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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-create-nfs

XEN-CREATE-NFS(8)					 Perl Programmers Reference Guide					 XEN-CREATE-NFS(8)

NAME

       xen-create-nfs - Create a Xen configuration file for an NFS-root guest.

SYNOPSIS

	 xen-create-nfs [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.

	 Networking Options:
	  --broadcast  The broadcast address to use when configured with a static IP.
	  --dhcp       Configure the guest to use DHCP for IP allocation.
	  --gateway    The gateway address to use when configured with a static IP.
	  --hostname   The hostname to configure for the guest.
	  --ip	       The IP address to use when configured with a static IP.
	  --netmask    The netmask to use when configured with a static IP.
	  --nameserver The nameserver to use when configured with a static IP.

	 General options:
	  --admins     Specify which users should be setup as xen-shell admins.
	  --force      Force the overwriting of an existing configuration file.
	  --initrd     Specify the initial ramdisk for the guest.
	  --kernel     Specify the kernel to use for the guest.
	  --memory     Specify the memory to allocate for this guest.
	  --mac        Specify the MAC address to use for the guest.
	  --template   Specify an alternative template file to use.

	 NFS options:
	  --nfs_server Specify the NFS server to mount the root partition from.
	  --nfs_root   Specify the path, upon the NFS server, to mount.

OPTIONS

       --help Show help information.
       --hostname Specify the hostname to delete.
       --manual Read the manual for this script.
       --version Show the version number and exit.

DESCRIPTION

	 xen-create-nfs is a simple script which allows you to easily create
	a single configuration file for a Xen guest which will mount its remote
	filesystem over an NFS root.

	 It doesn't create any images to use for local storage, and it doesn't
	support more than the minimal number of options to completement the
	existing xen-create-image script, however it is hopefully useful.

REFERENCE

	 For more details on what you'll need to support NFS-root Xen guests
	the following article, written by the author, might be useful:

	   http://www.debian-administration.org/articles/505

AUTHORS

	Steve Kemp, http://www.steve.org.uk/
	StA~Xphane Jourdois

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-CREATE-NFS(8)