Web Services Management Framework version 2'0 A presentation to WSDMTC

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Web Services Management Framework - version
2.0A 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 http//devresource.hp.
  com/wsmf/
• 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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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

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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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WSMF Components
Service
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
Security
Messaging

Web Services
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Relationship to the existing work
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Relationship to the existing work
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WSMF-Foundation Conceptual Architecture
Resources
Managed Object Hierarchy
WSDL
intf1
intf2
porttype1
Relationship
Relationship
porttype2
capabilities
collection of interfaces
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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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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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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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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
WSEE1
WSEE2
ContainedIn
ContainedIn
ContainedIn
ContainedIn
Contains
Contains
Contains
Contains
DependsOn
DependsOn
Service1
Service2
Service3
Service4
DependedUpon
DependedUpon
Contains
Contains
ContainedIn
ContainedIn
ContainedIn
CorrespondsTo
Contains
Contains
ContainedIn
Conv3
Conv5
Conv6
CorrespondsTo
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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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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