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KVM guests unique ID

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Special Forums UNIX and Linux Applications Virtualization and Cloud Computing KVM guests unique ID
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Old 07-28-2014
KVM guests unique ID
Hi,
I wanted to know if there was a way to get a unique UUID for KVM guest from the guest OS which isn't easily modifiable. I have a software that I would like to run inside a KVM guest and want to do some license protection on it using a unique UUID. Does KVM allow multiple VMs on the same machine with same UUID. I mean if someone edits the configuration file of the VM manually from the host, would it still bring up the VM if the uuid was duplicated ? Also how can I get the uuid of a guest VM from the guest ?

Also if someone could throw some light on guest host communication channel. Is there an equivalent of Xenstore or guest property store in KVM ? Some mechanism to share small messages between the guest and the host.

Thanks
Shivani
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LEARN ABOUT DEBIAN

xen-resize-guest

XEN-RESIZE-GUEST(8)					 Perl Programmers Reference Guide				       XEN-RESIZE-GUEST(8)

NAME

       xen-resize-guest - Resize a loopback or LVM based xen guest.

SYNOPSIS

	 xen-resize-guest [options]

	 Help Options:
	  --help     Show help information.
	  --manual   Read the manual for this script.
	  --version  Show the version information and exit.
	  --verbose  Show diagnostic output.

	 General Options:
	  --add      Specify the amount of space to add, e.g. --add=1gb
	  --dir      Specify the path to the loopback image root.
	  --force    Force the resize to happen without a last-chance delay.
	  --hostname Specify the hostname of the guest to resize.

OPTIONS

       --add Specify the amount of storage to add to the primary disk.
       --dir Specify the directory where the loopback files are based.
       --force Don't pause for 10 seconds prior to commencing.
       --help Show help information.
       --hostname Specify the hostname to delete.
       --lvm Specify the volume group to use.
       --manual Read the manual for this script.
       --version Show the version number and exit.

DESCRIPTION

	 This tool will ease the resizing of Xen guests, whether they are based
	upon loopback files or LVM partitions.

	 Whilst the process of resizing a guest is pretty simple it can be fiddly
	to do the steps correctly in the right order:

       1.  Shutdown the guest.	2.  Unmount the volume, if it is mounted.  3.  Add to the space.  4.  Check the filesystem.  5.  Resize the
       filesystem.  6.	Restart the guest.

	 More than once I've heard of users making mistakes and breaking their
	filesystems; hence this tool.

AUTHORS

	Steve Kemp, http://www.steve.org.uk/
	Axel Beckert, http://noone.org/abe/

LICENSE

       Copyright (c) 2005-2009 by Steve Kemp, (c) 2010 by The Xen-Tools Development Team. All rights reserved.

       This module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The LICENSE file contains the
       full text of the license.

4.3.1								    2012-06-30						       XEN-RESIZE-GUEST(8)