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。HAProxy特别适用于那些负载特大的web站点， 这些站点通常又需要会话保持或七层处理。HAProxy运行在当前的硬件上，完全可以支持数以万计的并发连接。

下图是HAProxy的架构：

该版本修复了如下严重的bug:

1. A possible crash when using Cookie-based persistence with appsessions was fixed.
2. Header processing could become wrong after a single reqidel rule removed exactly two headers....
3. Strict aliasing was explicitly disabled to shut down warnings that are emitted with gcc 4.4.
4. Some out-of-memory conditions were not correctly handled in appsession or cookie captures.
5. A native target was added to make builds easier.

强烈建议用户升级。