HP WBEM Services for HP-UX System Administrator Guide (5900-1624, April 2011)

How HP WBEM Services works?
This section describes how HP WBEM Services processes requests received from management
clients, and collaborates with respective providers to send information back to these management
clients.
In general, HP WBEM Services can receive requests from clients running on different kind of systems
and platforms, as long as the requests conform to the DMTF CIM-XML standard. HP WBEM Services
processes these client requests and passes them to the appropriate providers. When providers
receive these requests, they gather the requested information and send it back to HP WBEM
Services. The information is sent back to the client by HP WBEM Services.
NOTE: When HP WBEM Services receives information from several registered providers, only
one response is sent to the management client.
Client requests
In a network, any client can send valid requests to HP WBEM Services. Any client request received
by HP WBEM Services must include the following:
• A well-formatted HTTP header
The remote request must be addressed to the HTTP server of HP WBEM Services either on the
wbem-http port or the wbem-https port. All requests must be written in CIM-XML format.
For information about CIM-XML, see Representation of CIM in XML at http://www.dmtf.org/
standards/WBEM.
• Information required and respective parameters
The request must clearly specify the required information along with the corresponding
parameters.
For example, for a GetClass operation, a class name is required. Similarly, a request for
OS information uses the EnumerateInstances operation, and the only requirement is the
class name.
• Namespace
Every client request must include the respective namespace.
For example, the request for OS information specifies the PG_OperatingSystem class in
the root/cimv2 namespace.
A management client can use CIM operations, such as the EnumerateInstances operation. If
you are developing your own classes to gather resource information, you can use the standard
CIM operations, such as the GetClass and GetProperty.
Providers
HP WBEM Services includes some default providers that are installed when HP WBEM Services
is installed. Following providers are available with HP WBEM Services for HP-UX systems:
• “Computer System Provider”
• “Operating System Provider”
• “Process Provider”
• “Domain Name System Provider ”
• “Network Time Protocol Provider”
• “Network Information Service Provider”
• “IP Provider ”
8 Introduction to HP WBEM Services