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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 OSX

pdb_odsam

PDB_ODSAM(8)															      PDB_ODSAM(8)

NAME

       pdb_odsam - Open Directory account information database for smbd

SYNOPSIS

       The  pdb_odsam  plugin  is  the	default  account information database backend used on Mac OS X. It makes users and groups record from Open
       Directory available to Samba.

       idmap_odsam should always be used in conjunction with the odsam passdb backend.

OPTIONS

       odsam: map guest to guest = BOOL
	      If this is true (the default), pdb_odsam map the literal username "guest" to the configured guest account.  This	makes  "guest"	an
	      alias for the configured guest account regardless of whether an account named "guest" exists or not.

       odsam: msglevel = LEVEL
	      LEVEL is the integer log level at which pdb_odsam should emit log messages.  The lower LEVEL is, the more verbose the log messages.

       odsam: traceall = BOOL
	      If  this	is  true,  pdb_odsam  will  emit log messages for all Open Directory calls. If it is false (the default), it will only log
	      errors.

EXAMPLES

	    [global]
		idmap domain = default
		idmap config default:default = yes
		idmap config default:backend = odsam

		idmap alloc backend = odsam

		passdb backend = odsam

		odsam: msglevel = 0    # Log at debugging levels
		odsam: traceall = no   # Do not trace Open Directory calls

BUGS

       Please report bugs to Apple.

SEE ALSO

       DirectoryService(8), smb.conf(5), smbd(8)

																      PDB_ODSAM(8)