HP DL385 XenServer Virtual Machine Installation 4.1.0 - Page 36

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Chapter 5. Updating VMs

This chapter discusses updating VMs with new Linux kernel revisions, updating Windows operating systems,

applying Windows Service Packs, and updates to XenServer paravirtualized drivers and VM utilities.

Upgrades to VMs are typically required when moving to a new version of XenServer. The following are

current issues involving upgrading VMs running on XenServer to this version:

•

XenMotion of Windows VMs is not supported until the paravirtualized drivers are upgraded.

•

Suspend/Resume of Windows VMs is not supported until the paravirtualized drivers are upgraded.

•

The use of certain anti-virus and firewall applications may crash the Windows VM unless the paravirtu-

alized drivers are upgraded.

5.1. Updating Windows operating systems

Windows installation disks typically provide an upgrade option if you boot them on a server which has an

earlier version of Windows already installed. So if, for example, you have a Windows 2000 server, and you

wish to update it to Windows 2003, you can insert the Windows 2003 installation CD in the CD drive and

run the setup program to update it.

Similarly, you can update the operating system of Windows VMs. Before doing so, you need to uninstall the

paravirtualized device drivers. If they are present during the attempt to update, the update will fail.

Procedure 5.1. To uninstall the paravirtualized drivers

1.

Select Control Panel from the Start menu.

2.

In Windows XP, 2000, or 2003, select Add or Remove Programs.

In Windows Vista, select Programs, then select Programs and Features.

3.

A list of programs installed on the computer is displayed. Scroll down if necessary and select Citrix

XenServer Windows PV drivers Add-on.

4.

In Windows XP, 2000, or 2003, click the Remove button.

In Windows Vista, select Uninstall from the toolbar above the list of programs.

This will remove the PV drivers add-on. At the end, a message is displayed. Click OK to close the

message box.

Once the operating system update is complete, reinstall the PV drivers just as you would after installing a

fresh Windows VM. See Section 3.2, “Windows paravirtualized drivers” for details.

5.2. Updating paravirtualized drivers for Windows VMs

The paravirtualized drivers are present on the built-in

xs-tools.iso

available to XenCenter via the Install

XenServer Tools command from the VM menu, which attaches the CD image containing the drivers to the

VM. You can either wait for the auto-run facility, or manually click on the

xensetup.exe

program. Follow the

on-screen prompts to install the new drivers, which will automatically deactivate and upgrade the old drivers.

Section	Page
XenServer Virtual Machine Installation Guide	1
Table of Contents	4
Chapter 1. About this document	6
1.1. Overview	6
1.2. How this Guide relates to other documentation	6
Chapter 2. Creating VMs	7
2.1. Overview	7
2.2. Virtual memory and disk size limits	7
2.3. XenServer product family virtual device support	8
2.4. Physical to Virtual Conversion (P2V)	9
2.4.1. General Guidelines for Virtualizing Physical Servers	10
2.5. Cloning an existing VM	11
2.6. Importing an exported VM	11
2.6.1. Exporting a VM	12
2.6.2. Importing a VM	12
Chapter 3. Installing Windows VMs	14
3.1. Making the ISO available to XenServer Hosts	14
3.1.1. Copying ISOs to local storage	15
3.2. Windows paravirtualized drivers	16
3.3. Remote Desktop	16
3.4. Preparing to clone a Windows VM	17
3.5. Release Notes	18
3.5.1. General Windows Issues	18
3.5.2. Windows 2003 Server	18
3.5.3. Windows XP SP2	18
3.5.4. Windows 2000 Server	18
3.5.5. Windows Vista	18
Chapter 4. Installing Linux VMs	19
4.1. Installation of a built-in distribution	20
4.2. Installing Linux from vendor media to a VM	20
4.3. Installing Linux from a network installation server to a VM	22
4.4. Physical-to-Virtual Installation of a Linux VM	23
4.4.1. Guest Installation Network	23
4.5. Installing the Linux guest agent	24
4.6. Preparing to clone a Linux VM	25
4.6.1. Machine Name	25
4.6.2. IP address	25
4.6.3. MAC address	26
4.7. Time handling in Linux VMs	26
4.8. Configuring VNC for VMs	26
4.8.1. Setting up Red Hat-based VMs for VNC	26
4.8.1.1. Determining the location of your VNC configuration file	27
4.8.1.2. Configuring GDM to use VNC	27
4.8.1.3. Firewall settings	28
4.8.1.4. VNC screen resolution	28
4.8.2. Setting up SLES-based VMs for VNC	29
4.8.2.1. Checking for a VNCserver	29
4.8.2.2. Enabling Remote Administration	29
4.8.2.3. Modifying the xinetd configuration	30
4.8.2.4. Firewall settings	30
4.8.2.5. VNC screen resolution	31
4.8.3. Setting up Debian-based VMs for VNC	32
4.8.4. Checking runlevels	32
4.9. Release Notes	32
4.9.1. Debian Sarge 3.1 and Etch 4.0	32
4.9.2. Red Hat Enterprise Linux 3	33
4.9.3. Red Hat Enterprise Linux 4	33
4.9.3.1. Preparing a RHEL 4.x guest for P2V	34
4.9.4. Red Hat Enterprise Linux 5	34
4.9.5. CentOS 4	35
4.9.6. CentOS 5	35
4.9.7. SUSE Enterprise Linux 9	35
4.9.8. SUSE Enterprise Linux 10 SP1	35
4.9.9. Oracle Enterprise Linux 5	35
Chapter 5. Updating VMs	36
5.1. Updating Windows operating systems	36
5.2. Updating paravirtualized drivers for Windows VMs	36
5.3. Updating Linux kernels and guest utilities	37
Appendix A. Creating ISO images	38
Appendix B. Setting Up a Red Hat Installation Server	39
B.1. Copy installation media	39
B.2. Enable remote access	39
B.2.1. NFS	39
B.2.2. FTP	40
B.2.3. HTTP	40
Appendix C. Troubleshooting VM problems	41
C.1. VM crashes	41
C.1.1. Linux VMs	41
C.1.2. Windows VMs	41
C.2. Troubleshooting boot problems on Linux VMs	42

HP DL385 XenServer Virtual Machine Installation 4.1.0 - Page 36

Updating VMs, 5.1. Updating Windows operating systems, 5.2. Updating paravirtualized

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