[Libguestfs] [PATCH v2v] v2v: Allow output to block devices (RHBZ#1868690).
Richard W.M. Jones
rjones at redhat.com
Tue Sep 1 19:38:32 UTC 2020
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
Read my programming and virtualization blog: http://rwmj.wordpress.com
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