Observium

Observium is a Network Observation and Monitoring System (NOMS) which collects data from devices using SNMP and presents it via a web interface. It is based on the PHP programming language and the MySQL database, and makes heavy use of the RRDtool package. Observium has a number of simple core design goals driving its development: minimum interaction, maximum automation and maximum accessibility of information. These design goals have resulted in a slightly unconventional monitoring system with almost no individually customisable settings per device, and where almost everything that can be monitored is automatically discovered.
Features
Observium aims to supplement other network monitoring projects such as Nagios or Cacti with greater understanding of certain devices and technologies. For this reason it's common to see Observium deployed alongside Nagios or Mon to provide alerting and Cacti to provide customised graphing of arbitrary metrics.
History
Observium originated from code written by Adam Armstrong to map the topology of a network from CDP data, when he started in a new job with an unfamiliar network environment. It was inspired by software written by a colleague in a previous job, which allowed click-through navigation from device to device through a network topology. Observium has changed names a few times from Project Observer (2006-2008) to ObserverNMS (2008-2010) and finally to Observium.
 
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