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LCG Web>LCGServiceChallenges>ProgressLogs>ServiceChallengeFourProgress>ScFourServiceTechnicalFactors>VomsNotes (2006-04-03, MariaDimou)
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LCG Web>LCGServiceChallenges>ProgressLogs>ServiceChallengeFourProgress>ScFourServiceTechnicalFactors>VomsNotes (2006-04-03, MariaDimou) EditAttachPDFNotes 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 VomsWlcgHaEquipment 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
Related Documents
-- TimBell - 18 Oct 2005
Topic revision: r4 - 2006-04-03 - MariaDimou
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