之前都是ext4文件系统的lvm操作，虽然xfs不支持缩容但是可以扩容，这里是在线扩容

[root@aiker01 ~]# lvdisplay /dev/vg1/lv3
  --- Logical volume ---
  LV Path                /dev/vg1/lv3
  LV Name                lv3
  VG Name                vg1
  LV UUID                I4f9zy-OqLx-DRtM-LRs8-FCS8-Ia2R-BcsT4r
  LV Write Access        read/write
  LV Creation host, time aiker01, 2017-12-08 01:21:35 +0800
  LV Status              available
  # open                 0
  LV Size                700.00 MiB
  Current LE             175
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:6

[root@aiker01 ~]# df -hT
Filesystem          Type      Size  Used Avail Use% Mounted on
/dev/mapper/cl-root xfs       8.6G  5.3G  3.4G  62% /
devtmpfs            devtmpfs  2.4G     0  2.4G   0% /dev
tmpfs               tmpfs     2.4G     0  2.4G   0% /dev/shm
tmpfs               tmpfs     2.4G  8.7M  2.4G   1% /run
tmpfs               tmpfs     2.4G     0  2.4G   0% /sys/fs/cgroup
/dev/mapper/cl-home xfs       4.0G   33M  4.0G   1% /home
/dev/mapper/cl-var  xfs       3.0G  159M  2.8G   6% /var
/dev/sda2           xfs       497M  132M  366M  27% /boot
tmpfs               tmpfs     479M     0  479M   0% /run/user/0
/dev/mapper/vg2-lv2 ext4      3.9G   16M  3.7G   1% /data
/dev/mapper/vg1-lv1 ext4      6.4G   18M  6.1G   1% /mnt
/dev/mapper/vg1-lv3 xfs       697M   26M  672M   4% /temp

**重新设置lv大小**
[root@aiker01 ~]# lvresize -L 800M /dev/vg1/lv3
  Size of logical volume vg1/lv3 changed from 700.00 MiB (175 extents) to 800.00 MiB (200 extents).
  Logical volume vg1/lv3 successfully resized.

更新lv卷信息（这步很重要）

[root@aiker01 ~]# xfs_growfs /dev/mapper/vg1-lv3
meta-data=/dev/mapper/vg1-lv3    isize=512    agcount=6, agsize=32000 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=179200, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=855, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 179200 to 204800

[root@aiker01 ~]# df -hT
Filesystem          Type      Size  Used Avail Use% Mounted on
/dev/mapper/cl-root xfs       8.6G  5.3G  3.4G  62% /
devtmpfs            devtmpfs  2.4G     0  2.4G   0% /dev
tmpfs               tmpfs     2.4G     0  2.4G   0% /dev/shm
tmpfs               tmpfs     2.4G  8.7M  2.4G   1% /run
tmpfs               tmpfs     2.4G     0  2.4G   0% /sys/fs/cgroup
/dev/mapper/cl-home xfs       4.0G   33M  4.0G   1% /home
/dev/mapper/cl-var  xfs       3.0G  159M  2.8G   6% /var
/dev/sda2           xfs       497M  132M  366M  27% /boot
tmpfs               tmpfs     479M     0  479M   0% /run/user/0
/dev/mapper/vg2-lv2 ext4      3.9G   16M  3.7G   1% /data
/dev/mapper/vg1-lv1 ext4      6.4G   18M  6.1G   1% /mnt
/dev/mapper/vg1-lv3 xfs       797M   26M  772M   4% /temp



本文转自 喵来个鱼 51CTO博客，原文链接：http://blog.51cto.com/m51cto/2048564，如需转载请自行联系原作者