root@ceph01:/etc/ceph# rbd create --size 1024 test

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# rbd ls

mysql-hzb

test

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# rbd info

rbd: image name was not specified

root@ceph01:/etc/ceph# rbd info test

rbd image 'test':

    size 1024 MB in 256 objects

    order 22 (4096 kB objects)

    block_name_prefix: rbd_data.10ac74b0dc51

    format: 2

    features: layering

    flags:

root@ceph01:/etc/ceph# rbd map test

/dev/rbd0

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# mkdir -p /root/testrbd/

root@ceph01:/etc/ceph# mkfs.xfs -q /dev/rbd0

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# rbd showmapped

id pool image snap device

0  rbd  test  -    /dev/rbd0

root@ceph01:/etc/ceph# mount /dev/rbd0 /root/testrbd/

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# df -h /root/testrbd/

文件系统        容量  已用  可用 已用% 挂载点

/dev/rbd0      1014M   33M  982M    4% /root/testrbd

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# rbd resize --size 2048 test

Resizing image: 100% complete...done.

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# df -h /root/testrbd/

文件系统        容量  已用  可用 已用% 挂载点

/dev/rbd0      1014M   33M  982M    4% /root/testrbd

root@ceph01:/etc/ceph# rbd map test

/dev/rbd1

root@ceph01:/etc/ceph# df -h /root/testrbd/

文件系统        容量  已用  可用 已用% 挂载点

/dev/rbd0      1014M   33M  982M    4% /root/testrbd

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph#

root@ceph01:/etc/ceph# 

要在 resize之后执行

# xfs_growfs /root/testrbd/