Virt-resize

External

• https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Guest_virtual_machine_disk_access_with_offline_tools-virt_resize_resizing_guest_virtual_machines_offline.html

Internal

• Linux Virtualization Operations

Overview

Use it to resize virtual machine disks, and resize or delete any partitions on the virtual machine disk. It works by copying the guest image and leaving the original disk image untouched. Do not use it on running virtual machines.