1. Monitoring with Nagios
Why monitoring is important
What is Nagios? Main features.
Elements and structure of Nagios config
Notifications and reports
Remote monitoring
Nagios related resources

2. Why monitoring is important
Automatic detection of issues
Improves awareness, thereby security
Pre-emtive decision making
Intervene before issue gets out of hand
It greatly improves on forensics
Result :: a good night's sleep

3. What is Nagios?
Open source monitoring application written by Ethan Galstad twitter.com/#!/fatherofnagios
Binary version available for major distros
Monitoring, notifications, reporting
Easy to extend
Well documented project, sister projects
Number of wrappers for Nagios

4. What Nagios can monitor
Hosts
Services
Logs
Connectivity
Pretty much everything else

5. Getting and installing
Source version available
Binary for all major distros
Available in apt-get and YUM repositories
Nagios3 greatly improves on this
Ubuntu - # sudo apt-get install nagios3
This installs a fully functional Nagios setup

6. Elements and structure of config
Hosts
Hostgroups
Services
Contact / contact groups
Commands
Time periods

7. Nagios web interface http://localhost/nagios3
Simple, clean, and organized
Structured in groups

8. Notifications Email SMS Twitter Asterix
Can be extended to just about anything
Configure automatic action

9. Reporting Availibility Trends Alert history Drawback – can't export
Use tool such as Nareto – nareto.org

10. Remote monitoring Passive checks with NSCA Active checks with NRPE
Monitoring over SSH

11. Logs /var/log/nagios3/nagios.log
Very important tool to make sure all is well
Monitoring at heart of operations

12. Simpler options Open Monitoring Distribution – omdistro.org
Quick and easy installation
Easily create nagios nodes
Great to get your hands dirty

13. Nagios resources Nagios Plugins – nagiosexchange.org
Monitoring tool based on Nagios – centreon.org
Nagios configuration generator – nconf.sf.net
Nagios based monitoring tool – icinga.org

14. About Me SUKRIT DHANDHANIA From Pondicherry, India
Sukritd-at-sevenacross-dot-com
Thanks for attending