[root@xgto01c010243134009 ceph]# rbd --help
usage: rbd [-n <auth user>] [OPTIONS] <cmd> ...
where 'pool' is a rados pool name (default is 'rbd') and 'cmd' is one of:
(ls | list) [-l | --long ] [pool-name] list rbd images
(-l includes snapshots/clones)
info <image-name> show information about image size,
striping, etc.
create [--order <bits>] [--image-features <features>] [--image-shared]
--size <MB> <name> create an empty image
clone [--order <bits>] [--image-features <features>] [--image-shared]
<parentsnap> <clonename> clone a snapshot into a COW
child image
children <snap-name> display children of snapshot
flatten <image-name> fill clone with parent data
(make it independent)
resize --size <MB> <image-name> resize (expand or contract) image
rm <image-name> delete an image
export <image-name> <path> export image to file
"-" for stdout
import [--image-features <features>] [--image-shared]
<path> <image-name> import image from file (dest
defaults as the filename part
of file). "-" for stdin
diff <image-name> [--from-snap <snap-name>] print extents that differ since
a previous snap, or image creation
export-diff <image-name> [--from-snap <snap-name>] <path>
export an incremental diff to
path, or "-" for stdout
merge-diff <diff1> <diff2> <path> merge <diff1> and <diff2> into
<path>, <diff1> could be "-"
for stdin, and <path> could be "-"
for stdout
import-diff <path> <image-name> import an incremental diff from
path or "-" for stdin
(cp | copy) <src> <dest> copy src image to dest
(mv | rename) <src> <dest> rename src image to dest
snap ls <image-name> dump list of image snapshots
snap create <snap-name> create a snapshot
snap rollback <snap-name> rollback image to snapshot
snap rm <snap-name> deletes a snapshot
snap purge <image-name> deletes all snapshots
snap protect <snap-name> prevent a snapshot from being deleted
snap unprotect <snap-name> allow a snapshot to be deleted
watch <image-name> watch events on image
status <image-name> show the status of this image
map <image-name> map image to a block device
using the kernel
unmap <device> unmap a rbd device that was
mapped by the kernel
showmapped show the rbd images mapped
by the kernel
lock list <image-name> show locks held on an image
lock add <image-name> <id> [--shared <tag>] take a lock called id on an image
lock remove <image-name> <id> <locker> release a lock on an image
bench-write <image-name> simple write benchmark
--io-size <bytes> write size
--io-threads <num> ios in flight
--io-total <bytes> total bytes to write
--io-pattern <seq|rand> write pattern
样例：
检索映像信息
用下列命令检索某个特定映像的信息，用映像名字替换 {image-name} ：
rbd info {image-name}
例如：
rbd info foo
用下列命令检索某存储池内的映像的信息，用映像名字替换 {image-name} 、用存储池名字替换 {pool-name} ：
rbd info {pool-name}/{image-name}
例如：
[root@test ceph]# rbd info nova/2b105eef-e19d-494d-b15e-cb334db2a3c7_disk rbd image '2b105eef-e19d-494d-b15e-cb334db2a3c7_disk': size 51200 MB in 12800 objects order 22 (4096 kB objects) block_name_prefix: rbd_data.1a0df3f2ae8944a format: 2 features: layering flags:
查看pool的信息 ceph osd lspools
[root@test ~]# ceph osd lspools 查看pool 0 rbd,1 nova,2 cinder,3 glance,
查看pool里面的内容 rbd ls nova
[root@test ~]# rbd ls nova 查看nova pool里面的内容 3135fd37-0231-4e6f-a90c-bc90971f8ec1_disk 47b63134-8d32-4382-850c-9a64ebb1b6b0_disk 5734d41d-3c9a-4638-808c-c5755a7cfef4_disk 7a99169e2c87223802ed55f856b369ed5e174001_disk da1a7f6c-7702-4d6b-86c7-231d322c6565_disk 018a0ead-6d7a-4532-b05c-19cad1ce662f_disk 018a0ead-6d7a-4532-b05c-19cad1ce662f_disk.config 0203f6f3-168d-4a64-bf35-e18c016cc58a_disk 0203f6f3-168d-4a64-bf35-e18c016cc58a_disk.config
查看某一个镜像的快照信息rbd snap ls cinder/volume-0fa87427-bfe6-40af-9960-2980bcf05091
[root@xgto01c010243134009 snapshots]# rbd snap ls cinder/volume-0fa87427-bfe6-40af-9960-2980bcf05091
SNAPID NAME SIZE
37 snapshot-8a57243f-66d9-447f-b624-d2b73eeeba56 2048 MB
[root@xgto01c010243134009 snapshots]#