[one-users] unable to attach disks to VMs: 'driver' expects a driver name and other error messages

[Shankhadeep Shome]

raw is the type of image, vda is a virtio block device, they are not
related directly, that is a vda device can be raw or other formats.


On Sat, Jun 1, 2013 at 7:13 AM, Lars Buitinck <L.J.Buitinck at uva.nl> wrote:

> 2013/5/31  <users-request at lists.opennebula.org>:
> > Date: Fri, 31 May 2013 15:28:26 +0200
> > From: Lars Buitinck <L.J.Buitinck at uva.nl>
> > To: users at lists.opennebula.org
> > Subject: [one-users] unable to attach disks to VMs: 'driver' expects a
> >         driver name and other error messages
> > Message-ID:
> >         <
> CAKz-xUfiAt1ZzShu8OHqa-97OS8wmfOvHobEbQ-MACMn5K_jAA at mail.gmail.com>
> > Content-Type: text/plain; charset=UTF-8
> >
> > I've been struggling for hours now trying to attach disk images to
> > running VMs in OpenNebula. While for two of my five VMs, this has
> > actually worked, it's failing for the three remaining ones.
> >
> > I've successfully created images, using DEV_PREFIX=vd; this is the
> > setup that eventually worked for two of the VMs. When I try to attach
> > these disks, I get various different error messages, depending on the
> > VM.
>
> [snip]
>
> > But filling in a DRIVER in the image template doesn't work either.
> > Making a new VM with either a "raw" or other driver also fails. (I
> > must admit I don't understand what this "driver" field really does and
> > I couldn't find anything in the documentation.)
>
> Just to let you know, I've resolved the problem by setting DRIVER to
> "raw" at image construction and filling in the TARGET field with
> "vdb". Strangely, the disks still emerge as /dev/vda, which is
> actually convenient for sysad purposes, but still somewhat surprising.
>
> --
> Lars Buitinck
> Scientific programmer, ILPS
> University of Amsterdam
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> Users at lists.opennebula.org
> http://lists.opennebula.org/listinfo.cgi/users-opennebula.org
>
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