Very nice article indeed, especially about Singularity. If you still want the simplicity and widest container community (which comes with Docker) then there are more HPC Container solutions out there, for example the fully integrated HPC container scheduling solutions from UNIVA (UniCloud Scheduling for UberCloud HPC Containers, available since 2014), and from Microsoft CycleCloud Provisioning and Scheduling for UberCloud HPC Containers, since 2017). These solutions are as secure as any other container-based tool because these HPC application containers (e.g. for ANSYS, SIMULIA, Siemens) are each running on dedicated cloud resources.
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