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SAM Nagios probes refactoring TF

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Mandate

  • assess the support status of various Nagios probes available
    • recommend removal or replacement of unsupported probes from the SAM Nagios framework
    • request improvement/correction of supported ones
    • ease their maintenance and support by:
      • reducing the numer of probes
      • reducing the dependencies between services (a reported service error should not be caused by the problems of another service in the same site)
  • improve documentation:
    • availability of references to the individual nagios probes/tests descriptions in a central place
    • update known documentations web pages with proper references (avoid broken links)
    • improve developers guides
    • require change to SAM to remove harcoded documentation URLs in metrics configuration

Reference:OMB, June 26, 2014 - Re-factoring SAM probes

Tasks

Documentation

Generic improvements

  • eliminate Broken Links
  • collect all documentation links in a central place
  • create a unique page collecting descriptions of all available tests/probes

Developers Documentation

  • collect requierments and suggestions from Developers

Probes

Identified Issues

  • NGI SAM Nagioses have documentation URL hardcoded in metric configuration
    • changing the URLs requires SAM update
    • Solution: - Plan the Change
  • SAM CE Nagios framework is unsupported
    • used for WN* tests
    • Solution: - replace them
  • SRM tests (add reference) cause false alarms on new DPM versions (tests for SRM API all the interfaces published in the Top-BDII) (add link to GGUS tkt)
    • Solution: - ??
  • org.gstat.SanityCheck - not maintained anymore
    • checks small subset of BDII GLUE 1.2 data
    • (add reference to profiles were it is enabled)
    • Solution: replace with org.bdii.GLUE2-Validate - through validation of GLUE 2 data
  • LFC decommissioning - with implications in tests depending on it
    • org.sam.WN-Rep* (CREAM-CE)
    • org.sam.WN-Rep* (CREAM-CE)
    • Solutions:
      • remove all LFC-dependent tests, or find replacement
      • deploy dedicated LFC and reconfigure all NGI SAM Nagioses
  • SAM requires unsupported software
    • UMD 2 middleware:
      • Solution: migration to UMD-3 planned in September - Follow-Up
    • CentOS/SL5
      • Solution: - migration to CentOS/SL6 planned within EGI InSPIRE JRA2 activity
  • org.sam.SRM-GetTURLs fails if webdav is published
    • the probe takes from the BDII the list of protocols published in the GlueSEAccessProtocol object and tries to access them using SRM. This fails for webdav.
    • Solution:
      • CERN DPM PT is developping a webdav SAM probe
      • improve org.sam.SRM-GetTURLs, under dCache PT maintenance, to not ask/test SRM for a webdav TURL
  • MPI Nagios probe issues for GE batch system
    • GGUS #101406 - WARNING: Publishes GlueCEPolicyMaxCPUTime (30) / GlueCEPolicyMaxWallClockTime (30) < 4
    • Solution
      • rewriting the test to take into acount that GE provider now also provides correct CPU limit in the BDII per core
      • include it in the next SAM update
  • remove/replace FTS(2) probes
    • FTS2 has been decommissioned since the 1st of August;
    • the Nagios FTS probes are not suited for FTS3 and so they can be removed.
    • Solution:
      • follow-up with TP (OliverK & MaiteBL) the development of FTS3 probes

TF Activity


Task No. Description Status
1 Replace all references to "grid-monitoring.egi.eu" with "mon.egi.eu" DONE
2 Update all broken links in SAM In Progress
4 provide lists of all ROC SAM tests, in ROC_SAM_Tests DONE
4.1 update description of ROC SAM tests, in ROC_SAM_Tests In Progress
5 include info from SAM_Tests in SAM, and obsolete it In Progress
x etc ToDo

SAM/ARGO Roadmap

People

  • Cristina Aiftimiei
  • Emir Imamagic
  • Peter Solagna

Agendas

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