https://www.nas.nasa.gov/hecc/support/kb/188/ https://www.nas.nasa.gov/hecc/support/kb/enabling-user-defined-software-stack-with-apptainer_723.html Apptainer, previously known as Singularity, is an open-source project under the Linux Foundation since November 2021. Apptainer containers provide an application virtualization layer enabling mobility of compute via both application and... Containers/Apptainer Mon, 14 Sep 2026 17:34:26 -0700 https://www.nas.nasa.gov/hecc/support/kb/running-an-apptainer-container-image-on-nas-systems_722.html If you have an existing Apptainer image that is ready to run, you should be able to run it on any platform where Apptainer is installed. This article provides information to help you run an Apptainer container image on NAS systems. Note: A... Containers/Apptainer Mon, 14 Sep 2026 17:33:17 -0700 https://www.nas.nasa.gov/hecc/support/kb/getting-started-with-podman-at-nas_698.html Podman is an experimental offering on NAS systems with the x86_64 architecture. This article helps you get started, provides a list of commands, and outlines the limitations of this offering. For more information about Podman, see the Podman... Containers/Podman Mon, 14 Sep 2026 17:19:54 -0700 https://www.nas.nasa.gov/hecc/support/kb/introduction-to-using-apptainer-build_721.html The information provided in this article can be used on your workstation to build an Apptainer image. Some information here is also useful if you want to grab a ready-to-use Apptainer image from online resources for use on NAS systems. Note: To... Containers/Apptainer Thu, 25 Jun 2026 18:04:49 -0700 https://www.nas.nasa.gov/hecc/support/kb/using-cray-mpich-as-host-mpi-for-running-containers-in-hybrid-mpi-mode-on-athena_726.html Running Apptainer in hybrid MPI mode allows you to call mpiexec or a similar launcher on the apptainer command itself when you execute an Apptainer container with an MPI code. The MPI process outside of the container will then work in tandem with a... Containers/Apptainer Thu, 25 Jun 2026 18:03:33 -0700 https://www.nas.nasa.gov/hecc/support/kb/using-openmpi-as-host-mpi-for-running-containers-in-hybrid-mpi-mode-on-nas-systems_727.html Running Apptainer in hybrid MPI mode allows you to call mpiexec or a similar launcher on the apptainer command itself, when you execute an Apptainer container with an MPI code. The MPI process outside of the container will then work in tandem with... Containers/Apptainer Thu, 25 Jun 2026 18:02:57 -0700 https://www.nas.nasa.gov/hecc/support/kb/running-processes-in-a-podman-container_696.html Note: When running on a compute node, you may need to run the command loginctl enable-linger your_nas_username prior to running the podman command. Otherwise, you may encounter the following error: Error: default OCI runtime "crun" not found:... Containers/Podman Fri, 21 Nov 2025 10:27:32 -0800 https://www.nas.nasa.gov/hecc/support/kb/running-podman-containers-on-a-nas-gpu-node_712.html This article provides basic information on getting started with running a Podman container on one or more GPUs of a NAS Grace Hopper (gh200) or Milan A100 (mil_a100) node. Note: Running Podman containers across nodes is not allowed per NAS... Containers/Podman Tue, 16 Sep 2025 12:18:46 -0700 https://www.nas.nasa.gov/hecc/support/kb/why-is-podman-recommended-for-use-at-nas_699.html Podman is an open-source Linux container management tool developed and maintained by Red Hat. It is a preferred container solution and an alternative to Singularity (currently disabled) for the NAS community mainly due to its daemonless and... Containers/Podman Fri, 21 Mar 2025 18:03:27 -0700 https://www.nas.nasa.gov/hecc/support/kb/preparing-a-podman-image-for-use-on-nas-systems_697.html This article describes several ways of getting an image ready to use on NAS systems: pulling a pre-built image from a registry; building an image with a containerfile; and saving an image to a tar file. Note: Pulling or building an image that... Containers/Podman Thu, 20 Mar 2025 18:40:14 -0700