Use, expansion, and deletion of Linux LVM logical volumes-use multiple hard drive combinations

1, creating a logical volume

View Physical Disk:[[email protected] ~]# parted -l | grep  ' Disk /dev/s '  # If the partition table is gpt[[email protected] ~]# fdisk -l | grep  ' Disk /dev/s '     #如果分区表是MBRDisk  /dev/sda: 214.7 GB, 214748364800 bytes, 419430400  Sectorsdisk /dev/sdc: 21.5 gb, 21474836480 bytes, 41943040 sectorsdisk  /DEV/SDD: 21.5 GB, 21474836480 BYTES, 41943040 SECTORSDISK /DEV/SDB:  21.5 gb, 21474836480 bytes, 41943040 sectors[[email protected] ~]#   If the partition is less than 2T, it is recommended to convert to MBR partition table [[Email protected] ~]# parted -s /dev/sdb mklabel  msdos[[email protected] ~]# parted -s /dev/sdc mklabel msdos[[email  protected] ~]# parted -s /dev/sdd mklabel msdos[[email protected]  ~]# dd if=/dev/zero  of=/dev/sdb bs=512k count=1[[email protected] ~]# dd if=/dev/zero of=/dev/ sdc bs=512k count=1[[email protected] ~]# dd if=/dev/zero of=/dev/sdd  Bs=512k count=1 Create pv[[email protected] ~]# pvcreate /dev/sdb[[email  on the free disk protected] ~]# pvcreate /dev/sdc[[email protected] ~]# pvcreate /dev/sdd[[ email protected] ~]# pvdisplay   #验证上述结果基于PV上创建VG [[email protected] ~]#  vgcreate VG_chunli /dev/sdb /dev/sdc /dev/sdd  #创建名为 ' Vg_chunli ' volume group [[email  protected] ~]# vgdisplay  #验证上述结果 [[email protected] ~]# 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[[email protected] ~]#  create a logical volume based on VG: [[Email protected] ~]# lvcreate  --name logic_chunli --size 59g   vg_chunli[[email protected] ~]#  lvdisplay  Boot automatically mount: [r[email protected] ~]# mkfs.ext4 /dev/vg_chunli/logic_chunli[ [email protected] ~]# mkdir /mnt/mount[[email protected] ~]# blkid / Dev/vg_chunli/logic_chunli/dev/vg_chunli/logic_chunli: uuid= "739588df-466a-41c2-a703-8860fe849134"   Type= "Ext4"  [[email protected] ~]# vim /etc/fstab  #在尾行追加UUID = " 739588df-466a-41c2-a703-8860fe849134 " /mnt/mount     ext4     defaults        1 2[[email protected] ~]#  mount -a[[email protected] ~]# 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[[email protected] ~]# [[email protected] ~]# 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[[email protected] ~]#  [[email protected] ~]# 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[[email protected] ~]#

2,LVM expansion

[[email protected] ~]# fdisk -l | grep  '/dev/s ' Disk /dev/sdc:  21.5 GB, 21474836480 BYTES, 41943040 SECTORSDISK /DEV/SDA: 214.7 GB,  214748364800 bytes, 419430400 sectors/dev/sda1   *         2048     2099199     1048576    83  Linux/dev/sda2         2099200    419430399   208665600   8e  linux lvmdisk /dev/ sdb: 21.5 gb, 21474836480 bytes, 41943040 sectorsdisk /dev/sdd: 21.5  GB, 21474836480 bytes, 41943040 sectorsDisk /dev/sde: 161.1 GB,  161061273600 bytes, 314572800 sectors[[email protected] ~]# pvcreate /dev/ Sde[[email protected] ~]# 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[[email protected] ~]# [[email protected]  ~]# vgextend cl /dev/sde  #扩展cl [[email protected] ~]# lvextend -- size 200g /dev/cl/home[[email protected] ~]# df -ht/dev/mapper/cl-home                 xfs        150g   33m  150g   1% /home[[email  protected] ~]# xfs_growfs /dev/cl/home[[email protected] ~]# df -ht/dev/mapper/cl-home                 xfs        200g   33m  200g   1% /home[[email  protected] ~]#

3. Delete the logical volume

[Email protected] ~]# umount/dev/vg_chunli/lv_chunli[[email protected] ~]# Lvremove/dev/vg_chunli/lv_chunli[[email Protected] ~]# vgremove vg_chunli[[email protected] ~]# Pvremove/dev/sdb

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Use, expansion, and deletion of Linux LVM logical volumes-use multiple hard drive combinations