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Linux – KVM Guest LVM Disk Resize


[[email protected] ~]# df
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
1779856   1553320    138068  92% /
/dev/vda1               101086     40798     55069  43% /boot
tmpfs                   513060         0    513060   0% /dev/shm
[[email protected] ~]# vgscan
Reading all physical volumes.  This may take a while...
Found volume group "VolGroup00" using metadata type lvm2
[[email protected] ~]# fdisk /dev/vda
vda   vda1  vda2
[[email protected] ~]# fdisk /dev/vda

Command (m for help): p

Disk /dev/vda: 4219 MB, 4219469824 bytes
255 heads, 63 sectors/track, 512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           1          13      104391   83  Linux
/dev/vda2              14         382     2963992+  8e  Linux LVM

Command (m for help): d
Partition number (1-4): 2

Command (m for help): p

Disk /dev/vda: 4219 MB, 4219469824 bytes
255 heads, 63 sectors/track, 512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           1          13      104391   83  Linux

Command (m for help): n
Command action
e   extended
p   primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (14-512, default 14):
Using default value 14
Last cylinder or +size or +sizeM or +sizeK (14-512, default 512):
Using default value 512

Command (m for help): p

Disk /dev/vda: 4219 MB, 4219469824 bytes
255 heads, 63 sectors/track, 512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           1          13      104391   83  Linux
/dev/vda2              14         512     4008217+  83  Linux

Command (m for help): t
Partition number (1-4): 2
Hex code (type L to list codes): 8e
Changed system type of partition 2 to 8e (Linux LVM)

Command (m for help): p

Disk /dev/vda: 4219 MB, 4219469824 bytes
255 heads, 63 sectors/track, 512 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot      Start         End      Blocks   Id  System
/dev/vda1   *           1          13      104391   83  Linux
/dev/vda2              14         512     4008217+  8e  Linux LVM

Command (m for help): w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
The kernel still uses the old table.
The new table will be used at the next reboot.
Syncing disks.
[[email protected] ~]# reboot

Broadcast message from root (pts/0) (Sat Sep 15 23:36:59 2012):

The system is going down for reboot NOW!
[[email protected] ~]# Connection to pbx01.mil1.wide-net.org closed by remote host.
Connection to pbx01.mil1.wide-net.org closed.
[[email protected] ~]$

 

 

[[email protected] ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/vda2
VG Name               VolGroup00
PV Size               2.83 GB / not usable 14.52 MB
Allocatable           yes
PE Size (KByte)       32768
Total PE              90
Free PE               26
Allocated PE          64
PV UUID               3KFfOG-kfJZ-hNtT-0vo5-Lpzk-4iMR-rMmLzH

[[email protected] ~]# pvresize /dev/vda2
Physical volume "/dev/vda2" changed
1 physical volume(s) resized / 0 physical volume(s) not resized
[[email protected] ~]# pvdisplay
--- Physical volume ---
PV Name               /dev/vda2
VG Name               VolGroup00
PV Size               3.82 GB / not usable 10.09 MB
Allocatable           yes
PE Size (KByte)       32768
Total PE              122
Free PE               58
Allocated PE          64
PV UUID               3KFfOG-kfJZ-hNtT-0vo5-Lpzk-4iMR-rMmLzH

[[email protected] ~]# lvdisplay
--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol00
VG Name                VolGroup00
LV UUID                f134eo-A1TY-mj72-g16E-oBnl-fnNM-4hULDC
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                1.75 GB
Current LE             56
Segments               2
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           252:0

--- Logical volume ---
LV Name                /dev/VolGroup00/LogVol01
VG Name                VolGroup00
LV UUID                1gNpNl-ypNO-bj4a-Gsyb-eGnS-UcFh-Rbocfj
LV Write Access        read/write
LV Status              available
# open                 1
LV Size                256.00 MB
Current LE             8
Segments               1
Allocation             inherit
Read ahead sectors     auto
- currently set to     256
Block device           252:1

[[email protected] ~]# lvresize /dev/VolGroup00/LogVol00 -l +1
Extending logical volume LogVol00 to 3.59 GB
Insufficient free space: 1 extents needed, but only 0 available
[[email protected] ~]# resize2fs /dev/VolGroup00/LogVol00
resize2fs 1.39 (29-May-2006)
Filesystem at /dev/VolGroup00/LogVol00 is mounted on /; on-line resizing required
Performing an on-line resize of /dev/VolGroup00/LogVol00 to 933888 (4k) blocks.
The filesystem on /dev/VolGroup00/LogVol00 is now 933888 blocks long.

[[email protected] ~]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
3.5G  1.5G  1.8G  46% /
/dev/vda1              99M   40M   54M  43% /boot
tmpfs                 502M     0  502M   0% /dev/shm
[[email protected] ~]# reboot

Broadcast message from root (pts/0) (Sat Sep 15 23:43:32 2012):

The system is going down for reboot NOW!
[[email protected] ~]#

Category: Linux, Tech

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