Distributed Account Management Middleware

1
Distributed Account Management Middleware

• Glenn Bresnahan (PI), Boston University
• Steve Quinn (CoPI), NCSA
• Aaron Fuegi, Boston University
• Chris Pond, NCSA
• Michael Shapiro, NCSA
• Ester Soriano, NCSA

2
Objective

• Provide mechanisms to allow for the automated
  management of resource allocations, resource
  access control, user information, user login
  accounts, and usage reporting in a grid
  environment spanning multiple administrative
  domains

3
Background

• Alliance partnership (PACI)
• NCSA, Boston, Kentucky, New Mexico, Wisconsin,
  Maui
• NSF PACI Allocation Peer Review (NRAC and AAB)
• Manage accounts, allocations and reporting across
  Alliance resources

4
Requirements

• Compatible with current practices (e.g. PACI)
• Independent of local account management system
• Heterogeneous environment
• Multiple administration domains
• Economic model neutral

5
Strategy

• Provide grid services to exchange and manipulate
  shared accounting objects
• Resource requests
• Resources allocations
• User information
• Project/group information
• Access permissions
• Usage reports

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AMIE Data Representation

• XML schema for Accounting Objects
• Machines
• Users
• Accounts
• Allocations
• Usage

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AMIE Architecture

• Transaction-based exchange mechanism
• Transaction comprised of sequence of packets
  (messages) and acknowledgements
• Sites send Requests and Notifications
• Site A requests site B to perform an action
• Site B notifies site A of actions taken
• Independently or as the result of a request
• Set of objects and states
• Well defined state change sequences
• Robust error detection and recovery
• Asynchronous or real-time communication
• No transport reliability assumptions
• Glue modules to interface to site-specific
  accounting system

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Configuration Star
9
Configuration Peer to Peer
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Current Implementations

• Alliance Partner Sites (Version 1)
• Alliance Grid Testbed (Version 1)
• Teragrid (Version 2 NMI)
• NEES Grid (Version 2 NMI)
• (implementation in progress)

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Transaction Example 1Account Creation
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Transaction Example 2Modify User Information
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Transaction Example 3Usage Reporting
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Transaction States

• Four possible states
• On-hold - Waiting for another event. No
  further action should be taken until state
  changes.
• In-progress processing is underway
• Completed processing completed
• Error processing failed. More information is
  available via the packet state

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Transaction Packet States Incoming Packets

• Construct Message being assembled
• Received Complete and ready to be processed
• Validate Waiting for XML validation
• Inbox Waiting to be put into AMIE DB
• Done All processing sucessfully completed
• Error Awaiting error notification to be issued
• Failed Completed with failure

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Transaction Packet States Outgoing Packets

• Construct Message being assembled
• Validate Waiting for XML validation
• Outbox Waiting to be transmitted
• Sent Sucessfully sent to remote site
• Wait Waiting for a reply
• Done All processing sucessfully completed
• Error Awaiting error notification to be issued
• Failed Completed with failure

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AMIE Reference Implementation
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Current Status Items Complete

• Core AMIE system
• XML Schema
• XML validation
• Method call interface specification
• Transport/processing engine
• State tracking
• Error handling
• Testbed Implementation

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Current Status Reference Implementation

• Reference implementation of AMIE method call
  interface
• Relational "intermediate DB" schema (Oracle,
  Postgres, Sybase support) to interface AMIE to
  local AM system

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Current Status In Development

• Reference implementation of Account Management
  system
• fully functional AM DB Schema
• method call implementation
• glue between AM system and AMIE implementation
• Should be "drop in" AM system with grid
  capability through AMIE

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Current Status Packaging

• Core implementation
• Reference implementation of method call interface
• Reference AM implementation
• Documentation

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Distributed Account Management

• Questions?