Monitoring / trending tools

Hello all, We all know the importance of monitoring and trending, but there's a lot of tools so I'd like to start the thread to look into those. = Munin = Mostly meant for trending, though you can use the limits part to notify on limits. == Pros == * Easy to deploy * Good puppet module available at https://github.com/duritong/puppet-munin == Cons == * ??? = Nagios = = Icinga = = Zabbix = = Ganglia =