Re: [libvirt-users] Create RBD Format 2 disk images with qemu-image

On 10/17/2013 05:28 AM, Jon wrote: > > Hello, > > I would like to use RBD Format 2 images so I can take advantage of > layering. > > However, when I use "qemu-img create -f rbd rbd:data/foo 10G", I get > format 1 RBD images. (Actually, when I use the "-f rbd" flag, qemu-img > core dumps, but it looks like that feature may have been deprecated [1]) > > Is there any way to have qemu-img create RBD Format 2 images or am I > better off using `rbd` to create the image then booting from the disk > and performing the install, etc.? If you're using recent cuttlefish or dumpling releases of ceph, you can add settings to ceph.conf to make qemu-img and anything else using librbd create format 2 images. In the [client] or [global] section of /etc/ceph/ceph.conf, add: rbd default format = 2 Josh > Thanks for the assist. > > Best Regards, > Jon A > > > [1] > http://lists.ceph.com/pipermail/ceph-users-ceph.com/2013-June/002131.html > > > _______________________________________________ > libvirt-users mailing list > libvirt-users(a)redhat.com > https://www.redhat.com/mailman/listinfo/libvirt-users >