Full versions of libvirt/qemu packages installation

Please make sure that your libvirt supports the virsh blockcommit operation. CentOS distribution requires you to install the full libvirt and qemu-img from the oVirt repository. This can be done like this:
  1. 1.
    Install oVirt repo:
    yum install http://resources.ovirt.org/pub/yum-repo/ovirt-release42.rpm -y
  2. 2.
    Update the packages
    yum update -y
    which should replace qemu related packages with full versions from the oVirt repo.