Ceph Squid : Use Block Device2024/05/03 |
Configure a Client Host [dlp] to use Ceph Storage like follows.
| +--------------------+ | | [dlp.srv.world] |10.0.0.30 | | Ceph Client +-----------+ | | | +--------------------+ | +----------------------------+----------------------------+ | | | |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 | | | | | | Manager Daemon | | | | | +-----------------------+ +-----------------------+ +-----------------------+ |
For example, Create a block device and mount it on a Client Host.
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[1] | Transfer SSH public key to Client Host and Configure it from Admin Node. |
# transfer public key root@node01:~# ssh-copy-id dlp # install required packages root@node01:~# ssh dlp "apt -y install ceph-common"
# transfer required files to Client Host root@node01:~# scp /etc/ceph/ceph.conf dlp:/etc/ceph/ ceph.conf 100% 273 150.3KB/s 00:00root@node01:~# scp /etc/ceph/ceph.client.admin.keyring dlp:/etc/ceph/ ceph.client.admin.keyring 100% 151 82.6KB/s 00:00root@node01:~# ssh dlp "chown ceph:ceph /etc/ceph/ceph.*" |
[2] | Create a Block device and mount it on a Client Host. |
# create default RBD pool [rbd] root@dlp:~# ceph osd pool create rbd 32 pool 'rbd' created # enable Placement Groups auto scale mode root@dlp:~# ceph osd pool set rbd pg_autoscale_mode on set pool 2 pg_autoscale_mode to on # initialize the pool root@dlp:~# rbd pool init rbd ceph osd pool autoscale-status POOL SIZE TARGET SIZE RATE RAW CAPACITY RATIO TARGET RATIO EFFECTIVE RATIO BIAS PG_NUM NEW PG_NUM AUTOSCALE BULK .mgr 452.0k 3.0 479.9G 0.0000 1.0 1 on False rbd 2730 3.0 479.9G 0.0000 1.0 32 on False # create a block device with 10G root@dlp:~# rbd create --size 10G --pool rbd rbd01
# confirm root@dlp:~# rbd ls -l NAME SIZE PARENT FMT PROT LOCK rbd01 10 GiB 2 # map the block device root@dlp:~# rbd map rbd01 /dev/rbd0 # confirm root@dlp:~# rbd showmapped id pool namespace image snap device 0 rbd rbd01 - /dev/rbd0 # format with XFS root@dlp:~# mkfs.xfs /dev/rbd0 meta-data=/dev/rbd0 isize=512 agcount=16, agsize=163840 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=1, rmapbt=0 = reflink=1 bigtime=0 inobtcount=0 data = bsize=4096 blocks=2621440, imaxpct=25 = sunit=16 swidth=16 blks naming =version 2 bsize=4096 ascii-ci=0, ftype=1 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=16 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 Discarding blocks...Done.root@dlp:~# mount /dev/rbd0 /mnt root@dlp:~# df -hT Filesystem Type Size Used Avail Use% Mounted on tmpfs tmpfs 392M 1.1M 391M 1% /run /dev/mapper/ubuntu--vg-ubuntu--lv ext4 28G 6.3G 20G 24% / tmpfs tmpfs 2.0G 0 2.0G 0% /dev/shm tmpfs tmpfs 5.0M 0 5.0M 0% /run/lock /dev/vda2 ext4 2.0G 95M 1.7G 6% /boot tmpfs tmpfs 392M 12K 392M 1% /run/user/0 /dev/rbd0 xfs 10G 228M 9.8G 3% /mnt |
[3] | For delete Block devices or Pools you created, run commands like follows. For deleting Pools, it needs to set [mon allow pool delete = true] on [Monitor Daemon] configuration. |
# unmap root@dlp:~# rbd unmap /dev/rbd/rbd/rbd01
# delete a block device root@dlp:~# rbd rm rbd01 -p rbd Removing image: 100% complete...done. # delete a pool # ceph osd pool delete [Pool Name] [Pool Name] *** root@dlp:~# ceph osd pool delete rbd rbd --yes-i-really-really-mean-it pool 'rbd' removed |
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