1. HP Team in OASIS WSDM TC Date: July 29, 2003
Web Services Management Framework - version 2.0 A presentation to WSDM-TC
HP Team in OASIS WSDM TC
Date: July 29, 2003

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Agenda
Introduction
Technical overview
Current Status
Submission to WSDM TC
Call for action
Q/A and discussion
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Introduction
Web Services Management Framework (WSMF) 2.0 publicly released on 7/21/03
Specifications available at
WSMF is a set of specifications that address the requirements of a manageability solution for both MUWS and MOWS.
Developed by HP over the course of one year with input from partners and customers.
Share experience in the Web services Mgmt. area gained by developing and testing new interface technology with our ISV partners.
Contributed to OASIS WSDM TC.
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4. WSMF Technical Overview
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WSMF Technical Overview
Whats and Whys
WSMF components
Relationship with existing technologies
WSMF-Foundation
WS-Events
How does it work?
WSMF-WSM
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What WSMF IS
A manageability framework for interfacing management systems and resources in a platform (e.g. information model) independent way
Using Web services
description, discovery and access of interfaces
distributed computing environment
Open, flexible and extensible architecture
Flexibility in distribution of implementation and who, where and how many can access
can be implemented gradually by an ISV
A collection of specifications
manager
WSMF
resource
for example, status * performance * availability
for example, control * correlated info * infrastructure changes
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What WSMF IS NOT
A modeling framework
Common modeling elements or a specific model
however, WSMF-WSM includes a model for Web services domain
An instrumentation or agent technology
A product
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Why WSMF?
Started with a need to manage Web services as resource but there are much greater needs:
Today's IT systems are getting complex!
Multiple users of manageability information brought on by this complexity and distribution of the resources being managed (e.g., federation of management functionality, distribution of the management system, "plug" management products and resources)
Management system functionality is moving towards the infrastructure (e.g., self healing systems, load balancing, cluster management)
IT services (or service view) introduce dynamic element (create/modify/EOL)
WSMF directly addresses some of the problems and provides a platform from which to address others
Applications need a language and platform independent way to expose their management capability
Web services are becoming pervasive for such uses
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8. WSMF Components WSMF-WSM WSMF- Foundation WS-Events Web Services
Conversation
WSMF-WSM
WsExecutionEnvironment
Attributes
Operations
MO interface collection
WSMF-
Foundation
Error Reporting
Grouping/Categorization
Identification
Relationships
Life-cycle
Bindings
WS-Events
Notification Schema
Subscription
Delivery
Discovery
Description
Messaging
Security …
Web Services
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9. Relationship to the existing work
SNMP/MIB
SNMP proxy
CIM/WBEM
JMX
Proprietary
Management System
Managed Systems
WBEM proxy
JMX proxy
custom proxy
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10. Relationship to the existing work
SNMP/MIB
CIM/WBEM
JMX
Proprietary
Management System
Managed Systems
WSMF I/F
WSMF
Registry Svcs
(ex: UDDI)
any application
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11. WSMF-Foundation Conceptual Architecture
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WSMF-Foundation Conceptual Architecture
Resources
Managed Object Hierarchy
WSDL
intf1
Managed
Object for R1 R1
intf2
porttype1 R8
Relationship R7
Relationship
porttype2
Managed
Object for R2 R2 R4
Managed
Object for R4
+ capabilities
+ collection of interfaces
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Resources -> Managed Objects
Capabilities -> Interfaces (Attributes, Operations, Notifications)
Interfaces -> defined as a set of WSDL portTypes in the same namespace
Managed Object -> implement WSDL portTypes
WSDL is the standard that is used to describe capabilities of a managed object. We’re modeling the WSMF management access as services and their capabilities are described in these management WSDLs.
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12. WSMF-Foundation Architecture (Contd.)
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WSMF-Foundation Architecture (Contd.)
Managed Objects are the management representation of managed resources.
implement collection of interfaces which define management capabilities.
supply these capabilities to the managed resources.
may be implemented as part of the managed resource or in a different environment.
When a Managed Object implements an interface, it is referred to as that Managed Object type.
Relationships define the behavior and the dependencies between managed objects (model) and consequently the resources that they represent.
To better support the various Web services managed domains, WSMF intends to remain model neutral and will support any model.
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- A managed object is something that you want to monitor for status and state change, performance, configuration, control, etc.
- In WSMF management components should be created based on the resources that are required to support that standard which is used.
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13. WSMF-Foundation Architecture (Contd.)
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WSMF-Foundation Architecture (Contd.)
