Difference between revisions of "Nagios"

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# Run a manual test: /usr/lib/nagios/plugins/check_tcp -H 127.0.0.1 -p 80
 
# Run a manual test: /usr/lib/nagios/plugins/check_tcp -H 127.0.0.1 -p 80
:TCP OK - 0.000 second response time on 127.0.0.1 port 80|time=0.000274s;;;0.000000;10.000000
+
:<code>TCP OK - 0.000 second response time on 127.0.0.1 port 80|time=0.000274s;;;0.000000;10.000000</code>
  
 
== See also ==
 
== See also ==

Revision as of 13:50, 12 December 2019

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

  1. Read Nagios core changelog: https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog
  2. Install Nagios Core using docker: docker pull jasonrivers/nagios && docker run --name nagios4 -p 0.0.0.0:8080:80 jasonrivers/nagios:latest and connect to http://localhost:8080 using nagiosadmin / nagios or apt install nagios3


  1. Run a manual test: /usr/lib/nagios/plugins/check_tcp -H 127.0.0.1 -p 80
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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