The Percona Monitoring Plugins are high-quality components to add enterprise-grade MySQL monitoring and graphing capabilities to your existing in-house, on-premises monitoring solutions. The components are designed to integrate seamlessly with widely deployed solutions such as Nagios, Cacti and Zabbix.
Home page http://www.percona.com/software/percona-monitoring-plugins
Bug tracker https://bugs.launchpad.net/percona-monitoring-plugins