On Wed, Oct 12, 2016 at 10:35 PM, Mike Jacobacci <mi...@flowjo.com> wrote:
> Figured it out finally!!  RBD images must be in format 1, I had to export
> the old image and import it as format 1, trying to create format 1 image
> fails, it's doesn't like the --image-format command:"
>
> "rbd: the argument for option '--format' is invalid"

You should be able to create format 1 images with:

  $ rbd create --size 1G --image-format 1 $IMAGENAME

That said, images mustn't be in format 1 - you just need to disable
features unsupported by the kernel (or create images with the supported
feature set in the first place).  See
http://lists.opennebula.org/pipermail/ceph-users-ceph.com/2016-May/009635.html
for details.

Thanks,

                Ilya
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