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| -rw-r--r-- | lib/spack/docs/workflows.rst | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/spack/docs/workflows.rst b/lib/spack/docs/workflows.rst index 7e6b32b866..140c0e5649 100644 --- a/lib/spack/docs/workflows.rst +++ b/lib/spack/docs/workflows.rst @@ -1208,6 +1208,9 @@ MPI Due to the dependency on Fortran for OpenMPI, which is the spack default implementation, consider adding ``gfortran`` to the ``apt-get install`` list. +Recent versions of OpenMPI will require you to pass ``--allow-run-as-root`` +to your ``mpirun`` calls if started as root user inside Docker. + For execution on HPC clusters, it can be helpful to import the docker image into Singularity in order to start a program with an *external* MPI. Otherwise, also add ``openssh-server`` to the ``apt-get install`` list. |