• No progress (no time) made in having latest version in EPEL (current maintainer doesn't seem active)
• In the worst case, the package could be added to the WLCG repo

Singularity added to CernVM 4 Beta: Tests welcome!

Test HTCondor cluster deployed at CERN (details to follow on mailing list)

SUID & Security review:

• A team in Indiana might be able to do a security review (not kickstarted yet)

• Compared to GLExec, there are features in Singularity that might make sites want to deploy it for themselves (e.g. for 2 US CMS sites, Singularity had already been deployed due to other users requirements)

OSG is integrating Singularity into GlideinWMS:

• Currently enabled only for OSG Staff

• Used to debug workflows

• CMS might require sites that want to have RHEL/Centos/SL 7 only worker nodes (not exposing a SL6 environment to the pilot)  to support Singularity (allowing the pilot job to expose a SL6 environment to the payload)