5 Website Development Tips To Boost Your Business Growth Exponentially

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