1. Install Haproxy 
   CentOS/RHEL 5 , 32 bit:
   # rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm 
   CentOS/RHEL 5 , 64 bit:
   # rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm 
   CentOS/RHEL 6 , 32 bit:
   # rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm 
   CentOS/RHEL 6 , 64 bit:
   # rpm -Uvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
   yum -y install haproxy
2. Configure Haproxy
   vi /etc/haproxy/haproxy.cfg
   global        log 127.0.0.1   local0        log 127.0.0.1   local1 debug        maxconn   45000 # Total Max Connections.        daemon        nbproc      1 # Number of processing cores. defaults        log     global        mode    http        option  httplog        option  dontlognull        retries 3        option redispatch        maxconn 20000        timeout server 86400000        timeout connect 86400000        timeout client 86400000        timeout queue   1000s        # [HTTP Site Configuration]listen  http_web 10.10.0.112:80        mode http        balance roundrobin  # Load Balancing algorithm        option httpchk        option forwardfor        server server1 23.253.48.253:80 weight 1 maxconn 512 check        server server2 208.43.40.162:80 weight 1 maxconn 512 check# [Change HAProxy Stats URL]listen  stats   10.10.0.112:1936        mode            http        log             global        balance roundrobin        maxconn 10        timeout server 86400000        timeout connect 86400000        timeout client 86400000        timeout queue   1000s        stats enable        stats hide-version        stats refresh 30s        stats show-node        stats realm Haproxy\ Statistics        stats auth admin:password        stats uri  /ha-stats
   开启防火墙 1936 端口
3. 重启相关服务
   service iptables restart 
   service haproxy restart
   chkconfig haproxy on
4. 后台查看网站：
   http://10.10.0.112:1936/ha-stats  or  http://10.10.0.112:1936/stats
5. 参考链接：