LVM笔记

    Linux 磁盘  评论
功能 PV管理命令 VG管理命令 LV管理命令
scan 扫描 pvscan vgscan lvscan
create 创建 pvcreate vgcreate lvcreate
display 显示 pvdisplay vgdisplay lvdisplay
remove 移除 pvremove vgremove lvremove
extend 扩展 vgextend lvextend
reduce 减少 vgreduce lvreduce

查看磁盘

lsblk -f
  • 创建PV
[root@192-168-4-254 ~]# pvcreate /dev/sda
  Physical volume "/dev/sda" successfully created.
[root@192-168-4-254 ~]# pvcreate /dev/sdb
  Physical volume "/dev/sdb" successfully created.
  • 查看PV
[root@192-168-4-254 ~]# pvs
  PV         VG     Fmt  Attr PSize    PFree
  /dev/sda          lvm2 ---   100.00g 100.00g
  /dev/sdb          lvm2 ---   100.00g 100.00g
  • 创建VG
[root@192-168-4-254 ~]# vgcreate data /dev/sda
  Volume group "data" successfully created
  • 扩展VG
[root@192-168-4-254 ~]# vgextend data /dev/sdb
  Volume group "data" successfully extended
  • 查看VG
[root@192-168-4-254 ~]# vgs
  VG     #PV #LV #SN Attr   VSize    VFree
  centos   1   2   0 wz--n- <199.00g   4.00m
  data     2   0   0 wz--n-  199.99g 199.99g
  • 创建LV

使用lvcreate创建LV。lvcreate -n lvname -L lvsize(M，G)|-l LEnumber vgname

[root@192-168-4-254 ~]# lvcreate -n lvname -L 199.99g data
  Rounding up size to full physical extent 199.99 GiB
WARNING: ext4 signature detected on /dev/data/lvname at offset 1080. Wipe it? [y/n]: y
  Wiping ext4 signature on /dev/data/lvname.
  Logical volume "lvname" created.
  • 查看LV
[root@192-168-4-254 ~]# lvs
  LV     VG     Attr       LSize    Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
  root   centos -wi-ao---- <191.12g
  swap   centos -wi-ao----   <7.88g
  lvname data   -wi-a-----  199.99g
  • 扩展LV
[root@192-168-4-254 ~]# lvextend -l +100%FREE /dev/mapper/data-data
    Size of logical volume apsvg/apspool changed from <500.00 GiB (127999 extents) to 799.99 GiB (204798 extents).
  Logical volume apsvg/apspool successfully resized.
  • 文件系统扩容
# ext2 ext3 ext4
resize2fs /dev/mapper/apsvg-apspool
# xfs
xfs_growfs /

QiOld Man