1. © 2011 VMware Inc. All rights reserved High Availability Module 7

2. 7-2 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A You Are Here VMware vSphere: What’s New Course IntroductionIntroducing vSphere 5.0Virtual Machine ManagementNetwork ManagementStorage ManagementScalabilityHigh AvailabilityNew Alternatives for Deploying vSphere

3. 7-3 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Importance Most datacenters depend on a variety of products and features offering high availability. VMware vSphere® 5.0 offers new and enhanced features in this area.

4. 7-4 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Learner Objectives After this module, you should be able to do the following:  Discuss VMware® Fault Tolerance (FT) enhancements.  Discuss Enhanced vMotion Compatibility (EVC) enhancements.  Discuss enhancements made to VMware vSphere® High Availability.

5. 7-5 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere 5.0 Enhancements to FT

6. 7-6 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere 5.0 Enhancements to EVC Enhancements to EVC include:  Support for new Intel and AMD processor groups  Ability to support future processors  Ability to change EVC mode when host is disconnected  Validation checks run at reboot to check for BIOS changes.

7. 7-7 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere 5.0 Enhancements to vSphere HA New vSphere HA infrastructure:  Improved functionality and greater scalability  Uses both network and storage as communication channels  Deploys and reconfigures within seconds, regardless of cluster size  Removes dependencies on commonly misconfigured services, for example, DNS  Master/slave concept, which replaces primary/secondary roles New and improved vSphere HA features:  Management network partition support (new)  Single log file for operational, day-to-day logging (improved)  Syslog integration (new)  Host isolation response (improved)  Admission control (improved)  Error and status reporting (improved)

8. 7-8 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Responsibilities of the Master and Slave Agents Master agent:  Ensures the protection of virtual machines that are protected by vSphere HA  Maintains the current state of protected virtual machines and slaves: Restarts virtual machines on slave hosts when a slave fails  Manages the list of hosts that are members of the cluster and manages the list of protected virtual machines  Informs the slaves of changes in the cluster configuration  Sends heartbeats to slaves so that slaves know that the master is alive Slave agent:  Monitors on its own host the virtual machines protected by vSphere HA: Slaves can reset virtual machines on their own host. Slaves inform the master of power state changes.  Monitors the health of the master, and if the master should fail, the slaves participate in a new master election

9. 7-9 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA Architecture: Master and Slave Agents

10. 7-10 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA Architecture: Virtual Machine Protection VM A (protected) TMPL 1 VM B VM D (protected) VM C VM E (protected) slave host master host management network vCenter Server shared datastores list of protected virtual machines powered on by a user powered off by a user vSphere HA cluster

11. 7-11 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA Architecture: Network Heartbeats slave host master host management networks vCenter Server shared datastores TMPL 1 VM A VM E VM C VM D VM B vSphere HA cluster

12. 7-12 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA Architecture: Datastore Heartbeats slave host master host management networks vCenter Server heartbeat datastores TMPL 1 VM A VM E VM C VM D VM B NAS/NFSVMFS vSphere HA cluster

13. 7-13 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Scenario 1: Failed Slave Host vCenter Server VM A (protected) TMPL 1 VM B (protected) VM D (protected) VM C (protected) VM E (protected) slave host master host ?? heartbeat datastores NAS/NFSVMFS management networks

14. 7-14 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Scenario 2: Failed Master Host vCenter Server heartbeat datastores NAS/NFSVMFS management networks A new master host is elected. The new master host restarts VM C and VM E on other hosts in the cluster. VM A (protected) TMPL 1 VM B (protected) VM D (protected) VM C (protected) VM E (protected) master host (moid = 100) slave host (moid = 99) slave host (moid = 98) ?

15. 7-15 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Scenario 3: Isolated Host VM A (protected) TMPL 1 VM B (protected) VM D (protected) VM C (protected) VM E (protected) default gateway (isolation address) heartbeat datastores NAS/NFSVMFS management networks master host slave host

16. 7-16 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Scenario 4: Network Partition default gateway (isolation address) VM A TMPL 1 master host 1 VM C VM D slave host 1 VM E VM F slave host 2 VM G VM H slave master 2 vCenter Server Only one master host communicates with vCenter Server. partition Apartition B

17. 7-17 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA Cluster Information

18. 7-18 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Changes to vSphere HA Admission Control Policies Percentage of cluster resources per CPU and per memory Multiple failover hosts allowed

19. 7-19 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A vSphere HA System Files

20. 7-20 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Lab 6 In this lab, you will monitor vSphere HA cluster activity. 1. Prepare to use the team vCenter Server system. 2. Create a vSphere HA cluster. 3. View information about your vSphere HA cluster. 4. Monitor activity in your vSphere HA cluster. 5. Prepare for the next lab.

21. 7-21 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Review of Learner Objectives You should be able to do the following:  Discuss FT enhancements.  Discuss EVC enhancements.  Discuss enhancements made to vSphere HA.

22. 7-22 © 2011 VMware Inc. All rights reserved VMware vSphere: What’s New – Revision A Key Points  vSphere 5.0 implements a new vSphere HA architecture that is based on master and slave agents.  vSphere HA uses a heartbeat datastore as the backup communication channel if a network isolation condition occurs.  A vSphere HA cluster can have more than one master host if a network partition condition occurs. Questions?