haproxyctl --haproxy command line tool

HAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代 理，支持虚拟主机，它是免费、快速并且可靠的一种解决方案。

如果希望通过命令行模式来disable或者enable，可以使用haproxyctl, haproxyctl的安装使用如下：

Preparation
Install Ruby: yum install ruby

1.Install haproxyctl according to https://github.com/flores/haproxyctl
Note: when running 'ln' command, the full path should be given.

2. Add the following line to /etc/haproxy/haproxy.cfg
stats socket /tmp/haproxy uid haproxy mode 770 level admin

3.Commands:
/etc/init.d/haproxyctl show backends
/etc/init.d/haproxyctl show health
/etc/init.d/haproxyctl enable server static/static
/etc/init.d/haproxyctl disable server static/static