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EasyBuild + EESSI Workshop: Practical info

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This page explains how you can prepare for the EasyBuild and EESSI workshop that takes place just after the EUM'23.

Prepared environment

Tutorial attendees will be able to log in to a prepared environment where they can follow along with hands-on examples, or solve the tutorial exercises.

You can create an account for the prepared environment by filling out the account form. The accounts will not be approved until the day before the event, so please remember to keep a record of your username and password.

Once the account is approved, you will be able to access the system at, or via ssh:

Reproducing the tutorial environment at home (after the workshop): (click to show steps)


These steps might need to be tweaked for your system. Please reach out to us on Slack if you run into problems.

The prepared environment remains available for a few days during the conference. If after the conference you want to go through the tutorial and try the exercises on your home system, you can follow this procedure while working your way through the tutorial:

  • EasyBuild has a set of requirements and dependencies that it expects to find on your system (such as make, patch,... as well as a system C++ compiler to be able to build GCC), you will need to ensure that these are available.

  • Install EasyBuild. We recommend to use the "Installing EasyBuild with EasyBuild" method, but choosing a different directory for the --prefix argument. That directory should then be used wherever /easybuild is used in the tutorial text.

    Assume that the installation directory is stored in $_PREFIX_. The series of commands to install EasyBuild and make the EasyBuild module available are

    module unuse $MODULEPATH
    export EB_TMPDIR=/tmp/$USER/eb_tmp
    python3 -m pip install --ignore-installed --prefix $EB_TMPDIR easybuild
    export PATH=$EB_TMPDIR/bin:$PATH
    export PYTHONPATH=$(/bin/ls -rtd -1 $EB_TMPDIR/lib*/python*/site-packages | tail -1):$PYTHONPATH
    export EB_PYTHON=python3
    eb --install-latest-eb-release --prefix $_PREFIX_
    module use $_PREFIX_/modules/all
    The first line (the module unuse command) cleans the environment and assures that modules already installed on the system will not screw up the installation that you intend to do.

    Alternatively, when newer versions of EasyBuild are available than the version 4.7.1 used to prepare this tutorial, the line with eb --install-latest-eb-release can be replaced with

    eb EasyBuild-4.7.1.eb --prefix $_PREFIX_
    to install the version of EasyBuild used for the preparation of this tutorial.

  • Install the software needed for the tutorial in the same directory structure as EasyBuild. This can be done in a single command (after loading the EasyBuild module). The workings of this command is explained in the "Configuring EasyBuild" and "Basic usage of EasyBuild" sections:

    module load EasyBuild
    eb CMake-3.22.1-GCCcore-11.2.0.eb SciPy-bundle-2021.10-foss-2021b.eb --prefix $_PREFIX_ --robot

Note that the installation can take a few hours and that some steps require a lot of CPU time (e.g., the testing done when installing SciPy), so you may not be able to do it on the login nodes of a cluster.

next: Introduction - (back to overview page)

Last update: April 26, 2023