Skip to content

Pilot repository

Pilot software stack (2020.12)


The current EESSI pilot software stack (version 2020.12) is the 4th iteration, and there are some known issues and limitations, please take these into account:

  • First of all: the EESSI pilot software stack is NOT READY FOR PRODUCTION!

Do not use it for production work, and be careful when testing it on production systems!

Reporting problems

If you notice any problems, please report them via

Accessing the EESSI pilot repository through Singularity

The easiest way to access the EESSI pilot repository is by using Singularity. If Singularity is installed already, no admin privileges are required. No other software is needed either on the host.

A container image is available in Docker Hub (see It only contains a minimal operating system + the necessary packages to access the EESSI pilot repository through CernVM-FS.

The container image can be used directly by Singularity (no prior download required), as follows:

  • First, create some local directories in /tmp/$USER which will be bind mounted in the container:

    mkdir -p /tmp/$USER/{var-lib-cvmfs,var-run-cvmfs,home}
    These provides space for the CernVM-FS cache, and an empty home directory to use in the container.

  • Set the $SINGULARITY_BIND and $SINGULARITY_HOME environment variables to configure Singularity:

    export SINGULARITY_BIND="/tmp/$USER/var-run-cvmfs:/var/run/cvmfs,/tmp/$USER/var-lib-cvmfs:/var/lib/cvmfs"
    export SINGULARITY_HOME="/tmp/$USER/home:/home/$USER"

  • Start the container using singularity shell, using --fusemount to mount the EESSI config and pilot repositories (using the cvmfs2 command that is included in the container image):

    export EESSI_CONFIG="container:cvmfs2 /cvmfs/"
    export EESSI_PILOT="container:cvmfs2 /cvmfs/"
    singularity shell --fusemount "$EESSI_CONFIG" --fusemount "$EESSI_PILOT" docker://eessi/client-pilot:centos7-$(uname -m)

  • This should give you a shell in the container, where the EESSI config and pilot repositories are mounted:

    $ singularity shell --fusemount "$EESSI_CONFIG" --fusemount "$EESSI_PILOT" docker://eessi/client-pilot:centos7-$(uname -m)
    INFO:    Using cached SIF image
    CernVM-FS: pre-mounted on file descriptor 3
    CernVM-FS: pre-mounted on file descriptor 3
    CernVM-FS: loading Fuse module... done
    CernVM-FS: loading Fuse module... done

  • It is possible that you see some scary looking warnings, but those can be ignored for now.

To verify that things are working, check the contents of the /cvmfs/ directory:

Singularity> ls /cvmfs/
compat  init  software

Setting up the EESSI environment

Once you have the EESSI pilot repository mounted, you can set up the environment by sourcing the provided init script:

source /cvmfs/

If all goes well, you should see output like this:

Singularity> source /cvmfs/
Found EESSI pilot repo @ /cvmfs/!
Derived subdirectory for software layer: x86_64/amd/zen2
Initializing Lmod...
Prepending /cvmfs/ to $MODULEPATH...

*** Known problems in the 2020.12 pilot software stack ***

1) No Lmod cache has been generated yet for the module files included
   in the 2020.12 pilot software stack.
   As a result, 'module' commands may be somewhat slow.
   (see also

Environment set up to use EESSI pilot software stack, have fun!
[EESSI pilot 2020.12] $

Now you're all set up! Go ahead and explore the software stack using "module avail", and go wild with testing the available software installations!

Testing the EESSI pilot software stack

Please test the EESSI pilot software stack as you see fit: running simple commands, performing small calculations or running small benchmarks, etc.

Test scripts that have been verified to work correctly using the pilot software stack are available at .

Giving feedback or reporting problems

Any feedback is welcome, and questions or problems reports are welcome as well, through one of the EESSI communication channels:

Available software

(last update: Jan 7th 2021)

EESSI currently supports the following HPC applications as well as all their dependencies:

  • GROMACS (2020.1)
  • OpenFOAM (v2006 and 8)
  • R 4.0.0 + R-bundle-Bioconductor 3.11
  • TensorFlow (2.3.1)
  • OSU-Micro-Benchmarks (5.6.3)
[EESSI pilot 2020.12] $ module --nx avail

