[Libguestfs] [PATCH v2v] v2v: Allow output to block devices (RHBZ#1868690).

[Richard W.M. Jones]

On Tue, Sep 01, 2020 at 10:08:24PM +0300, Nir Soffer wrote:
> > > I'm completely sure what the question means, but virt-v2v currently
> > > does this:
> > >
> > >   qemu-img create -f FORMAT filename
> > >   qemu-img convert -n overlay filename
> 
> This works, we also do this with file and block devices in most cases.
> 
> I was confused by:
> 
> > > > > +            (* It turns out that libguestfs's disk creation code is
> > > > > +             * considerably more flexible and easier to use than
> > > > > +             * qemu-img, so create the disk explicitly using libguestfs
> 
> I guess you don't create qcow2 image without qemu-img?
> 
> > > The new code doesn't change that for files, but the proposal does
> > > change it for devices to only this command:
> > >
> > >   qemu-img convert -n overlay device
> 
> This does not work for qcow2, since -n disable creation of the image.

I'm going to have to play with this.  It may be that we need
to drop -n when using devices.

Thanks,

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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