Adjust the disk size of a KVM Virtual Machine

Adjust the disk size of a KVM Virtual Machine

By default, the hard disk images of KVM virtual machines are stored in "/var/lib/libvirt/images/". First, check whether your hard disk image format is in RAW format:

Qemu-img info/var/lib/libvirt/images/Template-CentOS-6.6-32bit.img

Is the result after I run the command:

We can see that the hard disk image of this virtual machine is in RAW format and meets the requirements. Next, we will try to resize it.

Qemu-img resize/var/lib/libvirt/images/Template-CentOS-6.6-32bit.img + 2G

Is the result after I run the command:

We can see that the hard disk size has been adjusted successfully, but it takes effect only after being restarted.

After the reboot, The fdisk command shows that the adjustment was successful. See:

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