CRPropa Apptainer Image

This repository contains a recipe to build an Apptainer image for CRPropa - the Cosmic Ray Propagation Framework.

Using the Container

A prebuilt container is available in the "releases" section.

To run our example Python app (example.py), use the following command:

apptainer exec crpropa.sif python ./example.py
CosmicRay at z = 0
  source:  Particle 1000010010, E = 200 EeV, x = 100 0 0 Mpc, p = -1 0 0
  current: Particle 1000010010, E = 0.998292 EeV, x = -13173.3 0 0 Mpc, p = -1 0 0
Propagated distance 13273.263588242868 Mpc

Advanced: Building the container locally

Create SIF File

To build the SIF file for production, run:

sudo apptainer build ./Apptainer.sif ./crpropa.def

Development: Build in Sandbox

To build the container in a sandbox environment for development, run:

apptainer build --fakeroot --sandbox sandbox ./crpropa.def

Technical Information

Installing Apptainer on Ubuntu

Follow the installation guide for Apptainer, which works well on recent Ubuntu versions (24.04).

Additional Notes

The container is currently based on the Rocky Linux 9 Docker image.