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Planning Downtime for Virtual Machines
Plan downtime for each virtual machine during the upgrade process. Typically, this downtime occurs during
the virtual machine upgrade and the VMware Tools upgrade. Depending on your upgrade plan, some virtual
machine downtime might be required during the ESX upgrade.
If an ESX/ESXi host is not managed by vCenter Server, you cannot use VMotion to move virtual machines. The
virtual machines must have some downtime when the ESX/ESXi host reboots after upgrade.
You might not have to shut down more than a single virtual machine at any given time. You can stagger virtual
machine downtimes to accommodate a schedule convenient to you and your customers.
For example:
n
If your virtual machine users are located in diverse time zones, you can prepare by migrating virtual
machines to specific hosts to serve a given time zone. This way you can arrange host upgrades so that
virtual machine downtime occurs transparently outside business hours for that time zone.
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If your virtual machine users operate around the clock, you can delay downtime for their virtual machines
to normally scheduled maintenance periods. You do not need to upgrade any stage within a certain time
period. You can take as long as needed at any stage.
Downtime for Upgrading Virtual Machines
When you upgrade virtual machines, the required downtime varies depending on the guest operating system.
The following procedures are involved in upgrading virtual machines:
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Upgrade VMware Tools
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Upgrade virtual hardware
During the VMware Tools upgrade, the virtual machine remains powered on. For Microsoft Windows
operating systems, you must reboot the guest operating system at the end of the VMware Tools upgrade
procedure. For Linux, Netware, and Solaris guest operating systems, no reboot is required at the end of the
procedure.
When you upgrade VMware Tools, expect downtime as follows:
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No downtime is required for vCenter Server.
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No downtime is required for ESX/ESXi hosts.
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You must reboot the virtual machine at the end of the upgrade procedure, or later, to make the upgrade
take effect.
n
On Windows guest operating systems, you must reboot the virtual machine a total of three times when
you upgrade VMware Tools and the virtual hardware:
a Power on the virtual machine.
b Upgrade VMware Tools.
c Reboot the virtual machine at the end of the VMware Tools upgrade.
d Power off the virtual machine.
e Upgrade the virtual Hardware.
f Power on the virtual machine.
g The Windows operating system detects new devices and prompts you to reboot the virtual machine.
h Reboot the virtual machine to make the devices work properly.
During the virtual hardware upgrade, the virtual machine must be shut down for all guest operating systems.
Chapter 13 Upgrading Virtual Machines
VMware, Inc. 85
- ESXi 4.0 1
- EN-000112-04 1
- 2 VMware, Inc 2
- Contents 3
- 4 VMware, Inc 4
- VMware, Inc. 5 5
- 6 VMware, Inc 6
- Updated Information 7
- 8 VMware, Inc 8
- About This Book 9
- VMware vSphere Documentation 10
- Host Upgrade 11
- Datastore Upgrade 12
- Virtual Machine Upgrade 12
- Licensing 13
- 14 VMware, Inc 14
- Example Upgrade Scenarios 2 15
- 16 VMware, Inc 16
- VMware, Inc. 17 17
- 18 VMware, Inc 18
- VMware, Inc. 19 19
- 20 VMware, Inc 20
- VMware, Inc. 21 21
- (with vCenter Server) 22
- (Without vCenter Server) 23
- 24 VMware, Inc 24
- Changing Host Types 3 25
- 26 VMware, Inc 26
- System Requirements 4 27
- Installation and Storage 28
- Chapter 4 System Requirements 29
- VMware, Inc. 29 29
- ESXi Hardware Requirements 30
- VMware, Inc. 31 31
- 32 VMware, Inc 32
- VMware, Inc. 33 33
- Required Ports 34
- DNS Requirements for vSphere 35
- 36 VMware, Inc 36
- Server 5 37
- 38 VMware, Inc 38
- Database Prerequisites 39
- 40 VMware, Inc 40
- Database Scenarios 41
- 42 VMware, Inc 42
- Back Up VirtualCenter 2.x 43
- 44 VMware, Inc 44
- Upgrade to vCenter Server 45
- 46 VMware, Inc 46
- %TEMP%\VCDatabaseUpgrade.log 47
- 48 VMware, Inc 48
- Existing Database 7 49
- 50 VMware, Inc 50
- VMware, Inc. 51 51
- 52 VMware, Inc 52
- VMware, Inc. 53 53
- 54 VMware, Inc 54
- VMware, Inc 55
- Upgrade to the vSphere Client 56
- License Server Scenarios 57
- Server Upgrade 58
- Restore VirtualCenter 2.x 59
- 60 VMware, Inc 60
- Permissions 9 61
- Datastore Privileges 62
- Network Privileges 62
- Update Datastore Permissions 63
- Update Network Permissions 64
- 4.0/ESXi 4.0 10 65
- 66 VMware, Inc 66
- VMware, Inc. 67 67
- 68 VMware, Inc 68
- VMware, Inc. 69 69
- Upgrading from ESX 2.5.5 70
- VMware, Inc. 71 71
- 72 VMware, Inc 72
- Upgrade ESX Hosts 73
- 74 VMware, Inc 74
- Upgrade ESXi Hosts 75
- 76 VMware, Inc 76
- Hosts 12 77
- Evaluation Period Countdown 78
- VMware, Inc. 79 79
- Upgrades 80
- Roll Back an ESX Upgrade 80
- VMware, Inc. 81 81
- 82 VMware, Inc 82
- Upgrading Virtual Machines 13 83
- About VMware Tools 84
- VMware, Inc. 85 85
- Windows Guest 86
- X Terminal 87
- 88 VMware, Inc 88
- VMware, Inc. 89 89
- 90 VMware, Inc 90
- VMware, Inc. 91 91
- 92 VMware, Inc 92
- VMware, Inc. 93 93
- 94 VMware, Inc 94
- Upgrade Virtual Hardware 95
- 96 VMware, Inc 96
- VMware, Inc. 97 97
- 98 VMware, Inc 98
- Best Practices for Updates 99
- Add a Host to the List 100
- Download Patches and Updates 100
- VMware, Inc. 101 101
- 102 VMware, Inc 102
- VMware, Inc. 103 103
- 104 VMware, Inc 104
- Procedure 105
- 106 VMware, Inc 106
- VMware, Inc. 107 107
- 108 VMware, Inc 108
- VMware, Inc. 109 109
- 110 VMware, Inc 110
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