Add a directory as a storage pool

# virsh pool-list --all
# virsh pool-define-as storage01 --type dir --target /mnt/storage01/vm
# virsh pool-start storage01
# virsh pool-autostart storage01
# virsh pool-list --all

Remove a directory storage pool

Verify the pool is not in use
  # virsh pool-list --all
  # lsof | grep storage01
Remove the pool
  # virsh pool-list --all
  # virsh pool-destroy storage01
  # virsh pool-undefine storage01
  # virsh pool-list --all

Create a qemu disk image

Create a 40GB QCOW2 image:
# qemu-img create -f qcow2 -o compat=1.1 windows.qcow2 40000000000

Convert a vmdk disk image to a qcow2 disk image

# qemu-img convert -p -O qcow2 -o compat=1.1 windows.vmdk windows.qcow2

Live Migrate a VM from one storage pool to another (does not delete the original source qcow2 file)

Backup the XML just in case:
  # virsh dumpxml --inactive windows > ~/windows.xml.backup
Migrate the disk volume:
  # virsh undefine windows
  # virsh blockcopy windows /mnt/storage01/vm/windows.qcow2 /mnt/storage02/vm/windows.qcow2 --wait --verbose --pivot
  # virsh dumpxml windows > ~/windows.xml
  # virsh define ~/windows.xml
Cleanup
  Verify that the qcow2 file is opened in the new location and not the old location
  # lsof | grep windows
  Remove the temporary files
  # rm /mnt/storage01/vm/windows.qcow2
  # rm ~/windows.xml
  # rm ~/windows.xml.backup
Done

Rename a domain

Shutdown the domain
# virsh dumpxml windows > ~/windows.xml
Edit the xml file and rename the domain
# virsh undefine windows
# virsh define ~/windows.xml
Power on the domain
# rm ~/windows.xml