------------------------------ /cvmfs/ ------------------------------
   Bazel/3.6.0-GCCcore-9.3.0                                       ScaLAPACK/2.1.0-gompi-2020a
   Bison/3.5.3-GCCcore-9.3.0                                       SciPy-bundle/2020.03-foss-2020a-Python-3.8.2
   Boost/1.72.0-gompi-2020a                                        Szip/2.1.1-GCCcore-9.3.0
   CGAL/4.14.3-gompi-2020a-Python-3.8.2                            Tcl/8.6.10-GCCcore-9.3.0
   CMake/3.16.4-GCCcore-9.3.0                                      TensorFlow/2.3.1-foss-2020a-Python-3.8.2
   DB/18.1.32-GCCcore-9.3.0                                        Tk/8.6.10-GCCcore-9.3.0
   DBus/1.13.12-GCCcore-9.3.0                                      UCX/1.8.0-GCCcore-9.3.0
   Doxygen/1.8.17-GCCcore-9.3.0                                    UDUNITS/2.2.26-foss-2020a
   EasyBuild/4.3.2                                                 UnZip/6.0-GCCcore-9.3.0
   Eigen/3.3.7-GCCcore-9.3.0                                       X11/20200222-GCCcore-9.3.0
   FFTW/3.3.8-gompi-2020a                                          Xvfb/1.20.9-GCCcore-9.3.0
   FFmpeg/4.2.2-GCCcore-9.3.0                                      Zip/3.0-GCCcore-9.3.0
   FriBidi/1.0.9-GCCcore-9.3.0                                     cairo/1.16.0-GCCcore-9.3.0
   GCC/9.3.0                                                       double-conversion/3.1.5-GCCcore-9.3.0
   GCCcore/9.3.0                                                   expat/2.2.9-GCCcore-9.3.0
   GLPK/4.65-GCCcore-9.3.0                                         flatbuffers/1.12.0-GCCcore-9.3.0
   GLib/2.64.1-GCCcore-9.3.0                                       fontconfig/2.13.92-GCCcore-9.3.0
   GMP/6.2.0-GCCcore-9.3.0                                         foss/2020a
   GObject-Introspection/1.64.0-GCCcore-9.3.0-Python-3.8.2         freetype/2.10.1-GCCcore-9.3.0
   GROMACS/2020.1-foss-2020a-Python-3.8.2                          giflib/5.2.1-GCCcore-9.3.0
   GSL/2.6-GCC-9.3.0                                               git/2.23.0-GCCcore-9.3.0-nodocs
   Ghostscript/9.52-GCCcore-9.3.0                                  gnuplot/5.2.8-GCCcore-9.3.0
   HDF5/1.10.6-gompi-2020a                                         gompi/2020a
   HarfBuzz/2.6.4-GCCcore-9.3.0                                    groff/1.22.4-GCCcore-9.3.0
   ICU/66.1-GCCcore-9.3.0                                          gzip/1.10-GCCcore-9.3.0
   ImageMagick/7.0.10-1-GCCcore-9.3.0                              h5py/2.10.0-foss-2020a-Python-3.8.2
   JasPer/2.0.14-GCCcore-9.3.0                                     hwloc/2.2.0-GCCcore-9.3.0
   Java/11.0.2                                             (11)    libGLU/9.0.1-GCCcore-9.3.0
   JsonCpp/1.9.4-GCCcore-9.3.0                                     libcerf/1.13-GCCcore-9.3.0
   LAME/3.100-GCCcore-9.3.0                                        libdrm/2.4.100-GCCcore-9.3.0
   LLVM/9.0.1-GCCcore-9.3.0                                        libevent/2.1.11-GCCcore-9.3.0
   LMDB/0.9.24-GCCcore-9.3.0                                       libfabric/1.11.0-GCCcore-9.3.0
   LibTIFF/4.1.0-GCCcore-9.3.0                                     libffi/3.3-GCCcore-9.3.0
   LittleCMS/2.9-GCCcore-9.3.0                                     libgd/2.3.0-GCCcore-9.3.0
   Lua/5.3.5-GCCcore-9.3.0                                         libglvnd/1.2.0-GCCcore-9.3.0
   METIS/5.1.0-GCCcore-9.3.0                                       libiconv/1.16-GCCcore-9.3.0
   MPFR/4.0.2-GCCcore-9.3.0                                        libjpeg-turbo/2.0.4-GCCcore-9.3.0
   Mako/1.1.2-GCCcore-9.3.0                                        libpciaccess/0.16-GCCcore-9.3.0
   MariaDB-connector-c/3.1.7-GCCcore-9.3.0                         libpng/1.6.37-GCCcore-9.3.0
   Mesa/20.0.2-GCCcore-9.3.0                                       libsndfile/1.0.28-GCCcore-9.3.0
   Meson/0.55.1-GCCcore-9.3.0-Python-3.8.2                         libunwind/1.3.1-GCCcore-9.3.0
   NASM/2.14.02-GCCcore-9.3.0                                      libxml2/2.9.10-GCCcore-9.3.0
   NLopt/2.6.1-GCCcore-9.3.0                                       lz4/1.9.2-GCCcore-9.3.0
   NSPR/4.25-GCCcore-9.3.0                                         makeinfo/6.7-GCCcore-9.3.0
   NSS/3.51-GCCcore-9.3.0                                          ncdf4/1.17-foss-2020a-R-4.0.0
   Ninja/1.10.0-GCCcore-9.3.0                                      netCDF/4.7.4-gompi-2020a
   OSU-Micro-Benchmarks/5.6.3-gompi-2020a                          nettle/3.6-GCCcore-9.3.0
   OpenBLAS/0.3.9-GCC-9.3.0                                        networkx/2.4-foss-2020a-Python-3.8.2
   OpenFOAM/v2006-foss-2020a                                       nsync/1.24.0-GCCcore-9.3.0
   OpenFOAM/8-foss-2020a                                   (D)     numactl/2.0.13-GCCcore-9.3.0
   OpenMPI/4.0.3-GCC-9.3.0                                         pixman/0.38.4-GCCcore-9.3.0
   PCRE/8.44-GCCcore-9.3.0                                         pkg-config/0.29.2-GCCcore-9.3.0
   PCRE2/10.34-GCCcore-9.3.0                                       pkgconfig/1.5.1-GCCcore-9.3.0-Python-3.8.2
   PMIx/3.1.5-GCCcore-9.3.0                                        protobuf-python/3.13.0-foss-2020a-Python-3.8.2
   Pango/1.44.7-GCCcore-9.3.0                                      protobuf/3.13.0-GCCcore-9.3.0
   ParaView/5.8.0-foss-2020a-Python-3.8.2-mpi                      pybind11/2.4.3-GCCcore-9.3.0-Python-3.8.2
   Perl/5.30.2-GCCcore-9.3.0                                       re2c/1.3-GCCcore-9.3.0
   Python/2.7.18-GCCcore-9.3.0                                     scikit-build/0.10.0-foss-2020a-Python-3.8.2
   Python/3.8.2-GCCcore-9.3.0                              (D)     snappy/1.1.8-GCCcore-9.3.0
   Qt5/5.14.1-GCCcore-9.3.0                                        util-linux/2.35-GCCcore-9.3.0
   R-bundle-Bioconductor/3.11-foss-2020a-R-4.0.0                   x264/20191217-GCCcore-9.3.0
   R/4.0.0-foss-2020a                                              x265/3.3-GCCcore-9.3.0
   SCOTCH/6.0.9-gompi-2020a                                        xorg-macros/1.19.2-GCCcore-9.3.0
   SQLite/3.31.1-GCCcore-9.3.0                                     zstd/1.4.4-GCCcore-9.3.0

