使用bluestore
(1) 创建逻辑卷
vgcreate cache /dev/sdb lvcreate --size 100G --name db-lv-0 cache
vgcreate cache /dev/sdb lvcreate --size 100G --name wal-lv-0 cache
(2) 创建OSD
ceph-deploy osd create --bluestore storage1 --data /dev/sdc --block-db cache/db-lv-0 --block-wal cache/wal-lv-0
ceph-deploy osd create --bluestore storage2 --data /dev/sdc --block-db cache/db-lv-0 --block-wal cache/wal-lv-0
ceph-deploy osd create --bluestore storage3 --data /dev/sdc --block-db cache/db-lv-0 --block-wal cache/wal-lv-0