Singularity Flux

This will reproduce the example here.

Usage

Pull the container with Singularity and oras:

$ singularity pull oras://ghcr.io/rse-ops/singularity-mpi:mpich

You might want an allocation (with or without userns):

$ salloc --userns

Try running the container:

$ mpirun -n 6 singularity exec singularity-mpi_mpich.sif /opt/mpitest

Hello, I am rank 1/6
Hello, I am rank 2/6
Hello, I am rank 3/6
Hello, I am rank 4/6
Hello, I am rank 0/6
Hello, I am rank 5/6

And then try running with flux

$ flux start mpirun -n 6 singularity exec singularity-mpi_mpich.sif /opt/mpitest