Architecture and micro-architecture support


  • generic (currently implies march=x86-64 and -mtune=generic)
  • AMD
    • zen2 (Rome)
  • Intel
    • haswell
    • skylake_avx512


  • generic (currently implies -march=armv8-a and -mtune=generic)
  • Marvell Thunder X2

EasyBuild configuration

EasyBuild v4.3.2 was used to install the software in the 2020.12 version of the pilot repository. For some installations pull requests with changes that will be included in EasyBuild v4.3.2 were leveraged, see the build script that was used.

An example configuration of the build environment based on can be seen here:

$ eb --show-config
# Current EasyBuild configuration
# (C: command line argument, D: default value, E: environment variable, F: configuration file)
buildpath         (D) = /tmp/eessi-build/singularity-home/.local/easybuild/build
containerpath     (D) = /tmp/eessi-build/singularity-home/.local/easybuild/containers
debug             (E) = True
filter-deps       (E) = Autoconf, Automake, Autotools, binutils, bzip2, cURL, flex, gettext, gperf, help2man, intltool, libreadline, libtool, M4, ncurses, XZ, zlib
filter-env-vars   (E) = LD_LIBRARY_PATH
ignore-osdeps     (E) = True
installpath       (E) = /cvmfs/
module-extensions (E) = True
repositorypath    (D) = /tmp/eessi-build/singularity-home/.local/easybuild/ebfiles_repo
robot-paths       (D) = /cvmfs/
rpath             (E) = True
sourcepath        (E) = /tmp/eessi-build/easybuild/sources:
sysroot           (E) = /cvmfs/
trace             (E) = True
zip-logs          (E) = bzip2

Last update: February 18, 2021