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Section 14 Improving Availability
This section describes how to improve the VMware high availability.
The VMware High Availability (HA) functionality is designed to recover ESX(i)
servers automatically from a hardware failure. Virtual machines that are running on
the failed server are automatically restarted on another ESX(i) server. There will be
some minutes from the detection that the virtual machines are offline to the restarted
virtual machines restoring services. The configuration of VMware HA allows the
specification of the ESX server that hosts the restarted virtual machines.
VMware HA requires that the virtual machines are stored on an external storage
server such as a SAN server, and that the ESX(i) Servers are added to a vCenter
Server. The storage network and the management network must be redundant.
With the introduction of USB support in ESX(i) 4.1 it is possible to have the ABB
USB dongle connected directly into the ESX(i) server and available in the guest.
However, when a virtual machine is moved from one ESX(i) server to another it is
necessary to move the dongle as well. Here, it would be beneficial to use a USB
over IP device such as AnywhereUSB to maintain continuity of functionality when
moving virtual machines.
Configuring VMware High Availability
Before configuring VMware HA, the network setup should be reviewed. Refer to
section ESX(i) Server Configuration.
When a virtual machine is moved from one ESX(i) server to another, the vSwitches
must have the same set of names. For example, if the plant network is named PN1
on ESX1, then it must also be named PN1 on ESX2 and ESX3.
VMware High Availability is not a substitute for 800xA redundancy.
- System 800xA 1
- TRADEMARKS 4
- Table of Contents 5
- Section 6 - Security 6
- Section 7 - Optimizations 6
- Upgrades 7
- Section 16 - Virtual Client 9
- Revision History 10
- About This User Manual 11
- User Manual Conventions 12
- Terminology 12
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- Section 1 Introduction 15
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- Non-virtualized 800xA System 17
- Consolidated 800xA System 18
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- Section 3 Planning 21
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- Determine Additional Hardware 25
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- MasterBus 27
- VMware vSphere ESX Versions 28
- VMware ESX Server 29
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- Figure 7. ESXi Installer 32
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- Setting ESX(i) time 43
- Create Virtual Switches 44
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- Install 800xA into the VMs 47
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- Section 5 Backup and Restore 51
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- Section 6 Security 53
- Users Section 6 Security 54
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- Permissions 55
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- Section 7 Optimizations 57
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- Dell and HP Servers 60
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- IBM Servers 62
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- Pre-requisites 64
- Procedure Summary 64
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- Configuration 67
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- Installation Sequence 71
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- Adding ABB Object Types 78
- Creating Objects 78
- Configure the Object 79
- Configure the ESX Server 80
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- Table 1. Trap Configuration 86
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- Figure 29. Event Traps 88
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- Updates and Upgrades 91
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- Installing Drivers 93
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- Download Upgrade Files 97
- Prepare ESX Server 98
- Apply Upgrades 98
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- USB Memory Sticks 100
- Support Components 101
- Application Servers 102
- Connectivity Servers 102
- Parts List 103
- Redundant 8 Node 800xA System 105
- Additional External Parts 107
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- SAN Hardware 110
- SAN Storage Configuration 111
- SAN Networking 112
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- Adding in Datastores 117
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- Load Balancing 118
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- Selection 119
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- User Accounts 125
- Installation Procedure 126
- Installing vSphere Client 127
- Configuring vCenter Server 128
- Adding a Datacenter Object 128
- Adding an ESX(i) Server 128
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- Adding a Cluster Object 132
- Specifying Failover Host 133
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- VMware vMotion 135
- VMware Storage vMotion 135
- VMware Fault Tolerance 135
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- Section 16 Virtual Client 139
- Windows: 140
- Virtual Terminal Server 141
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- Control Room Planning 143
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- Virtual Client 145
- Terminal Server Definition 147
- Thin Clients 149
- Multiple Screen 150
- Limitations 151
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- VMware ESX(i) 157
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- Updates in Revision Index A 162
- Updates in Revision Index B 162
- Updates in Revision Index C 163
- Updates in Revision Index D 164
- Updates in Revision Index E 164
- Updates in Revision Index F 165
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- Contact us 168
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