[Halld-offline] Containers Meeting Notes, April 6, 2018

[Mark Ito]

Folks,

Please find the notes below and at

https://halldweb.jlab.org/wiki/index.php/GlueX_Containers_Meeting,_April_6,_2018

   -- Mark

____________________


  GlueX Containers Meeting, April 6, 2018


      Notes

Present: Beni Zihlmann, David Lawrence, Richard Jones, Mark Ito, Thomas 
Britton

  * Mark reported a problem using our standard Singularity container on
    ifarm. Singularity there has auto-bound directory inconsistent with
    our container. Should not be a fundamental problem, but not
    understood at present.
  * David got around the need for ROOT access to build a Singularity
    container on the ifarm by routing the build through SingularityHub.
    The container there is in turn tied to a Docker project (though the
    singularity build is done on demand at present). And Docker is tied
    to a GitHub-resident Dockerfile (of course!).
  * David was able to run a desktop session in the container via a web
    browser using a no-vnc server, as well as using VNC using the
    yes-vnc server. [?]
  * Thomas repeated his report, given at the Offline Meeting, on using
    the OSG for Monte Carlo. Richard has several comments:
      o bringing random trigger files along with the job might be
        slowing job start-up
      o condor_shadow processes start when the job starts on the remote node
      o Condor supports batch submission. Thomas will explore using this
        in MCwrapper.
      o batch submission makes it easier to recall thousands of jobs
        should the need arise
  * Mark: update of the CVMFS-resident GlueX software stack with new
    versions has gone swimmingly.
  * Mark: no progress with including XROOTD as part of said stack
  * we will meet in a week

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  * This page was last modified on 8 April 2018, at 20:13.

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