On Fri, May 13, 2016 at 10:11 PM, Steven Hsiao-Ting Lee
<shl1@xxxxxxxxxxx> wrote:
> Hi,
>
> I’m playing with Jewel and discovered format 1 images have been deprecated. Since the rbd kernel module in CentOS/RHEL 7 does not yet support format 2 images, how do I access RBD images created in Jewel from CentOS/RHEL 7 clients? Thanks!
It does support format 2 images. What it doesn't support is the extra
features enabled by default in jewel.
> Do
>
> $ rbd feature disable <image-name> deep-flatten,fast-diff,object-map,exclusive-lock
>
> to disable features unsupported by the kernel client. If you are using the
> kernel client, you should create your images with
>
> $ rbd create --size <size> --image-feature layering <image-name>
>
> or add
>
> rbd default features = 3
>
> to ceph.conf on the client side. (Setting rbd default features on the
> OSDs will have no effect.)
Thanks,
Ilya
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