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Ceph Luminous : Use as Block Device
2017/10/08 |
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Configure Clients to use Ceph Storage like follows.
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+--------------------+ | +-------------------+
| [dlp.srv.world] |10.0.0.30 | 10.0.0.x| [ Client ] |
| Ceph-Deploy +-----------+-----------+ |
| | | | |
+--------------------+ | +-------------------+
+----------------------------+----------------------------+
| | |
|10.0.0.51 |10.0.0.52 |10.0.0.53
+-----------+-----------+ +-----------+-----------+ +-----------+-----------+
| [node01.srv.world] | | [node02.srv.world] | | [node03.srv.world] |
| Object Storage +----+ Object Storage +----+ Object Storage |
| Monitor Daemon | | | | |
| | | | | |
+-----------------------+ +-----------------------+ +-----------------------+
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For exmaple, Create a block device and mount it on a Client.
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| [1] | First, Configure Sudo and SSH key-pair for a user on a Client and next, Install Ceph from Ceph admin Node like follows. |
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[cent@dlp ceph]$ ceph-deploy install client [cent@dlp ceph]$ ceph-deploy admin client
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| [2] | Create a Block device and mount it on a Client. |
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[cent@client ~]$ # create a disk with 10G [cent@client ~]$ rbd create disk01 --size 10G --image-feature layering
# show list [cent@client ~]$ rbd ls -l NAME SIZE PARENT FMT PROT LOCK disk01 10240M 2 # map the image to device [cent@client ~]$ sudo rbd map disk01 /dev/rbd0 # show mapping [cent@client ~]$ rbd showmapped id pool image snap device 0 rbd disk01 - /dev/rbd0[cent@client ~]$ df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/cl-root xfs 26G 1.8G 25G 7% / devtmpfs devtmpfs 2.0G 0 2.0G 0% /dev tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm tmpfs tmpfs 2.0G 8.4M 2.0G 1% /run tmpfs tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup /dev/vda1 xfs 1014M 231M 784M 23% /boot tmpfs tmpfs 396M 0 396M 0% /run/user/0 /dev/rbd0 xfs 10G 33M 10G 1% /mnt |