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How to setup and Install Haproxy..
HaProxy is by far the fastest and best light weight load balancer around in my book. I have been using it for years and will always continue to use it so I have decided to share my installation process and example config files. Nowadays websites need a 99.999% up time which just isn’t possible with 1 standalone server
CentOS 6 already has HAProxy packages available under base repository
On CentOS/RHEL 5:
# rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm
Install HAProxy package using yum package manager from command line interface using following comamnd.
# yum install haproxy
Configuiring Haproxy
The config file for setting up and getting your loadbalancer (Haproxy) working is located in /etc/haproxy/haproxy.cfg
nano /etc/haproxy/haproxy.cfg
#———————————————————————
# Example configuration for a possible web application. See the
# full configuration options online.
#
# http://haproxy.1wt.eu/download/1.4/doc/configuration.txt
#
#———————————————————————
#———————————————————————
# Global settings
#———————————————————————
global
# to have these messages end up in /var/log/haproxy.log you will
# need to:
#
# 1) configure syslog to accept network log events. This is done
# by adding the ‘-r’ option to the SYSLOGD_OPTIONS in
# /etc/sysconfig/syslog
#
# 2) configure local2 events to go to the /var/log/haproxy.log
# file. A line like the following can be added to
# /etc/sysconfig/syslog
#
# local2.* /var/log/haproxy.log
#
log 127.0.0.1 local2
chroot /var/lib/haproxy
pidfile /var/run/haproxy.pid
user haproxy
group haproxy
daemon
nbproc 1
# turn on stats unix socket
stats socket /var/lib/haproxy/stats
#———————————————————————
# common defaults that all the ‘listen’ and ‘backend’ sections will
# use if not designated in their block
#———————————————————————
defaults
#tune.chksize 36384
log global
mode http
option httplog
option dontlognull
retries 3
balance roundrobin
option redispatch
option forwardfor
option forceclose # Slows the connection
maxconn 10000
contimeout 30000
clitimeout 40000
srvtimeout 55000
stats enable # enables you to see the stats from a webpage
stats auth admin:98!n567ehny!&*
#———————————————————————
# main frontend which proxys to the backends
#———————————————————————
option httpchk GET /index.php HTTP/1.1\r\nHost:\ www.cyfordtechnologies.com
frontend all 0.0.0.0:80 # Listens on all ip address on port 80
reqidel ^X-Forwarded-For:.* # It uses the client ip address instead of letting the webserver know the request came from haproxy.. good more analysing web traffic
option forwardfor
acl acl_mail.cyfordtechnologies.com hdr_dom(host) -i mail.cyfordtechnologies.com
acl acl_www.cyfordtechnologies.com hdr_dom(host) -i www.cyfordtechnologies.com
acl acl_seo.cyfordtechnologies.com hdr_dom(host) -i seo.cyfordtechnologies.com
acl acl_Extranet.cyfordtechnologies.com hdr_dom(host) -i Extranet.cyfordtechnologies.com
acl acl_genconinc.net hdr_dom(host) -i genconinc.net
acl acl_www.heavensgateguild.com hdr_dom(host) -i heavensgateguild.com
acl acl_test.cyfordtechnologies.com hdr_dom(host) -i test.cyfordtechnologies.com
acl acl_extendeucandvraptoday.com hdr_dom(host) -i extendeucandvraptoday.com
acl acl_lifesbasics.net hdr_dom(host) -i lifesbasics.net
acl acl_lifesbasics.org hdr_dom(host) -i lifesbasics.org
acl acl_todayssocialissues.com hdr_dom(host) -i todayssocialissues.com
acl acl_sample.cyfordtechnologies.com hdr_dom(host) -i sample.cyfordtechnologies.com
acl acl_sample.cyfordtechnologies.com hdr_dom(host) -i onlinemerchantshop.com
acl acl_sample.cyfordtechnologies.com hdr_dom(host) -i gottires.com
use_backend www.cyfordtechnologies.com if acl_www.cyfordtechnologies.com
use_backend mail.cyfordtechnologies.com if acl_mail.cyfordtechnologies.com
