How to extend size of LVM

While i am using VMWARE, i use thin mode for harddisk. But as i only allocate 40G for each VM, soon i find the disk is short of size.

Do i need to rebuilt VM or have some easy way to go?

First, i tried to add space to VM. But soon i find failed. As the size can only be recognized as a new space in the disk, i need to add the spare space to one partion.

Luckly i find the partion i want to add with new space is LVM.

Below is steps for this:

1. Create partion for new space

[[email protected] ~]# fdisk /dev/sda 

Command (m for help): n 

First cylinder (1160-1305, default 1160):1160 

Last cylinder or +size or +sizeM or +sizeK(1160-1305, default 1305): 1305 

Command (m for help): p 

Disk /dev/sda: 10.7 GB, 10737418240 bytes

255 heads, 63 sectors/track, 1305 cylinders

Units = cylinders of 16065 * 512 = 8225280bytes

Device Boot Start End Blocks Id System

/dev/sda1 * 1 13 104391 83 Linux

/dev/sda2 14 395 3068415 8e Linux LVM

/dev/sda3 396 777 3068415 8e Linux LVM

/dev/sda4 778 1305 4241160 5 Extended

/dev/sda5 778 1159 3068383+ 8e Linux LVM

/dev/sda6 1160 1305 1172713+ 83 Linux \\the new partion

Command (m for help): t \\change partion to LVM

Partition number (1-6): 6 

Hex code (type L to list codes): 8e 

Changed system type of partition 6 to 8e(Linux LVM)

Command (m for help): w 

The partition table has been altered!

OK here i find needs to reboot the linux, otherwise the pvcreate may failed. Is there any good solution for this? I do not know

[[email protected] ~]# pvcreate /dev/sda6 \\create new PV

Physical volume "/dev/sda6" successfully created

[[email protected] ~]# pvscan

PV/dev/sda2 VG rootvg lvm2 [2.93 GB / 0 free]

PV/dev/sda3 VG rootvg lvm2 [2.93 GB / 0 free]

PV/dev/sda5 VG rootvg lvm2 [2.93 GB / 0 free]

PV /dev/sda6 lvm2[1.12 GB] \\newed pv

Total: 4 [9.90 GB] / in use: 3 [8.78 GB] / in no VG: 1 [1.12 GB]

3、Add pv to vg

[[email protected] ~]# vgextend rootvg/dev/sda6

Volume group "rootvg" successfully extended

[[email protected] ~]# pvscan

PV/dev/sda2 VG rootvg lvm2 [2.93 GB / 0 free]

PV/dev/sda3 VG rootvg lvm2 [2.93 GB / 0 free]

PV/dev/sda5 VG rootvg lvm2 [2.93 GB / 0 free]

PV /dev/sda6 VG rootvg lvm2 [1.12 GB / 1.12 GB free] 

Total: 4 [9.89 GB] / in use: 4 [9.89 GB] / in no VG: 0 [0 ]

4、LV extend

[[email protected] ~]# lvextend -L +100M/dev/rootvg/homelv

Extending logical volume homelv to 612.00 MB

Logical volume homelv successfully resized

5、using resize2fs

[[email protected] ~]# resize2fs/dev/rootvg/homelv

resize2fs 1.39 (29-May-2006)

Filesystem at /dev/rootvg/homelv is mountedon /home; on-line resizing required

Performing an on-line resize of/dev/rootvg/homelv to 626688 (1k) blocks.

The filesystem on /dev/rootvg/homelv is now626688 blocks long.

[[email protected] ~]# df -h

文件系统 容量 已用 可用 已用% 挂载点

/dev/mapper/rootvg-rootlv

7.6G 2.0G 5.2G 28% /

/dev/sda1 99M 11M 83M 12% /boot

tmpfs 125M 0 125M 0% /dev/shm

/dev/mapper/rootvg-homelv

593M 19M 544M 4% /home

转载于:https://www.cnblogs.com/leon-zhu/p/4285617.html