LVM扩容

1 检查当前使用情况
df -h
lvs
vgs
2 在线扩容/opt
lvextend -L +100GB /dev/mapper/VolGroup-opt
xfs_growfs /dev/mapper/VolGroup-opt
3 扩容后检查
lvs
df -h

df -hT
lvs

lvextend -L +100GB /dev/mapper/VolGroup-opt

xfr_growfs /dev/mapper/VolGroup-opt

df -hT 

# xfs_growfs
Usage: xfs_growfs [options] mountpointOptions:-d          grow data/metadata section-l          grow log section-r          grow realtime section-n          don't change anything, just show geometry-i          convert log from external to internal format-t          alternate location for mount table (/etc/mtab)-x          convert log from internal to external format-D size     grow data/metadata section to size blks-L size     grow/shrink log section to size blks-R size     grow realtime section to size blks-e size     set realtime extent size to size blks-m imaxpct  set inode max percent to imaxpct-V          print version information

# xfs_growfs /dev/sdc
meta-data=/dev/sdc               isize=512    agcount=4, agsize=3276800 blks=                       sectsz=512   attr=2, projid32bit=1=                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=13107200, imaxpct=25=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=6400, version=2=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

# xfs_growfs /dev/sdc -D 13107200
meta-data=/dev/sdc               isize=512    agcount=4, agsize=3276800 blks=                       sectsz=512   attr=2, projid32bit=1=                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=13107200, imaxpct=25=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=6400, version=2=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data size unchanged, skipping