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The Service Availability Monitoring (SAM) system is used to monitor the resources within the production infrastructure. SAM monitoring data is used for calculation of availability and reliability of grid sites. It includes the following components:

• probes: a test execution framework (based on the open source monitoring framework Nagios) and the Nagios Configuration Generator (NCG)
• the Aggregated Topology Provider (ATP), the Metrics Description Database (MDDB), and the Metrics Results Database (MRDB)
• the message bus to publish results and a programmatic interface
• the visualization portal (MyEGI).

SAM tool instances

• SAM Instances

Documentation

Introduction

SAM

• SAM Tests terminology and types
• SAM Project home page and SAM milestones

SAM profiles

For RC monitoring

• ROC_CRITICAL - the profile for Availability/Reliability computation of EGI Resource Centres (OPS VO). It replaces WLCG_CREAM_LCGCE_CRITICAL as of 01 Jan 2012.
• ROC_OPERATORS for the definition of the metrics that can generate a operations dashboard alarm when failing
• ROC - all the possible metrics that NCG can use to configure NGI Nagios. NOTE WELL: starting from SAMUpdate-17 the removal of a metric from ROC profile will immediately cause the removal of the metric from all NGI Nagios instances, i.e. tests will no longer be executed.

For operations tools monitoring

• OPS_MONITOR (monitoring of EGI.eu central tools including NGI SAM)

Others

• GLEXEC - gLExec tests

SAM components

• MyEGI
  • MyEGI documentation
  • MyEGI Web Services Specification
• SAM Nagios
• NCG
• Aggregated Topology Provider
• POEM
• ACE
  • Computation Engine
  • Availability Computation Algorithm

User guides

• MyEGI, Nagios, POEM
• SAM-PI documentation (Non official wiki page containing SAM PI examples)

Administrator guides

• SAM Release Notes
• SAM (including configuration via YAIM)
• SAM/NAGIOS Reference Card for sitemanger
• VO SAM
• Monitoring uncertified sites:
  • Setting NAGIOS to Monitor Uncertified Sites
  • IMPORTANT. EGI.eu provides catch-all WMS and BDII services for the monitoring of uncertified sites. The service is open for use, and your NGI can easily apply here.

Probes

• SAM Probes
• EGI probes for software version monitoring
• Probe development policy

Developers guides

Probes development, SAM PI

Support

FAQs and Troubleshooting guides

SAM-related Procedures

• Validate ROC or NGI Nagios Procedures: PROC05
• Setting a Nagios test status to OPERATIONS: PROC06
• Adding new probes to SAM: PROC07
• Management of the EGI OPS Availability and Reliability Profile: PROC08

SAM/Nagios Support in GGUS

• SAM/Nagios EGI Support FAQ
• SAM/Nagios EGI Support Rotas

Resources

• EMI Nagios and status (ARC, dCache, gLite, UNICORE)
• Computation of Service Availability Metrics in ACE
• Andreade, P.; M. Babik, M.; Bhatt, K; Service Availability Monitoring Framework Based On Commodity Software; CHEP12, March 2012 (poster)