QueryAssignedLicenses problem getting ESX host licensed features

[Aristizabal]

Hello,

I am trying to obtain the list of licensed features for a vSphere 4.0 host using the the QueryAssignedLicenses method via perl SDK.

I can get the license Manager object but every time I get the managed object "LicenseAssignmentManager" it is undefined.

Here is the code I am using:

my $host;

my $host_views =

Vim::find_entity_views(view_type => 'HostSystem');

$host = @$host_views[0];

my $licenseSystem = Vim::get_view(mo_ref => ($host->configManager->licenseManager) );

my $licenses = Vim::get_view(mo_ref => ($licenseSystem->licenseAssignmentManager) );

my $licenseDummy = $licenses->QueryAssignedLicenses();

And this is the error message:

"Can't call method "type" on an undefined value at /usr/share/perl/5.8/VMware/VICommon.pm line 1244."

I have tried assigning the return value of QueryAssignedLicenses(); directly to an object but the result is the same, and I think the method can't be called since the LicenseAssignmentManager" object is undefined.

As pointed out on the thread: http://communities.vmware.com/message/1271444, I tried with different methods but all of them are deprecated for vSphere and I get a SOAP error.

Any help is highly appreciated.

Thanks.

Juan Aristizabal.

[lamw]

The reason this is occurring is because the licenseAssignmentManager is not actually available and so when you try to get a reference to that object, it's actually returning NULL and then you try to perform a method on an unknown object.

You should always check to see if it's valid before attempting an operation, good to put it in eval {...} statement.

eval {
my $licenseDummy = $licenses->QueryAssignedLicenses();
};
if($@) {  print "ERROR: . $@ . "\n"; }

Basically, licenseAssignmentManager is only available when connecting to a vCenter server and not to an individual host

=========================================================================

William Lam

VMware vExpert 2009,2010

VMware scripts and resources at:

Twitter: @lamw

Getting Started with the vMA (tips/tricks)

Getting Started with the vSphere SDK for Perl

VMware Code Central - Scripts/Sample code for Developers and Administrators

VMware Developer Community

If you find this information useful, please award points for "correct" or "helpful".

[Aristizabal]

Thanks for the reply William.

I modified my script and now I run it against a vCenter server. I get the HostSystem object and then I try to get the LicenseManager object from it, but now the object is undefined. Before I was able to get the LicenseManager talking directly to the ESX host.

Here is the code I am using:

my $hostname = Opts::get_option('hostname');

my $host_view = Vim::find_entity_view(view_type => 'HostSystem',filter => {name => $hostname});

my $licenseSystem = $host_view->configManager->licenseManager;

print $licenseSystem;

And this is the error I get when I run it:

Use of uninitialized value in print at ./check_license.pl line 33.

Juan.

[lamw · Accepted solution]

When connecting to vCenter, you're unable to access the LicenseManager through the HostSystem object, you need to use the vCenter's Service Content: http://www.vmware.com/support/developer/vc-sdk/visdk400pubs/ReferenceGuide/vim.LicenseManager.html

That is where you'll find licenseAssignmentManager

=========================================================================

William Lam

VMware vExpert 2009,2010

VMware scripts and resources at:

Twitter: @lamw

Getting Started with the vMA (tips/tricks)

Getting Started with the vSphere SDK for Perl

VMware Code Central - Scripts/Sample code for Developers and Administrators

VMware Developer Community

If you find this information useful, please award points for "correct" or "helpful".

[Aristizabal]

Thanks William, that makes sense; I got it working now.

Juan.