Server DIY – How To Set Up A Load Balanced High-Availability Apache Cluster!

max — Thu, 26 Mar 2009 03:32:04 +0000

Well, here’s another way to setup a load balanced, high-availability apache cluster, this will be very informative if you are a webmaster working on high-trafficking sites.

This tutorial shows how to set up a two-node Apache web server cluster that provides high-availability. In front of the Apache cluster we create a load balancer that splits up incoming requests between the two Apache nodes. Because we do not want the load balancer to become another “Single Point Of Failure”, we must provide high-availability for the load balancer, too. Therefore our load balancer will in fact consist out of two load balancer nodes that monitor each other using heartbeat, and if one load balancer fails, the other takes over silently.

via howtoforge

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Server DIY – How To Set Up A Load Balanced High-Availability Apache Cluster!

Linux Server Hack – How to setup a Shell Script to Auto Restart Apache Httpd Server!

max — Mon, 28 Jul 2008 20:21:49 +0000

Well, I have been struggling with one of my dedicated servers and just found this cool script that will auto-restart the Apache httpd server if it goes out.

Save the following as restart.sh:

#!/bin/bash
# Apache Process Monitor
# Restart Apache Web Server When It Goes Down
# -------------------------------------------------------------------------
# Copyright (c) 2003 nixCraft project 
# This script is licensed under GNU GPL version 2.0 or above
# -------------------------------------------------------------------------
# This script is part of nixCraft shell script collection (NSSC)
# Visit http://bash.cyberciti.biz/ for more information.
# -------------------------------------------------------------------------
# RHEL / CentOS / Fedora Linux restart command
RESTART="/sbin/service httpd restart"

# uncomment if you are using Debian / Ubuntu Linux
#RESTART="/etc/init.d/apache2 restart"

#path to pgrep command
PGREP="/usr/bin/pgrep"

# Httpd daemon name,
# Under RHEL/CentOS/Fedora it is httpd
# Under Debian 4.x it is apache2
HTTPD="httpd"

# find httpd pid
$PGREP ${HTTPD}

if [ $? -ne 0 ] # if apache not running
then
 # restart apache
 $RESTART
fi

Then setup a cron job like this: (usually in your sa-update file under /etc/cron.d)

*/5 * * * * root /root/restart.sh >/dev/null 2>&1

via cyberciti

There’s also a program called Monit that will do more automation.

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Linux Server Hack – How to setup a Shell Script to Auto Restart Apache Httpd Server!

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Server DIY – How To Set Up A Load Balanced High-Availability Apache Cluster!

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