nagios Overview

http://www.nagios.org/about/overview

Chapter 1

What is Nagios ?

Nagios is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

Designed with scalability and flexibility in mind, Nagios gives you the peace of mind that comes from knowing your organization's business processes won't be affected by unknown outages.

Nagios is a powerful tool that provides you with instant awareness of your organization's mission-critical IT infrastructure. Nagios allows you to detect and repair problems and mitigate future issues before they affect end-users and customers. 

What Nagios Provides ?

By using Nagios, you can:

• Plan for infrastructure upgrades before outdated systems cause failures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 ?

Monitoring 

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

// 해당 호스트의 네트워크 상황과 기본적인 하드웨어 리소스를 체크 할 수 있다. 

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.

// 경고 기능인데 해당 호스트의 관리자에게 설정된 특정 이벤트 발생시 이메일과 문자로 경고를 날릴 수 있는 시스템이다. 이게 시현을 하면 재미있을거 같다. 스크립트로 설정해서 사용하는 듯 하다. 

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. // 대응까지 만들면 좋지만 쉽지 않을것 같다.

Resporting

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

Maintenace

Scheduled downtime prevents alerts during scheduled maintence and upgrade windows.

Planning 

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

Chapter 2

Nagios Features

Nagios is a powerful monitoring system that enables organizations to identify and resolve IT infrastructure problems before they affect critical business processes.

Features

Comprehensive Monitoring

• Capabilities to monitor applications, services, operating systems, network protocols, system metrics and infrastructure components with a single tool
• Powerful script APIs allow easy monitoring of in-house and custom applications, services, and systems

// Nagios의 Pawerful 한 Script API를 활영해서 Custom application을 만드는게 나의 주 목적이다. 

Visibility 

• Centralized view of entire monitored IT infrastructure
• Detailed status information available through web interface

Awareness

• Fast detection of infrastructure outages
• Alerts can be delivered to technical staff via email or SMS // 이걸로 재미있는 데모를 만들 수 있을거 같다.
• Escalation capabilities ensure alert notifications reach the right people

Problem Remediation

• Alert acknowledgments provide communication on known issues and problem response
• Event handlers allow automatic restart of failed applications and service

Proactive Planning

• Trending and capacity planning addons ensure you're aware of aging infrastructure
• Scheduled downtime allows for alert suppression during infrastructure upgrades

Reporting

• Availability reports ensure SLAs are being met
• Historical reports provide record of alerts, notifications, outages, and alert response
• Third-party addons extend reporting capabilities

Multi-Tenant Capabillities

• Multi-user access to web interface allows stake holders to view infrastructure status
• User-specific views ensures clients see only their infrastructure components

Extendaable Architecture

• Integration with in-house and third-party applications is easy with multiple APIs
• Hundreds of community-developed addons extend core Nagios functionality

Stable, Reliable, and Respected Platfom

• Over 10 years of active development
• Scales to monitor thousands of nodes
• Failover capabilities ensure non-stop monitoring of critical IT infrastructure components
• Multiple awards, media coverage and recognition prove Nagios' value

Vibrant Community

• An estimated 1 million+ users worldwide
• Active community mailing lists provide free support
• Hundreds of community-developed addons extend Nagios' core functionality

Customizable Code

• Open Source Software
• Full access to source code
• Released under the GPL license

nagios screen shot 

http://www.nagios.com/products/nagioscore/screenshots

http://nagios.sourceforge.net/docs/3_0/toc.html