摘要:集群技术是一种通用的技术，其目的是为了解决单机运算能力的不足、IO能力的不足、提高服务的可靠性、获得规模可扩展能力，降低系统整体的运行、升级、维护成本。只要在其他技术不能达到以上的目的情况下，或者虽然能够达到以上的目的，但是成本过高的情况下，就可以考虑采用集群技术，达到高性能、高可用，高扩展性。

　　本文针对Linux下服务器集群问题研究，对HA高可用集群和LVS负载均衡集群进行了设计以及实现。通过Vmware Server来安装了多个linux虚拟机，作为多个节点，实现了高可用集群和负载均衡集群的设计。实验证明高可用集群和负载均衡集群可以提高服务器的稳定性和利用率。

关键词：集群技术； 高可用； 负载均衡； 扩展性； Linux

Abstract:Cluster technology is a common technique, which aims to resolve the shortage of stand-alone computing resource, lack of the capacity of IO, improve service reliability and the scalability of scale and reduce  the cost of the whole system’s running ,upgrade and maintenance . As long as the other technology can not meet this objective circumstances, or it is able to meet this need while it costs a lot, we can consider using clustering technology to achieve the need of high performance, high availability and high scalability. 

    In this paper, I do some research in linux server clusters and design and implement the  high availability cluster for HA and LVS for load balancing cluster. In VMware Server I Install multiple linux virtual machine, as multiple nodes to achieve high availability clustering and load balancing cluster design. Experiments show that high availability clustering and load balancing cluster can increase server stability and utilization. 

Keywords:  Cluster Technology;  HA;  Load balancing;  Expansibility;  linux