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INDIA │ 9-11 February 2011. virtual techdays. High Availability Clustering using Windows Server 2008 R2. Ninad Doshi │Associate Consultant-Global Delivery, Microsoft . Agenda. Hyper-V Introduction Hyper-V Requirements Windows 2008 R2 Clustering Cluster Shared Volumes

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  1. INDIA │ 9-11 February 2011 virtual techdays High Availability Clustering using Windows Server 2008 R2 Ninad Doshi │Associate Consultant-Global Delivery, Microsoft

  2. Agenda • Hyper-V Introduction • Hyper-V Requirements • Windows 2008 R2 Clustering • Cluster Shared Volumes • Live Migration • Multi-Site Clustering

  3. Hyper-V Requirements Description • Hypervisor based virtualization platform • Windows Server 2008 R1 or R2 x64 Edition technology • Standard, Enterprise and Datacenter Editions Full or Server Core • Hyper-V Server Hardware Requirements • x64 server with hardware assisted virtualization • AMD-V or Intel VT • Hardware enabled Data Execution Prevention (DEP) required • AMD (NX no execute bit) or Intel (XD execute disable)

  4. Installing the Hyper-V or Failover Cluster Role • Open “Windows PowerShell Modules” on the Full Version of Windows 2008 R2 from Administrative Tools • Add-WindowsFeature Hyper-V or Failover-Clustering • On the Server Core Enable PowerShell and Allow Server Manager Remote Management using sconfig • Open PowerShell and enter Import-Module ServerManager • Add-WindowsFeatureHyper-V or Failover-Clustering Installation of Hyper-V or Failover Clustering using PowerShell in Full and Server CORE version of Windows 2008 R2

  5. Hot Add/Remove Storage • Overview • Add and remove VHD and pass-through disks to a running VM without requiring a reboot. • Hot-add/remove disk applies to VHDs and pass-through disks attached to the virtual SCSI controller • Benefits • Enables storage growth in VMs without downtime • Enables additional datacenter backup scenarios

  6. Processor Compatibility Mode • Overview • Allows live migration across different CPU versions within the same processor family (i.e. Intel-to-Intel and AMD-to-AMD). • Does NOT enable cross platform from Intel to AMD or vice versa. • Configure compatibility on a per-VM basis. • Abstracts the VM down to the lowest common denominator in terms of instruction sets available to the VM. • Benefits • Provides a great deal of migration flexibility within clusters. • Enables migration across a broader range of Hyper-V host hardware. • No specific hardware requirements needed.

  7. Processor Compatibility Mode • If a host A’s processor features are superset of host B’s processor features, migrating a running VM from host A to host B will fail; if the same VM is put in processor compatibility mode migration will succeed (see below image) • Hypervisor exposes only those features to VM that are available between all Hyper-V supported processors VM NOT in Processor compatibility mode VM in Processor compatibility mode VM sees processor features: X,Y,Z VM sees processor features: X,Y Migration fails Migration succeeds Physical Processor features: X,Y,Z Physical Processor features: X,Y Physical Processor features: X,Y Physical Processor features: X,Y,Z Host B Host A Host B Host A How it works?

  8. What is the Validate tool? • Test tool built right into the product • Runs a focused set of tests on a collection of servers that are intended to be a cluster • Catch hardware or configuration problems before the cluster goes in production • Ensures that the solution you are about to deploy is rock solid • Run validate each and every time you install a new cluster • It’s the very first thing you do! • Validate can also be run on configured clusters as a diagnostic tool • Disk Resources need to be in an Offline state to be validated Will replace the Cluster HCL in Win2008!

  9. Requirements • Software • Hardware • Network and Domain Account • All multi-path software must be based on Microsoft Multipath I/O (MPIO) • If using a custom Device Specific Module (DSM), it must have a logo All components in a cluster must have a Certified for Windows logo

  10. Windows 2008 Cluster Storage Requirements Supported Shared Bus Types: SAS Fibre Channel iSCSI Only storage that supports Persistent Reservations will be supported in 2008 Failover Clustering Deprecating parallel-SCSI support • Serial Attached SCSI (SAS) based clusters will replace parallel-SCSI

  11. Demo • Creating a HyperV cluster

  12. Cluster Shared Volumes • Distributed file access solution for Hyper-V • Concurrent access to disk from any node • VMs do not know their host • VMs no longer bound to storage • VMs remain online during live migration Better Storage Utilization with CSV

  13. Single Name Space • Files have the same name and path when viewed from any node in the cluster • CSV volumes are exposed as directories and subdirectories under the “ClusterStorage” root directory • C:\ClusterStorage\Volume1\<root> • C:\ClusterStorage\Volume2\<root> • C:\ClusterStorage\Volume3\<root> CSV provides a single consistent file name space

  14. CSV Compatibility • No special hardware requirements • Same requirements as standard cluster disk • iSCSI, Fibre Channel, SAS • No directory structure or depth limitations • No proprietary file system • Standard NTFS • Support Hyper-V Workload It Just Works!

