I did a quick test to see if I can use Podman in combination with Open
MPI:
[test@test1 ~]$ mpirun --hostfile ~/hosts podman run
quay.io/adrianreber/mpi-test /home/mpi/hello
Hello, world (1 procs total)
--> Process # 0 of 1 is alive. ->789b8fb622ef
Hello, world (1 procs total)
--> Process # 0 of 1 is alive. ->749eb4e1c01a
The test program (hello) is taken from
https://raw.githubusercontent.com/openhpc/ohpc/obs/OpenHPC_1.3.8_Factory/tests/mpi/hello.c
The problem with this is that each process thinks it is process 0 of 1
instead of
Hello, world (2 procs total)
--> Process # 1 of 2 is alive. ->test1
--> Process # 0 of 2 is alive. ->test2
My questions is how is the rank determined? What resources do I need to have
in my container to correctly determine the rank.
This is Podman 1.4.2 and Open MPI 4.0.1.
Adrian
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