HP BL680c XenServer Virtual Machine Installation 4.1.0 - Page 41

36

Appendix C. Troubleshooting VM

problems

If you experience odd behavior, application crashes, or have other issues, this chapter is meant

to help you solve the problem if possible and, failing that, describes where the application logs

are located and other information that can help your XenServer Solution Provider and Citrix track

and resolve the issue.

Troubleshooting of installation issues is covered in the

XenServer Installation Guide

. Trou-

bleshooting of XenServer Host issues is covered in the

XenServer Administrator's Guide

.

Note

We recommend that you follow the troubleshooting information in this chapter solely

under the guidance of your XenServer Solution Provider or Citrix Support.

Citrix provides two forms of support: you can receive free self-help support via the

Support site

, or

you may

purchase our Support Services

and directly submit requests by filing an online Support

Case. Our free web-based resources include product documentation, a Knowledge Base, and

discussion forums.

C.1. VM crashes

If you are experiencing VM crashes, it's possible that a kernel crash dump might help identify the

problem. If the crash is reproducible, follow this procedure to send the dumps to Citrix.

C.1.1. Linux VMs

For Linux VMs, the crashdump behavior can be controlled through the

actions-after-crash

parameter. The following are the possible values:

Value

Description

preserve

leave the VM in a paused state (for analysis)

coredump_and_restart

record a core dump, then reboot the VM

coredump_and_destroy

record a core dump, leave VM halted

restart

no core dump, just reboot VM (this is the default)

destroy

no coredump, leave VM halted

Procedure C.1. To enable saving of Linux VM crash dumps

1.

On the XenServer Host, determine the UUID of the desired VM using the command:

xe vm-list name-label=

<name>

params=uuid --minimal

2.

Change the

actions-after-crash

value using the

xe vm-param-set

; for example:

xe vm-param-set uuid=<vm_uuid> actions-after-crash=coredump_and_restart

C.1.2. Windows VMs

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 BL680c XenServer Virtual Machine Installation 4.1.0 - Page 41

Appendix C. Troubleshooting VM problems, C.1. VM crashes, C.1.1. Linux VMs, C.1.2. Windows VMs

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