Apptainer backend

Common on ARM and GPU clusters. Build images locally with singularity build --fakeroot, push to /projects/$project/containers/.

Recipe templates

~/.claude/contexts/hpc-templates/apptainer/ contains recipes for: - nest-arm.def — NEST for an ARM cluster - nest-x86.def — NEST for an x86 cluster - jax-gpu.def — JAX + CUDA for a GPU cluster - pytorch-gpu.def — PyTorch + CUDA for a GPU cluster

Usage

# .labflow.yaml (project root)
env:
  backend: apptainer
  image: /projects/myproj/containers/nest-arm.sif