. So it looks like a problem with the
kvm virtio drivers.
I was trying to stay away from updating the qemu package
because adding the package takes a long time (usually,
because of missing dependencies), but I'm not sure I have
any other option at this point...
You should really try taking one of the Ubuntu-on-virtio
guests that you managed to create successfully on the Ubuntu
host and copying it over to the custom Linux host (guest
configuration + qcow2 disk image) to see whether it can
boot.
Failing that I guess upgrading QEMU is your best bet.
--
Andrea Bolognani / Red Hat / Virtualization