HAproxy Document

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                                         HAproxy Document.
    I have use 2 machine and running OS is RHEL6.4 or CentOS 6.4.64Bit

Machine Details
IP 192.168.0.100 Hostname node1.example.com
IP 192.168.0.101 Hostname node2.example.com
Virtual IP 192.168.0.200

# yun install haproxy httpd* -y (in both Machine node1 and node2)

Configure httpd
NODE1
# vim /etc/httpd/conf/httpd.conf
Listen 192.168.0.100:8080
ServerName example.com

# vim /var/www/html/index.html
haproxy node1

# /etc/init.d/httpd  restart
# chkconfig httpd on

NODE2
# vim /etc/httpd/conf/httpd.conf
Listen 192.168.0.101:8080
ServerName example.com

# vim /var/www/html/index.html
haproxy node2
# /etc/init.d/httpd  restart
# chkconfig httpd on

# cp  /etc/haproxy/haproxy.cfg  /etc/haproxy/haproxy.cfg-ORG ( copy haproxy.conf file backup in both machine node1 and node2 )

configure haproxy node1 Server
# vim /etc/haproxy/haproxy.cfg

global

 log         192.168.0.200 local2 debug

    chroot      /var/lib/haproxy
    pidfile     /var/run/haproxy.pid
    maxconn     4096
    user        haproxy
    group       haproxy
    daemon

    # 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
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
#    option http-server-close
    option forwardfor     
    option                  redispatch
    retries                 3
    timeout http-request    10s
    timeout queue           1m
    timeout connect         10s
    timeout client          1m
    timeout server          1m
    timeout http-keep-alive 10s
    timeout check           10s
    maxconn                 3000

#---------------------------------------------------------------------
# main frontend which proxys to the backends
#---------------------------------------------------------------------
#frontend  main *:5000
#    acl url_static       path_beg       -i /static /images /javascript /stylesheets
#    acl url_static       path_end       -i .jpg .gif .png .css .js

#    use_backend static          if url_static
#    default_backend             app

#---------------------------------------------------------------------
# static backend for serving up images, stylesheets and such
#---------------------------------------------------------------------
#backend static
#    balance     roundrobin
#    server      static 127.0.0.1:4331 check

#---------------------------------------------------------------------
# round robin balancing between the various backends
#---------------------------------------------------------------------
#backend app
#    balance     roundrobin
#    server  app1 127.0.0.1:5001 check
#    server  app2 127.0.0.1:5002 check
#    server  app3 127.0.0.1:5003 check
#    server  app4 127.0.0.1:5004 check

listen  Haproxy-APP 192.168.0.200:80
        balance roundrobin
        option httpclose
       # option forwardfor
        option forwardfor header X-Real-IP
        server  APPSERVER1 192.168.0.100:8080 check 
        server  APPSERVER2 192.168.0.101:8080 check  

listen admin
    bind *:5050
    stats enable
    stats realm Haproxy\ Statistics
    stats uri /
    stats auth admin:wapstatus@123


# scp /etc/haproxy/haproxy.cfg 192.168.0.101:/etc/haproxy/haproxy.cfg

# cd /etc/sysconfig/network-scripts/
# cp ifcfg-eth0 ifcfg-eth0:0
# vim ifcfg-eth0:0

DEVICE=eth0:0
HWADDR=08:00:27:02:01:35
TYPE=Ethernet
UUID=be6391e4-9ce2-4a6f-b1dd-105a3af4666b
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=static
IPADDR=192.168.0.200
NETMASK=255.255.255.0

# ifup eth0:0
# /etc/init.d/haproxy  restart






Test
go to Browser and type ( http://192.168.0.200 )

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