Editing Ceph Storage Cluster (section)

===== Client keyring =====
While the admin keyring/credentials could be used, for obvious reasons a separate user should be created for mounting the Ceph FS.  While it is possible to create a separate user for each client system, there is no need to go to that level of paranoia.  The keyring must be created on a system with admin access to the cluster (generally the master node) and then copied to the client system. Go to the master node to create the authentication token, selecting something appropriate for the username:

 ceph fs authorize <filesystem> client.<username> / rw > /etc/ceph/ceph.client.<username>.keyring

This same keyring file can then be copied over to each client system without recreating it.

 ssh <client> mkdir /etc/ceph
 scp /etc/ceph/ceph.conf <client>:/etc/ceph
 scp /etc/ceph/ceph.client.<username>.keyring <client>:/etc/ceph