use_backend www.cyfordtechnologies.com if acl_seo.cyfordtechnologies.com
use_backend www.cyfordtechnologies.com if acl_Extranet.cyfordtechnologies.com
use_backend www.cyfordtechnologies.com if acl_genconinc.net
use_backend Hosting if acl_www.heavensgateguild.com
use_backend www.cyfordtechnologies.com if acl_test.cyfordtechnologies.com
use_backend Hosting if acl_extendeucandvraptoday.com
use_backend Hosting if acl_lifesbasics.net
use_backend Hosting if acl_lifesbasics.org
use_backend Hosting if acl_todayssocialissues.com
use_backend www.cyfordtechnologies.com if acl_sample.cyfordtechnologies.com
#———————————————————————
# round robin balancing between the various backends
#———————————————————————
# I use mynmain websites in the first pool and usually seperate clients and others incase they move around or mine move around. i also load balanced a couple of reverse proxy servers. which uses port 3128
# Of course you would need to change the ip address to the ip of your servers
backend www.cyfordtechnologies.com
balance roundrobin
cookie SRVID insert indirect nocache
server 01-CachServer_www.cyfordtechnologies.com-3128 192.168.22.8:3128 weight 10 maxconn 200 check inter 10500
server 00-CachServer_www.cyfordtechnologies.com-3128 192.168.22.7:3128 weight 10 maxconn 200 check inter 10500
server 01-CachServer_www.cyfordtechnologies.com-80 192.168.22.8:80 weight 17 maxconn 200 check inter 10500
server 00-CachServer_www.cyfordtechnologies.com-80 192.168.22.7:80 weight 17 maxconn 200 check inter 10500
server web00_www.cyfordtechnologies.com 192.168.22.150:80 cookie SRVID weight 15 maxconn 100 check inter 15000
server web01_www.cyfordtechnologies.com 192.168.22.151:80 cookie SRVID weight 15 maxconn 100 check inter 15000
server web02_www.cyfordtechnologies.com 192.168.22.152:80 cookie SRVID weight 50 maxconn 100 check inter 15000
#server HostMonster_www.cyfordtechnologies.com 74.220.22.77:80 cookie SRVID weight 5 maxconn 5 check backup inter 15000
option redispatch # send back to dispatch in case of connection failure
#option abortonclose
option forceclose
backend www.gottires.com
balance roundrobin
cookie SRVID insert indirect nocache
server www.gottires.com 192.168.111.32:80 cookie SRVID weight 15 maxconn 100 check inter 15000
#server HostMonster_www.cyfordtechnologies.com 74.220.215.77:80 cookie SRVID weight 5 maxconn 5 check backup inter 15000
option redispatch # send back to dispatch in case of connection failure
#option abortonclose
option forceclose
backend Hosting
balance roundrobin
cookie SRVID insert indirect nocache
server web00_www.cyfordtechnologies.com 192.168.44.150:80 cookie SRVID weight 15 maxconn 100 check inter 15000
server web01_www.cyfordtechnologies.com 192.168.44.151:80 cookie SRVID weight 15 maxconn 100 check inter 15000
server web02_www.cyfordtechnologies.com 192.168.44.152:80 cookie SRVID weight 50 maxconn 100 check inter 15000
#server HostMonster_www.cyfordtechnologies.com 74.220.215.77:80 cookie SRVID weight 5 maxconn 5 check backup inter 15000
option redispatch # send back to dispatch in case of connection failure
#option abortonclose
option forceclose
backend mail.cyfordtechnologies.com
server srv_mail.cyfordtechnologies.com 192.168.22.110:80 weight 10 maxconn 100 inter 20000
option abortonclose
backend www.heavensgateguild.com
server 00-CachServer_www.cyfordtechnologies.com-3128 192.168.33.7:3128 weight 10 maxconn 200 check inter 10500
server 01-CachServer_www.cyfordtechnologies.com-3128 192.168.33.8:3128 weight 10 maxconn 200 check inter 10500
server web_www.cyfordtechnologies.com 192.168.33.150:80 cookie SRVID weight 9 maxconn 100 check backup inter 15000
option abortonclose
option redispatch
Start Haproxy and make it start with system boot
# service haproxy start ; chkconfig haproxy on
Published on: Mar 03, 2021
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