The Problem On HPC clusters, compute nodes don't have your Python dependencies installed. Apptainer containers carry the entire runtime environment to every node, and this plugin makes Hydra launch ...
Host machine (Pop!_OS) │ ├── Podman (rootless) │ ├── slurmctld ← head/login node (submit jobs here) │ ├── node1 ← compute node 1 (runs slurmd) │ └── node2 ← compute node 2 (runs slurmd) │ ├── shared/ ...