HAproxy.txt

HAProxy
=======

wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm

1. yum install haproxy

2. vi /etc/haproxy/haproxy.cfg

Layer 4
=======

frontend webapp1
         bind 192.168.1.250:80
         default_backend webapp1-servers
		
backend webapp1-servers
        balance roundrobin leastconn source uri
        mode tcp
        server webserver1 192.168.1.21:80
        server webserver2 192.168.1.22:80
		
		server webserver2 192.168.1.22:80 check
		server webserver2 192.168.1.22:80 disabled
		
Layer 7
=======

frontend webapp1
         bind 192.168.1.250:80
         mode http
         acl url_forum      path_beg     /forum
         use_backend webapp1_forum if url_forum
         default_backend webapp1_main
		 
backend webapp1_main
         mode http
         balance roundrobin
         server webserver1 192.168.1.21:80
		 server webserver1 192.168.1.22:8080
		 
backend webapp1_forum
         mode http
         balance roundrobin
         server webserver3 192.168.1.23:80
         server webserver4 192.168.1.24:80