Report Storage Extents Without Third-Party Storage Provider

This example shows how to report the disk storage extents that are available to a managed server, in the absence of a dedicated storage provider supplied by a storage vendor. Information about the storage extents is limited when a dedicated storage provider is not installed. The limited information can still be useful for configuring the managed servers in a datacenter.

You can locate disk storage extents by enumerating instances of VMware_HypervisorStorageExtent in the Implementation namespace. The pseudocode in this topic depends on the pseudocode in Make a Connection to the CIMOM.

To report storage extents

Procedure

1. Connect to the server URL.

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

   The actual namespace you will use depends on your installation.

   use wbemlib
   use sys
   use connection renamed cnx
   connection = Null
   
   params = cnx.get_params()
   if params is Null
      sys.exit( -1 )
   connection = cnx.connect_to_host( params )
   if connection is Null
      print 'Failed to connect to: ' + params['host'] + ' as user: ' + params['user']
      sys.exit( -1 )

2. Enumerate instance names of VMware_HypervisorStorageExtent.

   Select the instances where the OtherIdentifyingInfo property begins with ’/vmfs/devices/disks’. For each such instance, print the ElementName, OtherIdentifyingInfo, and OperationalStatus properties.

   use value_mapper renamed mapper
   instances = connection.EnumerateInstances( ’VMware_HypervisorStorageExtent’ )
   for instance in instances
      if instance[ ’OtherIdentifyingInfo’ ][ 0 ] begins ’/vmfs/devices/disks’
         status = mapper.map_instance_property_to_string( connection, \
                                                          instance, \
                                                          ’OperationalStatus’ )
         print ’ Storage Extent = ’ + instance[ ’ElementName’ ]
         print ’   Other Info: ’ + instance[ ’OtherIdentifyingInfo’ ]
         print ’   OperationalStatus: ’ + status
   A sample of the output looks like the following:
   Storage Extent = Local Disk (naa.7001e4e041d08f00119991caf9fd2aaf) 
     Other Info: /vmfs/devices/disks/naa.7001e4e041d08f00119991caf9fd2aaf
     OperationalStatus: OK