We also use CentOS 7 on the real machines. This makes life easier, because we only need to know CentOS config style. Of cause you could use other Linux distribution on the real host.
1. Step: Install CentOS 7
2. Step: Install KVM
Required packages:
cat << EOF > /etc/yum.repos.d/qemu-kvm-rhev.repo
[qemu-kvm-rhev]
name=oVirt rebuilds of qemu-kvm-rhev
baseurl=http://resources.ovirt.org/pub/ovirt-4.1/rpm/el7Server/
mirrorlist=http://resources.ovirt.org/pub/yum-repo/mirrorlist-ovirt-4.1-el7Server
enabled=1
skip_if_unavailable=1
gpgcheck=0
EOF
yum install qemu-kvm-rhev libvirt bridge-utils
# qemu-img is not needed