Change virtual disk size¶

On the hypervisor¶

Display disk partition informations :

qemu-img info /path/to/the/disk/vmname.qcow2

Go to that folder

Stop the VM¶

virsh destroy vmname

Backup the disk¶

cp vmname.qcow2 vmname.qcow2.bak

Show disk size¶

qemu-img info vmname.qcow2

Add or substract size¶

qemu-img resize vmname.qcow2 +10G

Copy the disk¶

cp vmname.qcow2 vmname-orig.qcow2

Extend the disk¶

virt-resize --expand /dev/vda2 vmname-orig.qcow2 vmname.qcow2

Check the changes¶

Option 1 : qemu-img info /space/volumes/vmname.qcow2
Option 2 : virt-filesystems --long -h --all -a vmname.qcow2

Start the VM¶

virsh start vmname

Connect to the VM¶

Display partitions informations¶

df -h

Display logical volume informations¶

lvdisplay

Display group volume informations¶

vgdisplay

Extends filesystem size (centos)¶

option 1 : lvextend -L +10G /dev/mapper/centos-root
option 2 : resize2fs /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root

Reboot¶

reboot

On the hypervisor¶

Remove the disk backup¶

rm vmname.qcow2.bak vmname-orig.qcow2