Ubuntu 14.04
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Ceph : Configure Client
2014/06/11
 
How to use Ceph Cluster Storage from Clients.
                                    |
     +------------------+           |           +-----------------+
     |  [ Admin Node ]  |10.0.0.30  |  10.0.0.31|  [ Client PC ]  |
     |   Ceph-Deploy    |-----------+-----------|                 |
     | Meta Data Server |           |           |                 |
     +------------------+           |           +-----------------+
                                    |
        +---------------------------+--------------------------+
        |                           |                          |
        |10.0.0.80                  |10.0.0.81                 |10.0.0.82 
+-------+----------+       +--------+---------+       +--------+---------+
| [ Ceph Node #1 ] |       | [ Ceph Node #2 ] |       | [ Ceph Node #3 ] |
|  Monitor Daemon  +-------+  Monitor Daemon  +-------+  Monitor Daemon  |
|  Object Storage  |       |  Object Storage  |       |  Object Storage  |
+------------------+       +------------------+       +------------------+

[1] For example, mount as a block device on Admin Node.
# create an image-file with 5G

trusty@ceph-mds:~$
rbd create disk01 --size 5120
# confirm

trusty@ceph-mds:~$
rbd ls -l

NAME    SIZE PARENT FMT PROT LOCK
disk01 5120M          1

# map the image-file with a device

trusty@ceph-mds:~$
sudo rbd map disk01
# confirm

trusty@ceph-mds:~$
rbd showmapped

id pool image  snap device
1  rbd  disk01 -    /dev/rbd1

# format with ext4

trusty@ceph-mds:~$
sudo mkfs.ext4 /dev/rbd1
# mount it

trusty@ceph-mds:~$
sudo mount /dev/rbd1 /mnt
trusty@ceph-mds:~$
df -h

Filesystem                 Size  Used Avail Use% Mounted on
/dev/mapper/temp--vg-root   26G  1.3G   23G   6% /
none                       4.0K     0  4.0K   0% /sys/fs/cgroup
udev                       2.0G  4.0K  2.0G   1% /dev
tmpfs                      396M  316K  396M   1% /run
none                       5.0M     0  5.0M   0% /run/lock
none                       2.0G     0  2.0G   0% /run/shm
none                       100M     0  100M   0% /run/user
/dev/vda1                  236M   36M  188M  16% /boot
/dev/rbd1                  4.8G   10M  4.6G   1% /mnt
# just mounted

[2] For example, mount as a filesystem by CephFS from a ClientPC.
root@dlp:~#
apt-get -y install ceph-common ceph-fs-common
# get Admin key from Admin Node

trusty@dlp:~$
ssh ceph-mds.srv.world "sudo ceph-authtool -p /etc/ceph/ceph.client.admin.keyring" > admin.key

trusty@ceph-mds.srv.world's password:
trusty@dlp:~$
chmod 600 admin.key
trusty@dlp:~$
sudo mount -t ceph ceph01.srv.world:6789:/ /mnt -o name=admin,secretfile=/home/trusty/admin.key

trusty@dlp:~$
df -h

Filesystem                 Size  Used Avail Use% Mounted on
/dev/mapper/temp--vg-root   26G  1.2G   23G   5% /
none                       4.0K     0  4.0K   0% /sys/fs/cgroup
udev                       2.0G  4.0K  2.0G   1% /dev
tmpfs                      396M  304K  396M   1% /run
none                       5.0M     0  5.0M   0% /run/lock
none                       2.0G     0  2.0G   0% /run/shm
none                       100M     0  100M   0% /run/user
/dev/vda1                  236M   36M  188M  16% /boot
10.0.0.81:6789:/            76G   23G   54G  30% /mnt
# just mounted

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