Notes on the VOMS/VOMRS Service

Service Components

While a Grid Registration Service has had an implementation based on LDAP, it is now based around a VOMS/VOMRS application server and a database backend.

The application server consists of:

  • VOMS application
  • VOMRS web interface for managing VOMS user administration activities
  • VOMS grid map generator (voms-admin)

VOMS High Availability

This is covered in VomsWlcgHa

Equipment required

There is currently no capacity planning information for VOMS so estimates will have to be made.

A standard 3.00GHz 2 CPU configuration with 4GB of memory will be used. Based on real life production data, this configuration could be revisited.

Component Number Purpose
Midrange Server 2 VOMS master and slave machines

Engineering required

Development Purpose
Start/Stop/Status procedure Scripts for VOMS operations
Lemon VOMS availability test A lemon aware sensor which can be used for reporting availability. This should monitor the number of VOMS processes which are running
Linux Heartbeat availability test A Linux-HA aware sensor which would activate the procedure for automatic switch from master to slave
Switch procedure Automatic switch from master to slave changing the DNS alias, disabling the master, enabling the slave in its new master role
Capacity Metric Capacity metrics defined for
Number of renewals / second
Number of inits / second
Quattor configuration for Linux-HA NCM component to configure Linux-HA/Heartbeat

Other Items to Consider

The security for the VOMS server should be kept carefully controlled since it can be used to obtain additional access rights.

Open Items

Nr Description Status Open Date Who Log
1 What processes are required for VOMS operation closed 2006/03/27 Maria VomsStartStopCheck
2 Implementation of voms-ping closed 2006/03/19 Maria + Developers VomsPingScript

Related Documents

-- TimBell - 18 Oct 2005
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Topic revision: r4 - 2006-04-03 - MariaDimou
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