Hi,
We created a testing rbd block device image as following:
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# rbd create 4copy/foo --size 10G
# rbd feature disable 4copy/foo object-map fast-diff deep-flatten
# rbd --image 4copy/foo info
rbd image 'foo':
size 10 GiB in 2560 objects
order 22 (4 MiB objects)
id: 122f36b8b4567
block_name_prefix: rbd_data.122f36b8b4567
format: 2
features: layering, exclusive-lock
op_features:
flags:
create_timestamp: Thu Nov 8 19:42:25 2018
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Then try to mount it on client but got error and can't be mounted:
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# mount /dev/rbd0 /mnt
mount: /dev/rbd0 is write-protected, mounting read-only
mount: unknown filesystem type '(null)'
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Did we do any step incorrect? We're using mimic. Thanks.
Besides, the rbd client is deployed through ceph-ansible as client role and
found that the ceph.client.admin.keyring from admin server was also copied to
the client machine. Is it necessary? Thanks a lot.
Best Regards,
/ST Wong
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