基于OpenStack和Cloudify的自伸缩云平台体系

Self-elasticity cloud platform based on OpenStack and Cloudify

现有Web服务在面临高并发请求时,会出现响应时间增加,甚至服务器宕机的问题,为此提出一种基于云计算的自伸缩分布式Web系统架构。该架构构建在OpenStack基础设施即服务(IaaS)的平台之上,结合Cloudify平台即服务(PaaS)的平台,实现了自伸缩云应用平台(ECAP);并提出以虚拟机资源模板为标度值来构建模糊矩阵,实现模糊层次分析调度算法。最后在云平台上上传测试应用,并使用压力测试工具对平台进行了测试分析,结果表明所构建平台比普通应用服务器在应用的平均响应时间和负荷性能上表现更好。

Under the condition of being confronted with highly concurrent requests, the existing Web services would bring about the increase of the response time, even the problem that server goes down. To solve this problem, a kind of distributed self-elasticity architecture for the Web system named ECAP （ self-Elasticity Cloud Application Platform） was proposed based on cloud computing. The architecture built on the Infrastructure as a Service （IaaS） platform of OpenStack. It combined Platform as a Service （PaaS） platform of Cloudify to realize the ECAP. In addition, it realized the fuzzy analytic hierarchy scheduling method by building the fuzzy matrix in the scale values of virtual machine resource template. At last, the test applications were uploaded in the cloud platform, and the test analysis was given by using the tool of pressure test. The experimental result shows that ECAP performs better in the average response time and the load performance than that of the common application server.