keepalived

http://www.keepalived.org/index.html

What is Keepalived ?
Keepalived is a routing software written in C. The main goal of this project is to provide simple and robust facilities for loadbalancing and high-availability to Linux system and Linux based infrastructures.
keepalived是一个用c编写的路由软件。这个项目的主要目标是给linux系统及基于linux架构，提供简单和健壮设施，为了负载平衡与高可用。
Loadbalancing framework relies on well-known and widely used Linux Virtual Server (IPVS) kernel module providing Layer4 loadbalancing.
负载平衡框架依赖于众所周知的和广泛使用的lvs内核模块提供第4层负载平衡。
Keepalived implements a set of checkers to dynamically and adaptively maintain and manage loadbalanced server pool according their health.
keepalived实现了一套检查器根据它们的健康程度来动态和自适应维护管理负载平衡服务器池。
On the other hand high-availability is achieved by VRRP protocol. VRRP is a fundamental brick for router failover. In addition, Keepalived implements a set of hooks to the VRRP finite state machine providing low-level and high-speed protocol interactions.
另一方面来说高可用由VRRP协议来完成。VRRP是路由器故障转移的基石。此外，keepalived实现了一套钩子到VRRP有限状态机提供低级和高速协议交互。
Keepalived frameworks can be used independently or all together to provide resilient infrastructures.
keepalived框架能被独立使用或者集成起来提供有弹性的基础设施。
Keepalived is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.
keepalived是自由软件;你能在由FSF发布GNU GPL的条款下重分发或修改它;不管是许可证版本2还是最新版。

GRAB THE LATEST VERSION!
攫取最新版！
Keepalived main website doesn't offer package for any Linux distribution, it only provides source code and code repository.
keepalived主站不为任何linux发行版提供包，它只提供源码和代码库。
Most of Linux distribution are offering Keepalived package as a mainline package and package maintainers are making a great job maintaining and reporting issues about it.
大多数的linux发行版都将keepalived包作为主流包来提供并且包维护者做了大量关于keepalived维护与报告问题的工作。