Red Hat ENTERPRISE LINUX 5 - VIRTUALIZATION GUIDE Instalační příručka stáhnout pdf (Strana 343)

The example below is a typical a para-virtualized guest configuration file:

name = "rhel5vm01"

memory = "2048"

disk = ['tap:aio:/var/lib/libvirt/images/rhel5vm01.dsk,xvda,w',]

vif = ["type=ieomu, mac=00:16:3e:09:f0:12 bridge=xenbr0',

"type=ieomu, mac=00:16:3e:09:f0:13 ]

vnc = 1

vncunused = 1

uuid = "302bd9ce-4f60-fc67-9e40-7a77d9b4e1ed"

bootloader = "/usr/bin/pygrub"

vcpus=2

on_reboot = "restart"

on_crash = "restart"

Note that the serial="pty" is the default for the configuration file. This configuration file example

is for a fully-virtualized guest:

name = "rhel5u5-86_64"

builder = "hvm"

memory = 500

disk = ['/var/lib/libvirt/images/rhel5u5-x86_64.dsk.hda,w']

vif = [ 'type=ioemu, mac=00:16:3e:09:f0:12, bridge=xenbr0', 'type=ieomu,

mac=00:16:3e:09:f0:13, bridge=xenbr1']

uuid = "b10372f9-91d7-ao5f-12ff-372100c99af5'

device_model = "/usr/lib64/xen/bin/qemu-dm"

kernel = "/usr/lib/xen/boot/hvmloader/"

vnc = 1

vncunused = 1

apic = 1

acpi = 1

pae = 1

vcpus =1

serial ="pty" # enable serial console

on_boot = 'restart'

Note

Editing Xen configuration files is unsupported. Use virsh dumpxml and virsh create (or

virsh edit) to edit the libvirt configuration files (xml based) which have error checking

and safety checks.

35.13. Int erpret ing Xen error messages

You receive the following error:

failed domain creation due to memory shortage, unable to balloon domain0

A domain can fail if there is not enough RAM available. Domain0 does not balloon down enough to

provide space for the newly created guest. You can check the xend.log file for this error:

[2006-12-21] 20:33:31 xend 3198] DEBUG (balloon:133) Balloon: 558432 Kib free; 0 to

scrub; need 1048576; retries: 20

[2006-12-21] 20:33:31 xend. XendDomainInfo 3198] ERROR (XendDomainInfo: 202

Domain construction failed

⁠Chapt er 35. T roub leshoo t ing Xen

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