  15. Cluster Shared Volumes Overview Data over any network Coordinator Node Distributed File Access for Hyper-V 1 LUN, Many VMs SAN Better Storage Utilization with CSV VHD VHD VHD

  16. CSV Benefits • Simplify Storage Management • Consolidate VMs on a CSV disk • Individual VMs can failover on a shared LUN • Remove drive letter dependency • Live migration • Increases Reliability • Dynamic I/O Redirection • Node Fault Tolerance • Network Fault Tolerance • Storage Access Redirection 99.9% 99.99% Availability 99% 99.999%

  17. Live Migration • Live Migration via Cluster Manager • In box UI • Live Migration via Virtual Machine Manager • Orchestrate migrations via policy • Moving from Quick to Live Migration: • Guest OS limitations?: No • Changes to VMs needed?: No • Changes to Storage infrastructure: No • Changes to Network Infrastructure: No • Update to WS 2008 R2 Hyper-V: Yes

  18. Hyper-V Live Migration • Move a running VM between hosts with no user-perceived downtime • Client is not aware of the migration • Maintain open TCP connections to the guest OS • Clients stay connected • Planned failover Failover Clustering still recovers VM from an unplanned failover

  19. Demo • Live Migration

  20. Live Migration Virtual Machine Live Migration Memory content is copied to new server • Entire VM memory copied Live Migrate SAN • May be additional incremental data copies until data on both nodes is essentially identical VHD

  21. Live Migration Virtual Machine Live Migration • Session state is maintained • No reconnections necessary • Clients stay connected to “live” VM Client directed to new host SAN • ARP issued to point routing devices to new node • Old VM deleted after success VHD

  22. Migration – Our Upgrade Path • Built-in Migration Wizard • Windows Server 2008 is a new architecture rolling upgrades are not available • Migration tool does not migrate data, it only migrates resources • Reuse storage or copy data and use new storage • Migrate resource groups between clusters • Enhanced Pre- and Post- migration reports • Guide: http://go.microsoft.com/fwlink/?LinkID=142796 2003 2008 R2 2008 2008 R2 2008 R2 2008 R2

  23. Multi-Site Clustering • Introduction

  24. Benefits of a Multi-Site Cluster • Protects against loss of an entire datacenter • Automates failover • Reduced downtime • Lower complexity of disaster recovery plan • Reduces administrative overhead • Automatically synchronize application and cluster changes • Easier to keep consistent than standalone servers • The primary reason DR solutions fail is • dependence on people

  25. Evaluate Business Need • Multi-Site cluster isn’t for every company/application • Increased cost • Potentially increased complexity (compared to local clusters) • Evaluate business requirements • Application importance • Type of application (database, e-mail, line of business) • Availability options (tape backup, log shipping, clusters) • Plan: architecture, site location, failover, failback, testing • Test, test, and test again (and test routinely)

  26. Multi-Site Clustering Diagram

  27. Multi-Site Clustering Guide • Design guide: • http://technet.microsoft.com/en-us/library/dd197430.aspx • Deployment guide/checklist: • http://technet.microsoft.com/en-us/library/dd197546.aspx

  28. Innovation • Manageability • Supportability Session Summary • Cluster Shared Volumes • Live Migration • PowerShell • Migration • Improved Integration • Datacenter Tools • Improved Logging • Enhanced Validation • Performance Counters • Eventing • Windows Server 2008 R2 is delivering substantial value • Hyper-V deployments will want to upgrade immediately • No special requirements – it just works • Lower costs • Higher Availability

  29. Online Resources • Single Source for Failover Clustering http://blogs.msdn.com/clustering/archive/2009/08/21/9878286.aspx • Windows Server Virtualization Blog Site: http://blogs.technet.com/virtualization/default.aspx • Windows Server Virtualization TechNet Site: http://technet2.microsoft.com/windowsserver2008/en/servermanager/virtualization.mspx • Infrastructure Planning and Design guides for Virtualization http://technet.microsoft.com/en-us/solutionaccelerators/ee395429.aspx • Virtualization Case Studies http://www.microsoft.com/virtualization/case-studies.mspx • Windows Server 2008 Virtualization & Consolidation: http://www.microsoft.com/windowsserver2008/en/us/virtualization-consolidation.aspx • Optimized Desktop Infrastructure: http://www.microsoft.com/windows/products/windowsvista/enterprise/default.mspx

  30. THANKS│9-11 February 2011 virtual techdays ninad@microsoft.com

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