Re: Understanding Ceph

[Dimitri Maziuk <dmaziuk@bmrb.wisc.edu>]

On 1/24/2013 9:58 AM, Wido den Hollander wrote:
> On 01/24/2013 04:53 PM, Jens Kristian Søgaard wrote:
>> Hi Dimitri,
>>
>>> Where in ceph.conf do I tell it to use qemu and librbd instead of
>>> kernel module?
>>
>> You do not need to specify that in ceph.conf.
>>
>> When you run qemu then specify the disk for example like this:
>>
>>   -drive format=rbd,file=rbd:/pool/imagename,if=virtio,index=0,boot=on
>>
>
> Small typo :) It has to be:
>
>   -drive format=rbd,file=rbd:pool/imagename,if=virtio,index=0,boot=on

Thanks but I'm still missing the context. I'm following this document:
  http://ceph.com/docs/master/start/quick-start/
to set up an osd/mds/mon *server*.

The step that's failing without the kernel module is "Deploy the 
configuration #2":
  mkcephfs -a -c /etc/ceph/ceph.conf -k ceph.keyring

Are you saying I'm to run "qemu -drive ..." instead of mkcephfs?

Dima (I'm assuming either you aren't or qemu has changed a lot since I 
last looked)

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