Difference: CmsSingularity (8 vs. 9)

Revision 92018-01-31 - RokasMaciulaitis

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META TOPICPARENT name="BrianBockelman"

CMS Singularity Support

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Verify CVMFS and SITECONF

CVMFS must be functioning on the host OS; currently, the images live inside the /cvmfs/singularity.opensciencegrid.org repository. This repository must be available on your host (either through autofs or static mounts). If you are unsure if this is available, you can simply type ls /cvmfs/singularity.opensciencegrid.org to see if any errors occur.

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Also make sure that /cvmfs/oasis.opensciencegrid.org/ is available as well.
  The contents of /cvmfs/cms.cern.ch/SITECONF/local must be visible inside the container. If you configure CVMFS such that the local symlink evaluates to a directory outside CVMFS, then three options exist:
  1. Switch to distributing the contents of SITECONF/local via to CVMFS.
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  • Change the permissions for CMS files such that the CMS pilot user can read CMS data.
  • Bind mount the storage to /cms and update storage.xml accordingly. To be visible, a bind mount must be used (symlinks will not suffice).
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Stageout will occur as the pilot UID. Given the user / production separation requirements for CMS, this implies you will need to stageout through a grid service (GridFTP, Xrootd, HTTPS) instead of using POSIX-based cp). The cmspilot user should not have generic write access to all local files.
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Stageout will occur as the pilot UID. Given the user / production separation requirements for CMS, this implies you will need to stageout through a grid service (GridFTP, Xrootd, HTTPS) instead of using POSIX-based cp). Check your site-local-config.xml and change plugin in local/fallback stageout sections if needed. The cmspilot user should not have generic write access to all local files.
 

Testing

 
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