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1、 2014 VMware Inc. All rights reserved. 双活数据中心与灾备解决方案-技术部分 臧铁军VMware GCH COE 云架构师 议程 1 同城双活技术方案 2 异地灾备技术方案 2 基于虚拟化技术的业务连续性解决方案概览 资资源池 vSpherevSpherevSphere 本地站点灾备站点 基于虚拟化层的异步复制 基于硬件设备的同异步复制 自动化应用切换管理 城域集群 应用感知的高可用性 关键应用零停机保护 在线迁移虚拟机，动态调配计算与存储资源 VMotion and Storage VMotion 高效的数据备份与恢复 可通过运行计划与脚本实现自动化操作
2、 资资源池 vSpherevSphere Dev / Test Dev / Test Dev / Test 灾难恢复 本地高可用 数据保护 方案特点 与应用程序和操 作系统无关 与硬件设备无关 完善的保护 简单，经济 3 议程 1同城双活技术方案 2 异地灾备技术方案 4 双活数据中心在各个级别上全面保障可用性 vMotion&DRS HA & FT 服务器 Storage vMotion， Storage DRS 存储 VMFS VMFS 硬件热添加 多网卡绑定 存储多路径 组件数据 Data Replication Metro Cluster 站点 5 双活数据中心总体架构 双活存储集群
3、站点A 站点B 延伸的vSphere集群 200 km 行为与单个vSphere相同 延伸距离最大200KM，通常小于50KM 通过VMware HA与vMotion实现自动的DR保护 需要双活存储集群，如EMC的vPlex，NetApp的MetroCluster等 6 计算资源设计 Making an Application Service Highly Available vSphere HA vSphere App HA 8 VMware vFabric tc Server vSphere App HA Policy-based Protect off-the-shelf apps 9
4、Fault Tolerance vs. High Availability Fault tolerance Ability to recover from component loss Example: Hard drive failure High availability Uptime percentage in one yearDowntime in one year 993.65 days 99.98.76 hours 99.9952 minutes 99.999 “five nines”5 minutes X 10 支持多vCPU的容错技术 Instantaneous Failove
5、r 4 vCPU4 vCPU vSphere PrimarySecondary Fast Checkpointing FT support for up to 4 vCPUs Protection for high performance, multi-vCPU VMs New, more scalable technology: fast check-pointing to keep primary and secondary in sync Overview Protect mission-critical, high-performance applications regardless
6、 of OS Continuous availability: zero downtime, zero data loss for infrastructure failures Fully automated response Benefits 11 Targeting cross-continental distances up to 100 ms RTTs Maintain standard vMotion guarantees Leader in VM flexibility 功能简介 Permanent migrations between data centers Disaster
7、 avoidance (DA) DR/DA testing Multi-site load balancing Follow the sun Benefits 长距离vMotion vSphere 6.0支持跨三层网络和跨vCenter Server的vMotions 12 vCenter Availability Run vCenter Server application in a VM Run vCenter Server database in a VM Run both in same VM? Protect with vSphere HA vCenter and DB VM res
8、tart priority set to High Enable guest OS and App monitoring App HA can protect SQL Server database Back up vCenter Server VM and database Image-level backup for vCenter Server VM App-level backup using agent for database backup 13 网络资源设计 双活数据中心网络架构 物理二层 (裸光纤) 逻辑二层 层叠网络 / VPN 二层分段 VM VM VM 二层分段 VM V
9、M VM 二层网络 扩展的二层网络 (二层内容在 数据中心互连 链路上传递) 站点A站点B 二层网络 15 NSX vSphere Multi-Site Use Cases NSX for vSphere supports 3 different Multi-Site Deployment Models 1.VXLAN with Stretched Clusters (vSphere Metro Storage Cluster) 2.VXLAN with Separate Clusters 3.L2 VPN All solutions provide L2 extension over an
10、L3 network, enabling workload & IP mobility without the need to stretch VLANs Local egress is supported, however it does add complexity The appropriate deployment model will depend on customer requirements and their environment NSX利用层叠网络实现双活数据中心 双活存储 vSphere城域存储集群 数据存储储1 数据存储储2 vCenter Server 三层 网络
11、站点A站点B VM1 VM 2 VM3 逻辑逻辑交换换机A 172.16.10.0/24 VM 4 VM5 逻辑逻辑交换换机B 172.16.20.0/24 分布式逻辑路由器 站点A 边界网关 上联网络A 站点B 边界网关 上联网络B 17 VMware NSX Multi-Site Single VC, Stretched Cluster Solution Detail Requires a supported vSphere Metro Storage Cluster configuration In a vMSC deployment, storage is Active/Active
12、and spans both sites. Examples of Active/Active storage are: EMC VPLEX, NetApp Metro Cluster (see VMware HCL for more information) Stretched clusters support Live vMotion of workloads Use L3 for all VMkernel networks: Management, vMotion, IP Storage All management components such as vCenter Server,
13、NSX Manager and Controllers are located in Site A Latency and bandwidth requirements are dictated by vMSC storage vendor, eg 10ms RTT for VPLEX which also aligns with vMotion using Enterprise Plus vMSC enables disaster avoidance and basic Disaster Recovery (without the orchestration or testing capab
14、ilities of SRM) Loss of either NSX Components or the Datacenter Interconnect will results in a fallback to data plane based learning using existing network state. Therefore there is no outage to data forwarding and without vCenter Server, there are no VM provisioning or migration operations NSX and
15、vMSC are complimentary technologies that fit a sweet spot for NSX (Single vCenter Server) VMware NSX Multi-Site Single VC, Stretched Cluster VMware ESXiVMware ESXiVMware ESXiVMware ESXi Site ASite B Stretched Workload Cluster VMware ESXiVMware ESXiVMware ESXiVMware ESXi Site ASite B Stretched Edge C
16、luster Cluster Configuration vMSC enables stretched clusters across two physical sites In an NSX deployment Management, Edge and Workload clusters are all stretched Under normal conditions all Management Components run in a Site A and are protected by vSphere HA They are automatically restarted at Site B in the event of a site outage. The management ne