Collection of Interfaces are logical representations of a set of capabilities for MOs.
Collection of Interfaces have the following components:
namespace
Attributes
Operations
Notifications
Each attribute, operation, or notification belongs to a category
WSMF has one abstract core interface – Managed Object
There are 6 core categories:
Monitoring
Discovery
Control
Performance
Configuration
Security
Additional categories for notifications
Interfaces can be further extended.
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Managed Object: This is a base interface that consolidates many capabilities of managed objects.
Service: Mgmt. capabilities of a service resource.
Conversation: A service’s view of the state associated with a set of related messages
Wsee: Mgmt. capabilities of a web services execution environment.
Intermediary: Mgmt. capabilities of a SOAP intermediary.
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Dynamic Attributes and Meta Information
Changing the current attributes support approach (get/set operations per attribute) to better support:
Scalability as the number of attributes increase
Dynamic creation of attributes
Bulk access to multiple attributes (without the use of the collection interface)
Various information models
A global pair of get/set operations
Add Meta information support for managed objects and its components (attributes, operations, notifications)
Introspection
Access control
Policies
Finer granularity of meta information
Etc.
Supported by:
Direct operations:
getOperationMetaInfo(…)
setAttributesMetaInfo(…)
Use of XPATH filters supported by a global pair of get/set operations
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WS-Events
Base schema for event notifications
Subscription based delivery
Discovery of event types
Two modes of notification delivery
pull (synchronous)
push (asynchronous)
Exposed through Web service interfaces
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How does it work?
Design time
From scratch (no model/implementation exists)
Create the model. Identify manageable resources, their attributes, operations, relationships and events.
Develop the WSDL of managed objects corresponding to manageable resources
Do the implementation using your favorite Web services platform
A model/implementation exists using a technology for which WSMF adapter does not exist
Create a WSMF adapter
A model/implementation exists using a technology for which WSMF adapter exists
Deploy the WSMF adapter
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17. How does it work? (Contd.)
Runtime
A WSMF compliant manager “discovers” an initial set of managed object WSDL URLs
It discovers more managed objects by accessing relationships of already discovered managed objects
It accesses these managed objects, their attributes and operations through the interface specified in their WSDLs
It subscribes for event notifications and receives them (either in pull or push mode)
It can perform the same operation on a collection of managed objects through the collection interface
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WSMF-WSM
WSMF-WSM is an application of WSMF-Foundation to providing manageability information with the effect that Web services can be managed by a management system.
WSMF-WSM can be further extended as required to support additional features of Web services
WSMF-WSM defines three managed objects:
Service
WSEE
Conversation
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WSMF-WSM
ContainedIn
WSEE1
ContainedIn
ContainedIn
WSEE2
ContainedIn
Contains
Contains
Contains
Contains
DependsOn
DependsOn
Service1
Service2
Service3
Service4
DependedUpon
DependedUpon
Contains
Contains
ContainedIn
ContainedIn
CorrespondsTo
ContainedIn
Contains
Contains
ContainedIn
Conv3
CorrespondsTo
Conv5
Conv6
Contains
Conv2
CorrespondsTo
CorrespondsTo
CorrespondsTo
CorrespondsTo
ContainedIn
Contains
ContainedIn
Conv1
CorrespondsTo
Conv4
CorrespondsTo
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Current Status
Has gone through multiple rounds of HP-internal and partner reviews
HP-internal and partner implementations exist
Defining a WSMF/CIM mapping
Working with GGF
We have reviewed the WSMF contribution with the Globus in a two day working session.
We are working with Globus to refactor WSMF Foundation and Events specifications to exploit OGSI to achieve a more powerful expression of a generalized web services framework for building management interfaces
We are looking to WSDM to build on these interfaces to incorporate the WSMF WSM + Foundation contributions towards management of web services using web services.
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Submission to WSDM TC
Submission of WSMF to the WSDM TC
Complies with OASIS IPR policies
Not all parts of WSMF might be appropriate for the WSDM TC to tackle. HP is open to working with other groups (e.g. GGF) if better suited to use some parts of WSMF.
HP will commit several of the WSMF authors to participate in WSDM for efficiency and to provide the benefit of lessons learned in creating WSMF.
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22. Call for action WSMF is a modular and validated solution to
Events
MUWS
MOWS
The WSDM TC has the skills and variety of experience to improve it further.
Starting with a strong basis like WSMF is key to meeting our charter goals and schedule. And most importantly, meeting the needs of the industry.
Call for participation
First meeting
NOW
Final deliverable
February 13, 2003
April 2, 2003
July 28, 2003
January 2004
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