#
## Logon to KVM host
#
#
## Resize guest volume:
#
# If LVM guest volume:
lvextend +50G /dev/vg_kvm/ubuntu
# If qemu guest volume
qemu-img resize ubuntu.qcow2 +50G
#
## Refresh storage pool :
#
virsh pool-refresh vg_kvm
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## Logon to KVM guest
#
#
## Check actual disk layout:
#
root@ubuntu:/# fdisk -l
Disk /dev/vda: 107.4 GB, 107374182400 bytes
16 heads, 63 sectors/track, 208050 cylinders, total 209715200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043482
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501758 209713151 104605697 5 Extended
/dev/vda5 501760 209713151 104605696 8e Linux LVM
Disk /dev/mapper/ubuntu-root: 98.6 GB, 98612281344 bytes
255 heads, 63 sectors/track, 11988 cylinders, total 192602112 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/ubuntu-root doesn’t contain a valid partition table
Disk /dev/mapper/ubuntu-swap_1: 8480 MB, 8480882688 bytes
255 heads, 63 sectors/track, 1031 cylinders, total 16564224 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000
Disk /dev/mapper/ubuntu-swap_1 doesn’t contain a valid partition table
root@ubuntu:~# fdisk /dev/vda
Command (m for help): p
Disk /dev/vda: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043482
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501758 209713151 104605697 5 Extended
/dev/vda5 501760 209713151 104605696 8e Linux LVM
Command (m for help): d
Partition number (1-5): 5
Command (m for help): n
root@ubuntu:~# fdisk /dev/vda
Command (m for help): p
Disk /dev/vda: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043482
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501758 209713151 104605697 5 Extended
/dev/vda5 501760 209713151 104605696 8e Linux LVM
#
## Edit disk layout, delete LVM and Extended partition
#
Command (m for help): d
Partition number (1-5): 5
Command (m for help): d
Partition number (1-5): 2
#
## Recreate LVM partition
#
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (1-4, default 2):
Using default value 2
First sector (499712-314572799, default 499712): 501760
Last sector, +sectors or +size{K,M,G} (501760-314572799, default 314572799):
Using default value 314572799
Command (m for help): p
Disk /dev/vda: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043482
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501760 314572799 157035520 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: 161.1 GB, 161061273600 bytes
16 heads, 63 sectors/track, 312076 cylinders, total 314572800 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00043482
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 499711 248832 83 Linux
/dev/vda2 501760 314572799 157035520 8e Linux LVM
#
## Reboot
#
reboot
#
## Resize PV
#
root@ubuntu:~# pvresize /dev/vda2
Physical volume “/dev/vda2” changed
1 physical volume(s) resized / 0 physical volume(s) not resized
#
## Extend LV
#
root@ubuntu:~# lvextend -L +30G /dev/ubuntu/root
Extending logical volume root to 121.84 GiB
Logical volume root successfully resized
#
## Resize filesysten
#
root@ubuntu:~# resize2fs /dev/ubuntu/root
resize2fs 1.42 (29-Nov-2011)
Filesystem at /dev/ubuntu/root is mounted on /; on-line resizing required
old_desc_blocks = 6, new_desc_blocks = 8
Performing an on-line resize of /dev/ubuntu/root to 31939584 (4k) blocks.
The filesystem on /dev/ubuntu/root is now 31939584 blocks long.
#
## Check free space
#
root@ubuntu:~# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/ubuntu-root 122G 76G 40G 66% /
udev 3.9G 4.0K 3.9G 1% /dev
tmpfs 1.6G 260K 1.6G 1% /run
none 5.0M 0 5.0M 0% /run/lock
none 3.9G 0 3.9G 0% /run/shm
/dev/vda1 228M 49M 168M 23% /boot
smtlaqnap1.garda.ca:/GARDA/home 55T 14T 41T 25% /home
root@ubuntu:~#