Openstack app is published on Splunkbase and is in final beta stage. GA is planned prior to .conf (by mid-September, 2015). The app has been hardened with direct feedback from several Fortune 500 customers over past two months..
Openstack App: https://splunkbase.splunk.com/app/2843/
Nova TA: https://splunkbase.splunk.com/app/2841/
Ceilometer TA: https://splunkbase.splunk.com/app/2842/
You use the Ceilometer UDP Publisher to forward Openstack metering information collected by Ceilometer to Splunk. The Ceilometer UDP Publisher is designed as one of the ways to integrate with external system. You could alternatively use the Ceilometer API to get to the Ceilometer collected metering info. Just a thought...
Be very nice - getting pushed in this direction...
It would be nice as that's where the world is headed.