LVM 扩容

一、扩展 PV

1.1 pvextend

~]# vgs   # 查看现有 vg 状态
  VG   #PV #LV #SN Attr   VSize  VFree
  data   1   1   0 wz--n-  1.09t    0 
  ssd    1   1   0 wz--n- <1.75t    0

~]# vgextend data /dev/sdd   # 扩展 vg 空间
  Physical volume "/dev/sdd" successfully created.
  Volume group "data" successfully extended

~]# vgs   # 扩展后状态
  VG   #PV #LV #SN Attr   VSize  VFree
  data   2   1   0 wz--n-  2.18t 1.09t
  ssd    1   1   0 wz--n- <1.75t    0

二、扩容 lvm

2.1 lvextend

~]# pvs   # 查看 pv 状态
  PV         VG   Fmt  Attr PSize  PFree
  /dev/sda   ssd  lvm2 a--  <1.75t    0 
  /dev/sdc   data lvm2 a--   1.09t    0 
  /dev/sdd   data lvm2 a--   1.09t 1.09t

~]# lvextend -L +1.09t /dev/data/images   # 扩容 lvm
  Rounding size to boundary between physical extents: 1.09 TiB.
  Size of logical volume data/images changed from 1.09 TiB (286015 extents) to 2.18 TiB (571752 extents).
  Logical volume data/images successfully resized.

~]# lvs   # 查看 lvm 扩容后状态
  LV       VG   Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  images   data -wi-ao----  2.18t                                                    
  tag_data ssd  -wi-a----- <1.75t

~]# vgs   # 查看扩容后 vg 状态
  VG   #PV #LV #SN Attr   VSize  VFree 
  data   2   1   0 wz--n-  2.18t <1.09g
  ssd    1   1   0 wz--n- <1.75t     0

三、刷新文件系统大小

3.1 blkid

~]# blkid
/dev/mapper/data-images: UUID="c4880dd6-b802-4aa6-a46e-852a6b11b2d4" TYPE="xfs"

3.2 选择适当工具刷新大小

# 如果此逻辑卷上的文件系统是EXT3/EXT4类型，需要使用resize2fs工具

# 如果此逻辑卷上的文件系统是XFS类型，需要使用xfs_growfs

~]# xfs_growfs /dev/data/images 
meta-data=/dev/mapper/data-images isize=512    agcount=4, agsize=73219840 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=292879360, imaxpct=5
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=143007, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 292879360 to 585474048