Hi,
i created a small ruby class/script which pulls the desired informations out of OpenNebula (parsing the XML output of onehost list -x ). The desired values are pushed to graphite and i can play with the metrics. Currently there are only some Grafana Dashboards where you can filter for “Top Ressources” (for example “display the most loaded host” or “display the X hosts with most USED_MEM”). The next steps will be to create some graphs for capacity management and develop a nice Dashing.io dashboard for our big screens. Perhaps i will share the informations as a new post at your blog ( http://opennebula.org/blog/ ) - interested?
See some screenshots of the first graphed metrics:
