Ceph：RBD在线扩容容量
Ceph管理端的操作：# rbd ls -p openshift
openshift-storage01
# rbd resize openshift/openshift-storage01 --size 20000
Resizing image: 100% complete...done. Ceph客户端的操作：
# rbd showmapped
id pool image snap device
0openshift openshift-storage01 - /dev/rbd0
# df -h
文件系统 容量已用可用 已用% 挂载点
/dev/mapper/cl-root179G5.7G174G 4% /
devtmpfs 1.9G 01.9G 0% /dev
tmpfs 1.9G316K1.9G 1% /dev/shm
tmpfs 1.9G 49M1.9G 3% /run
tmpfs 1.9G 01.9G 0% /sys/fs/cgroup
/dev/vda1 297M122M176M 41% /boot
tmpfs 380M 16K380M 1% /run/user/42
tmpfs 380M 48K380M 1% /run/user/0
/dev/vdb 1008G 92G866G 10% /mnt/backup
tmpfs 380M 0380M 0% /run/user/1001
/dev/rbd0 10G2.0G8.1G 20% /cephmount
# xfs_growfs -d /cephmount/
meta-data=/dev/rbd0 isize=512 agcount=17, agsize=162816 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=2621440, imaxpct=25
= sunit=1024 swidth=1024 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=2560, version=2
= sectsz=512 sunit=8 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 2621440 to 5120000
说明：容量已经扩展了
# ceph df
GLOBAL:
SIZE AVAIL RAW USED %RAW USED
224G 212G 12736M 5.53
POOLS:
NAME ID USED %USED MAX AVAIL OBJECTS
rbd 0 422 0 68433M 7
openstack 1 2159M 3.06 68433M 554
cloudstack-test 2 194 0 68433M 6
test 3 0 0 68433M 0
openshift 4 2014M 2.86 68433M 539
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