Thanks Peter! But is possible change XML configuration towards will be possible to do full (push) backup?
On Wed, Jan 20, 2021 at 9:08 PM Peter Krempa <pkre...@redhat.com> wrote: > On Wed, Jan 20, 2021 at 20:49:49 +0300, Andrey Fokin wrote: > > Colleagues, could you please advise what a problem could be in XML file > in > > case of: > > virsh backup-begin lubuntu2 ./backup.xml > > > > where backup.xml - > > <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> > > snip ... > > You forgot to add what you are observing, but I presume: > > 'operation unsupported: incremental backup is not supported yet' > > Unfortunately it's what it says on the tin. The implementation of the > incremental backup code is not finished yet, thus the feature is > disabled. > > If you want to test-drive incremental backup APIs, you can enable the > experimental feature by using the XML documented in: > > https://libvirt.org/drvqemu.html#xmlnsfeatures > > to enable a feature named 'incremental-backup'. Please make sure to read > the caveats of doing so thoroughly. > > I also advise not to combine incremental backups with snapshots > (virDomainSnapshot* APIs) and blockjobs (virDomainBlock* APIs) as that > will not work properly without a patch enabling also experimental qemu > features. > > I also suggest you use the latest qemu for this. > > -- BRG, Andrey
