Nagios

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Nagios is an application that monitors systems, networks and infrastructure with alerting capabilities. There is different Nagios agents for collection data are available[1].

Some features of Nagios Core include:[2]

  • Monitoring of network services (SMTP, POP3, HTTP, NNTP, PING, etc.)
  • Monitoring of host resources (processor load, disk usage, etc.)
  • Simple plugin design that allows users to easily develop their own service checks
  • Parallelized service checks
  • Ability to define network host hierarchy using "parent" hosts, allowing detection of and distinction between hosts that are down and those that are unreachable
  • Alerts or contact notifications when service or host problems occur and get resolved (via email, pager, or user-defined method)
  • Ability to define event handlers to be run during service or host events for proactive problem resolution
  • Automatic log file rotation
  • Support for implementing redundant monitoring hosts
  • Optional web interface for viewing current network status, notification and problem history, log file, etc.

Configuration file

  • /etc/nagios3/nagios.cfg


Activities

TCP OK - 0.000 second response time on 127.0.0.1 port 80|time=0.000274s;;;0.000000;10.000000

See also

  • https://en.wikipedia.org/wiki/Nagios#Nagios_agents
  • https://assets.nagios.com/downloads/nagioscore/docs/nagioscore/3/en/about.html#whatis
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