See https://twiki.cern.ch/twiki/bin/view/LCG/WLCGContainers for working group page and actions. Agreed baseline doc is here.

WLCG Containers Working Group

Europe/Zurich
31/S-028 (CERN)

31/S-028

CERN

30
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Attendance: Gavin, Miguel, Dave, Andrej

Minutes

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Action review

https://twiki.cern.ch/twiki/bin/view/LCG/WLCGContainers#Actions

  • WC6 added last time, requesting upstream feature to implement (effective) overlay in a non-privilege way, https://github.com/singularityware/singularity/issues/1207. Some discussion on the ticket and its been assigned, but no action yet.
  • WC1 (contact EPEL maintainer), no progress
  • WC2 (Andrew, mounting PWD), somewhat superseded by WC6.
  • WC3 (Andrej, comment on bind-mount tricks). Can review WC6 once we have something.
  • WC4 (Jacob, Dave, CVMFS/Overlay/Singularity issue). No progress.
  • WC5 (Gavin, google doc). Some comments added, to integrate.

Discussion

  • Singularity deployment ongoing for CMS. Some sites doing sec review.

 

  • Dave reviewed 3 (of his) pull requests on Singularity:
    • https://github.com/singularityware/singularity/pull/1212 - doc update, though possibly a bug
    • https://github.com/singularityware/singularity/pull/1221 - fix to restore shim init functionality
    • https://github.com/singularityware/singularity/pull/1230 - packaging fix for image handlers
  • Not much merging happening in Singularity upstream since start of December...

 

  • Dave noted (at FNAL) unprivileged image manipulation from docker images doesn't work on Singularity, though no reason why it couldn't. Could be fixed upstream.
    • In meantime, Oli provded a tool "docker2oci" that does this.

 

  • Singularity 2.4 package is due to be released from OSG any day now - we'll update the WLCG repo as soon as we have it.

 

  • Next meeting (31st) conflicts with CERNVM workshop. Suggest bump to 7th or 14th Feb.

 

 

 

 

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