云计算与虚拟化技术 第8讲: High Availability 阮晓龙 13938213680/n@hactcm edu cn http://cloud.xg.hactcm.edu.cn http://www.51xueweb.cn 河南中医药大学信息管理与信息系统教研室 信息技术学院网络与信思系统科研工作室 20194
2 讨论提纲 a Introducing High Availability Understanding the Layers of High Availability ■ Clustering vMs a Implementing vSphere High Availability Understanding vSphere High Availability Clusters Understanding VSphere High Availability's Core Components Enabling vSphere HA Configuring vSphere High Availability Managing vSphere High Availability a Planning for Business Continuity 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
3 1. Introducing 1.uNderstanding the Layers of High Availability o Even in non-virtualized environments, there are multiple ways to achieve high availability for Operating System(OS)instances and applications. When you introduce virtualization into the mix with VSphere, you gain additional methods of providing high availability At each layer are tools and techniques for providing high availability and business continuity o At the Application layer, options include Oracle Real Application Clusters RAC), or simply application resiliency through a micro-services architecture o At the OS layer, solutions include OS clustering functionality, such as Windows Server Failover Clustering(WSFC) 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
4 1. Introducing 1.uNderstanding the Layers of High Availability o Even in non-virtualized environments, there are multiple ways to achieve high availability for Operating System(OS)instances and applications. When you introduce virtualization into the mix with VSphere, you gain additional methods of providing high availability At each layer are tools and techniques for providing high availability and business continuity o The virtualization layer offers a number of features for high availability, including vSphere High Availability(HA), vSphere Fault Tolerance(FT), and stretched(metro) storage clusters At the Physical layer, high availability is achieved through redundant hardware--multiple network interface cards(NICs) or host bus adapters (HBAs), multiple storage area network(SAN) switches and fabrics, multiple paths to storage, multiple controllers in storage arrays, redundant power supplies, and so forth 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn
5 1. Introducing 1.uNderstanding the Layers of High Availability FIGURE 7.1 Each layer has its own App App App App Application layer forms of high availability H|&: perating Virtualization software Virtualization layer 一一一一一一一一一一一一一一一一一一一一 Physical infrastructure(switches, NICs servers,SANs, disks, etc. Physical layer 河南中医药大学/阮晓龙/13938213680/htp/cloudxg.hactcm.edu.cn/http:/www5ucwebcn