ceph 搭建 ubuntu 18.04 块设备 创建
1，ceph 搭建 ubuntu 18.04 块设备 创建
- 创建存储池（OSD数量在5到10个时，pg_num设置为512）
ceph osd pool create rbd 512
- 查看存储池
# ceph osd lspools
1 rbd,
# ceph osd pool ls detail
pool 1 'rbd' replicated size 3 min_size 2 crush_rule 0 object_hash rjenkins pg_num 512 pgp_num 512 last_change 68 flags hashpspool stripe_width 0
# rados df
POOL_NAME USED OBJECTS CLONES COPIES MISSING_ON_PRIMARY UNFOUND DEGRADED RD_OPS RD WR_OPS WR
rbd 0B 0 0 0 0 0 0 0 0B 0 0B
# ceph osd pool get rbd pg_num
pg_num: 512
- 不设置存储池配额
- 设置存储池副本数为2
# ceph osd pool get rbd size
size: 3
# ceph osd pool set rbd size 2
set pool 1 size to 2
2，创建rbd
# rbd create --size=102400G rbd/diskceph
# rbd ls
diskceph
# rbd info diskceph
rbd image 'diskceph':
size 100TiB in 26214400 objects
- 映射块设备
# rbd map rbd/diskceph
rbd: sysfs write failed
RBD image feature set mismatch. You can disable features unsupported by the kernel with "rbd feature disable diskceph object-map fast-diff deep-flatten".
# rbd feature disable diskceph object-map fast-diff deep-flatten
# rbd map rbd/diskceph
/dev/rbd0
# rbd showmapped
id pool image snap device
0 rbd diskceph - /dev/rbd0
- 挂载块设备
# mkfs.xfs /dev/rbd0
mkdir storage
mount /dev/rbd0 /storage
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