Ceph » rbd

`/usr/bin/rbd` have few errors with "rbd default format".

With the following in "/etc/ceph/ceph.conf":

[client]
    rbd default format = 2

it is impossible to create a new image with format=1 because "--image-format" is silently ignored:

# rbd create rbd/temporary1 --size 20000 --image-format=1

# rbd info rbd/temporary1                                                                                                  
rbd image 'temporary1':
        size 20000 MB in 5000 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.63cc412ae8944a
        format: 2
        features: layering, striping
        stripe unit: 4096 kB
        stripe count: 1

In addition to this an image was created with striping which was not explicitly used in "rbd create" command.
Compare it to the following, without "rbd default format" in "ceph.conf":

# rbd create rbd/temporary1 --size 20000 --image-format=2
# rbd info rbd/temporary1                                                                                                  
rbd image 'temporary1':
        size 20000 MB in 5000 objects
        order 22 (4096 kB objects)
        block_name_prefix: rbd_data.63c3ed2ae8944a
        format: 2
        features: layering

"rbd default format" should not enforce striping unless given explicitly.
It would be best to use the same defaults for image format 2 disregarding of where format was chosen (in command line or in ceph.conf file).