Installation guide

This file guest.xml can recreate the guest (see Editing a guest's configuration file. You can edit this

XML configuration file to configure additional devices or to deploy additional guests. See

Section 34.1, “ Using XML configuration files with virsh” for more information on modifying files

created with virsh dumpxml.

An example of virsh dumpxml output:

# virsh dumpxml r5b2-mySQL01

<name>r5b2-mySQL01</name>

<bootloader>/usr/bin/pygrub</bootloader>

<os>

<type>linux</type>

<kernel>/var/lib/libvirt/vmlinuz.2dgnU_</kernel>

<initrd>/var/lib/libvirt/initrd.UQafMw</initrd>

<cmdline>ro root=/dev/VolGroup00/LogVol00 rhgb quiet</cmdline>

</os>

<on_poweroff>destroy</on_poweroff>

<on_reboot>restart</on_reboot>

<on_crash>restart</on_crash>

</interface>

</devices>

</domain>

Creat in g a gu est f ro m a co n f ig u rat io n f ile

Guests can be created from XML configuration files. You can copy existing XML from previously

created guests or use the dumpxml option (see Creating a virtual machine XML dump (configuration

file)). To create a guest with virsh from an XML file:

# virsh create configuration_file.xml

Ed it ing a gu est ' s co nf ig u rat io n f ile

Instead of using the dumpxml option (see Creating a virtual machine XML dump (configuration file)),

guests can be edited either while they run or while they are offline. The virsh edit command

provides this functionality. For example, to edit the guest named softwaretesting:

# virsh edit softwaretesting

This opens a text editor. The default text editor is the $EDITOR shell parameter (set to vi by default).

Su spen d in g a gu est

Suspend a guest with virsh:

# virsh suspend {domain-id, domain-name or domain-uuid}

When a guest is in a suspended state, it consumes system RAM but not processor resources. Disk

Red Hat En t erp rise Lin ux 5 Virt ualizat ion Guid e

260