January 19, 2024

An open source container solution that unites the world of containers with the world of HPC in unique ways that other containerization solutions haven’t traditionally addressed, allowing for containers to be used in HPC. A mature technology and the continuation of the open source side of the original Singularity project, Apptainer is currently a part of the Linux Foundation and is deployed at thousands of sites worldwide. Apptainer is built with a focus on security for the multi-tenant environments commonly found in HPC, has support for the native integration of hardware/software components commonly found in an HPC cluster like GPUs or MPI stacks with the container environment and the application within it, and uses the SIF format for its containers which has a easy to use definition file and container format that can easily be moved from system to system.