Alternative 1 : Ceilometer Plugin in Nagios - Plugin can be downloaded from Github:
https://github.com/kobe6661/nagios_ceilometer_plugin.git
- Additionally:
NRPE-Plugin: remote execution of Nagios calls to Ceilometer
Install NRPE on Nagios Core server and server that hosts Ceilometer API
Change nrpe.cfg to include call to VM metric
Alternative 2 : Nagios OpenStack Plugin
