Adopt the same Singularity interface as OSG/HTCondor

[gonzalomerino]

Once we have singularity in NPX, it would be nice that users with CentOS7 jobs can run on the grid by requesting singularity in just one way. Can we plan on adopting the same switches than OSG for our pyglideins?

see: https://support.opensciencegrid.org/support/solutions/articles/12000024676-docker-and-singularity-containers

universe = vanilla
executable = job.sh
Requirements = HAS_SINGULARITY == TRUE

+SingularityImage = "/cvmfs/singularity.opensciencegrid.org/opensciencegrid/osgvo-el7"
+SingularityBindCVMFS = True

should_transfer_files = IF_NEEDED
when_to_transfer_output = ON_EXIT

output = out
error = err
log = log

queue

[gonzalomerino]

First we need to check what is the current status of Singularity support within HTCondor

[dsschult]

http://research.cs.wisc.edu/htcondor/manual/v8.7/3_17Singularity_Support.html