Report Manufacturer, Model, and Serial Number

Taking an inventory of systems in your datacenter can be a first step to monitoring the status of the servers. You can store the inventory data for future use when you monitor configuration changes.

This example shows how to get physical identifying information from the Interop namespace by traversing associations to the CIM_Chassis for the Scoping Instance. Locating Chassis Information from the Base Server Scoping Instance shows the relationships of the CIM objects involved.

If you know the Implementation namespace in advance, you can bypass the Interop namespace. For information about getting physical identifying information by using only the Implementation namespace, see Report Manufacturer, Model, and Serial Number By Using Only the Implementation Namespace.

Figure 1. Locating Chassis Information from the Base Server Scoping Instance
Diagram shows path from scoping instance to CIM_Chassis.

This pseudocode depends on the pseudocode in Make a Connection to the CIMOM and Identifying the Base Server Scoping Instance.

To report manufacturer, model, and serial number

Procedure

  1. Connect to the server URL.

    Specify the Interop namespace, supplied as a parameter, for the connection. 

    use wbemlib
use sys
use connection renamed cnx 
connection = Null

params = cnx.get_params()
if params is Null 
   sys.exit(-1)
interop_params = params
interop_params['namespace'] = 'root/interop'
connection = cnx.connect_to_host( interop_params )
if connection is Null 
   print 'Failed to connect to: ' + params['host'] + ' as user: ' + params['user']
   sys.exit(-1)
  2. Locate the Base Server Scoping Instance of CIM_ComputerSystem. 
    use scoping_instance renamed si

scoping_instance_name = si.get_scoping_instance_name( connection )
if scoping_instance_name is Null
   print 'Failed to find Scoping Instance.'
   sys.exit(-1)
  3. Traverse the CIM_ComputerSystemPackage association to reach the CIM_Chassis instance that corresponds to the managed server. 
    instance_names = connection.AssociatorNames( scoping_instance_name, \
                            AssocClass = 'CIM_ComputerSystemPackage', \
                            ResultClass = 'CIM_Chassis' )
if len( instance_names ) > 1 
   print 'Error:  %d Chassis instances found for Scoping Instance.'  \
         % len ( instance_names )
   sys.exit(-1)
  4. Print the Manufacturer, Model, and SerialNumber properties.

    This example prints additional properties to help identify physical components. 

    instance_name = instance_names.pop()
instance = connection.GetInstance( instance_name )
print ’\n’ + ’CIM_Chassis [’ + instance.classname + ’] =’
for property_name in [ ’ElementName’, ’Tag’, \
      ’Manufacturer’, ’Model’, ’SerialNumber’ ] 
   if instance.key( property_name ) 
      value = instance[ property_name ]
   else 
      value = ’(not available)’
   print ’  %30s : %s’ % ( property_name, value )

A sample of the output looks like the following:
CIM_Chassis [OMC_Chassis] =
                      ElementName : Chassis
                              Tag : 23.0
                     Manufacturer : Cirrostratus Systems
                            Model : 20KF6KM
                     SerialNumber : 67940851