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)