The installation of CloudKitty from DevStack is pretty straightforward. Just add the following lines to your local.conf file.
[[local|localrc]]
# ceilometer
enable_plugin ceilometer https://git.openstack.org/openstack/ceilometer.git master
# horizon
enable_service horizon
# cloudkitty
enable_plugin cloudkitty https://git.openstack.org/openstack/cloudkitty.git master
enable_service ck-api ck-proc