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What is a Nagios ?

Nagios is open source  monitoring engine and very powerful tool that provides you with instant awareness of your organization’s mission-critical IT infrastructure.
In Other words, Nagios will help you to know about your infrastructure in a very detail way. It  allows you to detect and repair problems and mitigate future issues before they affect end-users and customers. For an example, If you are dealing with the hundreds of servers. And you want ease in life so this is perfect solution for you. It will help you know about your n/w failure or your H/w failure and many more.

Benefits of Nagios:-- 


• Plan for infrastructure upgrades before outdated systems cause failures

• Respond to issues at the first sign of a problem

• Automatically fix problems when they are detected

• Coordinate technical team responses

• Ensure your organization’s SLAs are being met

• Ensure IT infrastructure outages have a minimal effect on your organization’s bottom line

• Monitor your entire infrastructure and business processes


How it Works:--


1) Monitoring : IT staff configure Nagios to monitor critical IT infrastructure components, including system metrics, network protocols, applications, services, servers, and network infrastructure.

2) Response : IT staff can acknowledge alerts and begin resolving outages and investigating security alerts immediately. Alerts can be escalated to different groups if alerts are not acknowledged in a timely manner.

3) Maintenance : Scheduled downtime prevents alerts during scheduled maintenance and upgrade windows.

4) Alerting : Nagios sends alerts when critical infrastructure components fail and recover, providing administrators with notice of important events. Alerts can be delivered via email, SMS, or custom script.

5) Reporting : Reports provide a historical record of outages, events, notifications, and alert response for later review. Availability reports help ensure your SLAs are being met.

6)Planning : Trending and capacity planning graphs and reports allow you to identify necessary infrastructure upgrades before failures occur.


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