Tuesday, March 4, 2025

Xymon Monitoring System - Overview & Setup Guide

1. Understanding Xymon Architecture

Xymon consists of three main components:

1. Xymon Server (Big Brother Server) – The central monitoring system that collects and displays data.

2. Xymon Clients – Agents installed on monitored machines to send health and performance data.

3. Web Interface – A dashboard that provides a color-coded status overview.


2. Setting Up Xymon

A. Install Xymon Server (on Linux)

1. Update System Packages

sudo apt update && sudo apt upgrade -y   # For Debian/Ubuntu
sudo yum update -y                        # For RHEL/CentOS


2. Install Required Dependencies

sudo apt install -y xymon apache2 rrdtool librrd-dev libpcre3-dev libssl-dev

3. Download and Install Xymon

wget https://sourceforge.net/projects/xymon/files/latest/download -O xymon.tar.gz
tar -xzf xymon.tar.gz
cd xymon-*
./configure --prefix=/opt/xymon
make && sudo make install

4. Start Xymon Server

sudo /opt/xymon/server/bin/xymon.sh start

5. Access Web Dashboard

Open a browser and go to http://<server-ip>/xymon

B. Install Xymon Client (on Monitored Machines)

1. Install Required Packages

sudo apt install -y xymon-client

2. Configure Client to Send Data to Xymon Server
Edit the configuration file:

sudo nano /etc/default/xymon-client

Set the XYMONSERVERS variable to point to the Xymon server’s IP:

XYMONSERVERS="192.168.1.100"


3. Restart the Client

sudo systemctl restart xymon-client


3. Understanding the Web Dashboard

Green = OK

Yellow = Warning

Red = Critical

Blue = Test disabled

Purple = No report received

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