Xen Management Interfaces using DMTF CIM Technology Mike D. Day - - PowerPoint PPT Presentation

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Xen Management Interfaces using DMTF CIM Technology

Mike D. Day

IBM

CIM Technology Overview

• What is CIM Technology?

– Schema Description Language

• Object semantics
• Inheritance of schema elements
• Methods and Properties

– Standardized Schemas

• Normalized descriptions of computer systems, operating systems,

applications, adaptors, devices, networks, etc.

– Processing Model

• CIM Server: a daemon that provides network access to schema

instances

• Provider: a shared library that instantiates schema instances

– Network Protocol

• XML-RPC/TLS

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schema r epos i t

• ry

Prov ider

( sha red l i b ) s ta t i c p rope r t i es Management app l i ca t i

• n

Management app l i ca t i

• n

xm l / r pc

• ve

r t l s

Daemon ( c im se rve r ) Prov ider

( sha red l i b )

Prov ider

( sha red l i b ) dynamic p rope r t i es

l i b xm/ l i bv i r / xens to re

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Pros/Cons of CIM Technology

• Excellent Abstraction Layer

– Protect apps from changes in lower-level interfaces

• Good interoperability characteristics

– Well supported protocol

• Extensible

– Object semantics, inheritances

• Flexible licensing

– Providers are shared libs

• Industry momentum
• Open-source CIM Servers

– Pegasus – OpenWbem

• Complicated Models

– Standard Schemas too cluttered

• Relations (connection classes)

make for inefficient implementation

• Never the simplest option

– Implementation – Model

• DMTF politics

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Standard Virtualization Schema

• DMTF Workgroup is standardizing virtualization schema

– Hypervisors – Partitions (domains) – Storage virtualization – Virtualization Control Points (dom0)

• Novell, VMWare, IBM, Unisys, many others
• Projected standardization eoy 2006

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Xen CIM Development

• Novell
• IBM
• Unisys
• Xensource
• Others?

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Proposal

• Move provider development into open
• Incorporate into Xen project
• Host on xenbits
• Contribute existing providers