What is Nagios ?

What is Nagios ?


First introduced in 1999, Nagios has developed to incorporate a huge number of activities/projects created by the global Nagios network. Nagios is supported by Nagios Enterprises, which help the network in various manners through trades of its business items and services.

What is Nagios?

Nagios is defined as a tool for framework monitoring which regularly checks the position of machines and different services on the machines. The fundamental reason for framework monitoring is to distinguish and give an account of any framework that is not working appropriately, as quickly as possible, so that, you know about the issue before the user keeps running into it.

Nagios does not accomplish any host or administration monitoring on its own. It utilizes modules or plugins to conduct real checks. This marks it a flexible and adaptable key for conducting machine/service checks.

Benefits of Using Nagios

Executing viable server monitoring using Nagios gives the below-given benefits:

ü Scales fine for basic and fixed arrangements.
ü Straightforward plugin design/architecture.
ü Splits struggle to look after compatibility.
ü Straightforward pattern language.
ü Incredible system of plugins to broaden the usefulness

Drawbacks of Using Nagios

Here are some of the drawback of using Nagios:

ü Significant components such as wizards or interactive dashboard is only accessible on Nagios XI, which is costly.
ü Nagios-core contains a complex interface.
ü There are numerous setup documents which are difficult to design for clients.
ü Nagios cannot check network data.
ü It does not enable you to deal with the system, however, it just permits you to observe the system.
ü Nagios does not differentiate between gadgets (e.g. servers, switches, or routers) as it deals with each gadget being a host.

Nagios Architecture

The below-given points are significant to be considered about Nagios architecture:

1)     Nagios comprises of server-agent architecture.

2)     Nagios server is introduced to the host and plugins are introduced to the remote hosts (or servers) which are to be observed.

3)     Nagios conducts an indication by means of a process scheduler to operate the plugins on the hosts (or servers).

4)     Plugins gather the information (CPU use, memory utilization and so forth.) and return it to the scheduler.

5)    After that, the process scheduler shows the notice to the administrator/s and apprises Nagios GUI.

Nagios Architecture
Nagios Architecture

The below-given figure is explaining Nagios Server-Agent Architecture:

Nagios Server-Agent Architecture
Nagios Server-Agent Architecture

Components of Nagios

A Nagios checking/monitoring arrangement comprises of various segments, as demonstrated as follows:

Nagios Components
Nagios Components



My Name is Ankur Jain and I am currently working as Automation Test Architect.I am ISTQB Certified Test Manager,Certified UI Path RPA Developer as well as Certified Scrum Master with total 12 years of working experience with lot of big banking clients around the globe.I love to Design Automation Testing Frameworks with Selenium,Appium,Protractor,Cucumber,Rest-Assured, Katalon Studio and currently exploring lot in Dev-OPS as well. I am currently staying in Mumbai, Maharashtra. Please Connect with me through Contact Us page of this website.

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