Ceph

environment:centos7+ceph v0.87
problem:

1. the function do_map() in /etc/init.d/rbdmap will do post-mapping checking after mapped a new image, but the directory /etc/ceph/rbd.d/ doesn't exist at all and isn't created automaticall. Therefore, the “rbdmap” sctrip failed to do post-mapping checking.
2. In /etc/ceph/rbdmap, auth parameter "id=client,keyring=/etc/ceph/ceph.client.keyring" is not correct, and it should be "id=admin,keyring=/etc/ceph/ceph.client.admin.keyring", user without "client." prefix.
3. the parameter "--keyfile" cant't be used when map a rbd, and it can be replaced by "--keyring". There is no description of "--keyring" in the helping info of "rbd -h".
   

   [root@c8 src]# rbd map im1 --id admin --keyfile /etc/ceph/ceph.client.admin.keyring 
   rbd: failed to get secret
   rbd: map failed: (22) Invalid argument
   2015-07-24 23:27:03.415795 7f585deaf880 -1 auth: failed to decode key '[client.admin]
           key = AQByfqZVOAGSAhAAGnjXsO2WZpK1qT7ZNQ9IgA==
           auid = 0
           caps mds = "allow" 
           caps mon = "allow *" 
           caps osd = "allow *" 
   [root@c8 src]# rbd map im1 --id admin --keyring /etc/ceph/ceph.client.admin.keyring 
   /dev/rbd2
   [root@c8 src]# rbd -h |grep keyring
   [root@c8 src]#