GroundWork Monitor Open Source 5.1
A complete availability monitoring solution that ensures IT infrastructure uptime while identifying issues before they become real problems. Unifies best-of-breed open source tools – Nagios, Nmap, SNMP TT, PHP, Apache, MySQL and more — through PHP/AJAX-based components and an integrated user interface to deliver the extensible functionality you require.
I finally got around to migrating my old version of GroundWork to the newest version, 5.1. GroundWork is a nice repackaging of Nagios and the 5.1 version includes some basic graphing in the free version via RRD. The paid support version has more sophisticated graphing and reporting and does a better job of interfacing with SNMP. I use the VM appliance since I am using this package to monitor a few web sites. It sends me an email when it sees a problem.
I was planning to write this post after I fixed three alerts, local_mysql_database_nopw, local_process_gw_feeders, and local_process_snmptt, on the local Linux server but I am going to turn these alerts off instead. I found the problems with the feeders(missing perl library) and snmptt was not installed but my fixes did not seem to hold. The system is running fine.