Linux LVM 创建 删除 扩展 收缩

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创建LVM

查看物理磁盘：

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[root@localhost ~]# parted -l | grep 'Disk /dev/s' #如果分区表是GPT
[root@localhost ~]# fdisk -l | grep 'Disk /dev/s'  #如果分区表是MBR
Disk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 sectors
Disk /dev/sdc: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk /dev/sdd: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
[root@localhost ~]#

硬盘初始化

如果磁盘是2T或者2T以内 初始化为MBR

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[root@localhost ~]# parted -s /dev/sdb mklabel msdos
[root@localhost ~]# parted -s /dev/sdc mklabel msdos
[root@localhost ~]# parted -s /dev/sdd mklabel msdos

如果磁盘是超过2T 初始化为GPT

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[root@localhost ~]# parted -s /dev/sdb mklabel  gpt
[root@localhost ~]# parted -s /dev/sdc mklabel  gpt
[root@localhost ~]# parted -s /dev/sdd mklabel  gpt

在空闲磁盘上创建PV

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[root@localhost ~]# pvcreate /dev/sdb
[root@localhost ~]# pvcreate /dev/sdc
[root@localhost ~]# pvcreate /dev/sdd
[root@localhost ~]# pvdisplay  #验证上述结果

基于PV上创建VG

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[root@localhost ~]# vgcreate VG_chunli /dev/sdb /dev/sdc /dev/sdd #创建名为'VG_chunli'的卷组
[root@localhost ~]# vgdisplay #验证上述结果
[root@localhost ~]# vgs #验证上述结果
  VG        #PV #LV #SN Attr   VSize   VFree
  VG_chunli   3   0   0 wz--n-  59.99g 59.99g
[root@localhost ~]#

基于VG创建逻辑卷：

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[root@localhost ~]# lvcreate --name Logic_chunli --size 59G   VG_chunli
[root@localhost ~]# lvdisplay

开机自动挂载：

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[root@localhost ~]# mkfs.ext4 /dev/VG_chunli/Logic_chunli
[root@localhost ~]# mkdir /mnt/mount
[root@localhost ~]# blkid /dev/VG_chunli/Logic_chunli
/dev/VG_chunli/Logic_chunli: UUID="739588df-466a-41c2-a703-8860fe849134" TYPE="ext4"
[root@localhost ~]# vim /etc/fstab #在尾行追加
UUID="739588df-466a-41c2-a703-8860fe849134" /mnt/mount     ext4    defaults        1 2
[root@localhost ~]# mount -a
[root@localhost ~]# df -hT #查看挂载信息
Filesystem                         Type      Size  Used Avail Use% Mounted on
/dev/mapper/VG_chunli-Logic_chunli ext4       58G   53M   55G   1% /mnt/mount
[root@localhost ~]#
 
 
 
[root@localhost ~]# vgs #查看剩余的VG
  VG        #PV #LV #SN Attr   VSize   VFree  
  VG_chunli   3   1   0 wz--n-  59.99g 1012.00m
[root@localhost ~]#
 
[root@localhost ~]# pvs #查看剩余的PV
  PV         VG        Fmt  Attr PSize   PFree  
  /dev/sdb   VG_chunli lvm2 a--   20.00g       0
  /dev/sdc   VG_chunli lvm2 a--   20.00g       0
  /dev/sdd   VG_chunli lvm2 a--   20.00g 1012.00m
[root@localhost ~]#

LVM 删除

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[root@localhost ~]# umount /dev/VG_chunli/LV_chunli
[root@localhost ~]# lvremove /dev/VG_chunli/LV_chunli
[root@localhost ~]# vgremove VG_chunli
[root@localhost ~]# pvremove /dev/sdb

LVM 扩容

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[root@localhost ~]# fdisk -l | grep '/dev/s'
Disk /dev/sdc: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk /dev/sda: 214.7 GB, 214748364800 bytes, 419430400 sectors
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   419430399   208665600   8e  Linux LVM
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk /dev/sdd: 21.5 GB, 21474836480 bytes, 41943040 sectors
Disk /dev/sde: 161.1 GB, 161061273600 bytes, 314572800 sectors
 
 
[root@localhost ~]# pvcreate /dev/sde
[root@localhost ~]# vgs #查看已经存在的VG
  VG        #PV #LV #SN Attr   VSize   VFree  
  VG_chunli   3   1   0 wz--n-  59.99g 1012.00m
  cl          1   3   0 wz--n- 199.00g    4.00m
[root@localhost ~]#
[root@localhost ~]# vgextend cl /dev/sde #扩展cl
[root@localhost ~]# lvextend --size 200G /dev/cl/home
[root@localhost ~]# df -hT
/dev/mapper/cl-home                xfs       150G   33M  150G   1% /home
[root@localhost ~]# xfs_growfs /dev/cl/home
[root@localhost ~]# df -hT
/dev/mapper/cl-home                xfs       200G   33M  200G   1% /home
[root@localhost ~]#

LVM 收缩

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未完待续。。。