1.yum安装
wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
rpm -ivh epel-release-6-8.noarch.rpm
yum install -y haproxy


2.配置文件
vi /etc/haproxy/haproxy.cfg

3.配置查看状态网址
defaults
    mode                    http
    log                     global
    option                  httplog
    option                  dontlognull
    option http-server-close
    option forwardfor       except 127.0.0.0/8
    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
    #查看状态网址
    stats   uri             /haproxy-stats


4.配置监听端口:
#前端监听端口,及后端代理配置
frontend  main *:80
    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

5.后端配置
#静态文件配置
backend static
    #轮询
    balance     roundrobin
    server      static 127.0.0.1:4331 check

#默认配置
backend app
    #健康状态检测
    option httpchk HEAD /index.html HTTP/1.0   
    balance     roundrobin
    server  app1 192.168.1.102:80 check
    server  app2 192.168.1.105:80 check


Haproxy 配置项\配置实例
参考文章:http://www.cnblogs.com/dkblog/archive/2012/03/13/2393321.html