Attendance: Gavin, Miguel, Dave, Andrej
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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- WC2 (Andrew, mounting PWD), somewhat superseded by WC6.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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