What command are you using to mount the /dev/rbd0 to start with? You seem to have missed that on your copy and paste.
On Thu, Nov 8, 2018 at 8:06 PM ST Wong (ITSC) <s...@itsc.cuhk.edu.hk> wrote: > Hi, > > > > We created a testing rbd block device image as following: > > > > ----- cut here ------- > > # 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 > > > > ----- cut here ------- > > > > Then try to mount it on client but got error and can’t be mounted: > > > > ----- cut here ------- > > # mount /dev/rbd0 /mnt > > mount: /dev/rbd0 is write-protected, mounting read-only > > mount: unknown filesystem type '(null)' > > ----- cut here ------- > > > > 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 > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com >
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