On Thu, Jan 21, 2021 at 15:16:44 +0300, Andrey Fokin wrote:
> Yes, there is an error message.
> sudo virsh backup-begin lubuntu2 ./backup.xml
> error: XML document failed to validate against schema: Unable to validate
> doc against /usr/share/libvirt/schemas/domainbackup.rng
> Element domainbackup has extra content: disk

As I've noted in the exact mail you are replying to, I will not offer
any further assistance unless you post the question also on
libvirt-users@redhat.com list as you did with your original question.
This is to archive any discussions for future reference.

> On Thu, Jan 21, 2021 at 2:40 PM Peter Krempa <pkrempa@redhat.com> wrote:
>
> > On Thu, Jan 21, 2021 at 12:34:43 +0100, Peter Krempa wrote:
> > > On Thu, Jan 21, 2021 at 14:31:18 +0300, Andrey Fokin wrote:
> > > > Peter, thanks. I understood you message about additional configuration
> > in
> > > > domen settings. It's really interesting, and I'll going to test it as
> > well.
> > > > But could you please advise how change backup-begin command XML
> > parameters
> > > > file to start full backup process? What is wrong in my case and how to
> > fix
> > > > it? My config below.
> > > > Thanks a lot!
> > > > <domainbackup>
> > > >     <disk name='/var/lib/libvirt/images/lubuntu2.qcow2' type='file'>
> > > >     <target file='$PWD/scratch1.img'/>
> > > >     <driver type='raw'/>
> > > >     </disk>
> > > >     <disk name='/var/lib/libvirt/images/lubuntu2-1.qcow2' type='file'>
> > > >       <target file='$PWD/scratch2.img'/>
> > > >       <driver type='raw'/>
> > > >     </disk>
> > > > </domainbackup>
> > >
> > > Could you please describe what the problem is? You are getting an error?
> > > If so why didn't you paste it?
> > >
> > > I'm not going to setup a backup just to try your configuration. Please
> > > provide all information you have and describe the problem as best as
> > > possible.

Here:

> >
> > Oh, and don't drop libvirt-users from the CC-list! That way my advice
> > would not be recorded in the mailing list archives and browsable by
> > others with a possibly same problem.
> >
> > Please Re-post your query to the list AND include any information you
> > have to get a reply from me.
> >
> >
>
> --
> BRG,
>       Andrey