[root@ceph0 ~]# mkcephfs -a -c /etc/ceph/ceph.conf --mkfs -k ceph.keyring
temp dir is /tmp/mkcephfs.gA4D6w9iUt
preparing monmap in /tmp/mkcephfs.gA4D6w9iUt/monmap
/usr/bin/monmaptool --create --clobber --add a 127.0.0.1:6789 --add b 127.0.0.1:6790 --add c 127.0.0.1:6791 --print /tmp/mkcephfs.gA4D6w9iUt/monmap
/usr/bin/monmaptool: monmap file /tmp/mkcephfs.gA4D6w9iUt/monmap
/usr/bin/monmaptool: generated fsid 8f33c93e-5701-4f7f-899e-59c17da1a54f
epoch 0
fsid 8f33c93e-5701-4f7f-899e-59c17da1a54f
last_changed 2013-04-17 09:21:00.967242
created 2013-04-17 09:21:00.967242
0: 127.0.0.1:6789/0 mon.a
1: 127.0.0.1:6790/0 mon.b
2: 127.0.0.1:6791/0 mon.c
/usr/bin/monmaptool: writing epoch 0 to /tmp/mkcephfs.gA4D6w9iUt/monmap (3 monitors)
Building generic osdmap from /tmp/mkcephfs.gA4D6w9iUt/conf
/usr/bin/osdmaptool: osdmap file '/tmp/mkcephfs.gA4D6w9iUt/osdmap'
/usr/bin/osdmaptool: writing epoch 1 to /tmp/mkcephfs.gA4D6w9iUt/osdmap
Generating admin key at /tmp/mkcephfs.gA4D6w9iUt/keyring.admin
creating /tmp/mkcephfs.gA4D6w9iUt/keyring.admin
Building initial monitor keyring
cat: /tmp/mkcephfs.gA4D6w9iUt/key.*: No such file or directory