----- On Feb 15, 2018, at 12:53 PM, Kashyap Chamarthy kchamart@redhat.com wrote:
On Thu, Feb 15, 2018 at 11:41:37AM +0100, Lentes, Bernd wrote:
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Hi,
i found that: https://dustymabe.com/2015/01/11/qemu-img-backing-files-a-poor-mans-snapshot...
I tried it and it seemed to work, although my root fs was checked after the commit, anything else seemed to work. What do you think of this procedure ?
Instead of 'qemu-img create', I'd suggest using `virsh snapshot-create-as` (as shown in my previous email). This will tell libvirt to automatically use the just created QCOW2 overlay.
But yeah, one useful bit is to use the `virt-xml` tool to point to the desired disk image (instead of `virsh edit` that I mentioned in the previous email):
$ virt-xml F21server --edit target=vda \ --disk driver_type=raw,path=./A.raw
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Hi Kashyap, thanks for your quick and detailed answers. Just to be complete. The procedure in the above mentioned link does work with my old software ? pc59093:~ # rpm -qa|grep -iE 'libvirt|kvm' libvirt-cim-0.5.12-0.7.16 libvirt-python-1.2.5-1.102 libvirt-client-1.2.5-15.3 kvm-1.4.2-47.1 sles-kvm_en-pdf-11.4-0.33.1 libvirt-1.2.5-15.3 Bernd Helmholtz Zentrum München