As one of my last tasks in XSEDE, I updated and improved the tutorial about running Singularity containers in the HPC system Espanse at my institution the San Diego Supercomputer Center.
The new version of the tutorial is available on the Github repository zonca/expanse_singularity
See the README.md file for the table of contents linking to the subsection.
The most important changes were focused on using pre-built containers, either from DockerHub or from the repository maintained by SDSC’s Marty Kandes, and on building custom images either via Sylabs Builder, a cloud-based service that builds containers on demand, or using a Virtual Machine on Jetstream 2, the NSF-funded Openstack cloud deployment.