Conda Installations¶
A Conda installation is an actual installation of Conda/Mamba itself, which is used to create the environments that are provided to users.
Warning
Creating a new Conda installation is very rarely required, and is only done if a new major version of Conda is released and an upgrade is not possible.
Creating a New Conda Installation¶
Mambaforge is the recommended installation method, instructions for installation can be found on the Miniforge repository.
Installations are created in /gpfs/exfel/sw/software/mambaforge/, and are named after the version of Mambaforge that is installed. For example, creating a installation of version 22.11 would be done as follows:
wget https://github.com/conda-forge/miniforge/releases/download/22.11.1-4/Mambaforge-22.11.1-4-Linux-x86_64.sh
bash Miniforge3.sh -b -p "/gpfs/exfel/sw/software/mambaforge/22.11"
Once the installation has been created, you should add a mamba-init file to the bin directory of the installation. This file should contain the conda init code sourced to activate the installation, for example:
# >>> conda initialize >>>
# !! Contents within this block are managed by 'conda init' !!
__conda_setup="$('/gpfs/exfel/sw/software/mambaforge/22.11/bin/conda' 'shell.bash' 'hook' 2> /dev/null)"
if [ $? -eq 0 ]; then
eval "$__conda_setup"
else
if [ -f "/gpfs/exfel/sw/software/mambaforge/22.11/etc/profile.d/conda.sh" ]; then
. "/gpfs/exfel/sw/software/mambaforge/22.11/etc/profile.d/conda.sh"
else
export PATH="/gpfs/exfel/sw/software/mambaforge/22.11/bin:$PATH"
fi
fi
unset __conda_setup
if [ -f "/gpfs/exfel/sw/software/mambaforge/22.11/etc/profile.d/mamba.sh" ]; then
. "/gpfs/exfel/sw/software/mambaforge/22.11/etc/profile.d/mamba.sh"
fi
# <<< conda initialize <<<
Do not allow Conda to initialise automatically on xsoft
The initialisation code should not be added to xsoft's shell files, as this will cause the Conda installation to be initialised automatically which is not desirable for the environment management account.
Creating a Modulefile¶
Now that the installation has been created and the init file is present we can create a modulefile by running sh-to-mod on the mamba-init script we just wrote:
$ module sh-to-mod bash /gpfs/exfel/sw/software/mambaforge/22.11/bin/mamba-init
#%Module
prepend-path PATH /gpfs/exfel/sw/software/mambaforge/22.11/condabin
set-function __conda_activate {
if [ -n "${CONDA_PS1_BACKUP:+x}" ]; then
PS1="$CONDA_PS1_BACKUP";
\unset CONDA_PS1_BACKUP;
fi;
\local ask_conda;
ask_conda="$(PS1="${PS1:-}" __conda_exe shell.posix "$@")" || \return;
\eval "$ask_conda";
__conda_hashr}
set-function __conda_exe {
( "$CONDA_EXE" $_CE_M $_CE_CONDA "$@" )}
set-function __conda_hashr {
if [ -n "${ZSH_VERSION:+x}" ]; then
\rehash;
else
if [ -n "${POSH_VERSION:+x}" ]; then
:;
else
\hash -r;
fi;
fi}
set-function __conda_reactivate {
\local ask_conda;
ask_conda="$(PS1="${PS1:-}" __conda_exe shell.posix reactivate)" || \return;
\eval "$ask_conda";
__conda_hashr}
set-function __mamba_exe {
( \local MAMBA_CONDA_EXE_BACKUP=$CONDA_EXE;
\local MAMBA_EXE=$(\dirname "${CONDA_EXE}")/mamba;
"$MAMBA_EXE" $_CE_M $_CE_CONDA "$@" )}
set-function conda {
\local cmd="${1-__missing__}";
case "$cmd" in
activate | deactivate)
__conda_activate "$@"
;;
install | update | upgrade | remove | uninstall)
__conda_exe "$@" || \return;
__conda_reactivate
;;
*)
__conda_exe "$@"
;;
esac}
set-function mamba {
\local cmd="${1-__missing__}";
case "$cmd" in
activate | deactivate)
__conda_activate "$@"
;;
install | update | upgrade | remove | uninstall)
__mamba_exe "$@" || \return;
__conda_reactivate
;;
*)
__mamba_exe "$@"
;;
esac}
setenv _CE_CONDA {}
setenv _CE_M {}
setenv CONDA_EXE /gpfs/exfel/sw/software/mambaforge/22.11/bin/conda
setenv CONDA_PYTHON_EXE /gpfs/exfel/sw/software/mambaforge/22.11/bin/python
setenv CONDA_SHLVL 0
On its own this modulefile will enable the mamba installation, however there are a few changes that should be made:
-
Add
whatisandhelp: -
Add special case for xsoft to place packages in user-readable directory:
Important
The xsoft account is a special case in the activation script, as it is the account performing changes to the environments, so it should not have the CONDA_PKGS_DIRS and CONDA_ENVS_DIRS environment variables set to its home directory.
Now running module load mambaforge/22.11 will activate the installation.
Required Packages¶
The Conda installation should only contain the packages required to create and manage the environments. This means that the base environment should only contain grayskull, boa (mambabuild) and git.
Info
Git is required as the version on Maxwell is very old and does not support some of the commands that Conda/Mamba uses.
You should not install any user packages into the base environment.
So, with the Conda installation activated, run the following commands:
Summary¶
The steps, from start to finish, are:
# Download the installation script
wget https://github.com/conda-forge/miniforge/releases/download/22.11.1-4/Mambaforge-22.11.1-4-Linux-x86_64.sh -o Miniforge-22.11.sh
# Run it to create a new installation
bash Miniforge3.sh -b -p /gpfs/exfel/sw/software/mambaforge/22.11
# Add mamba-init file to /gpfs/exfel/sw/software/mambaforge/22.11/bin/
# Activate the installation
source /gpfs/exfel/sw/software/mambaforge/22.11/bin/mamba-init
mamba env activate base
# Add required base packages
mamba install -c conda-forge grayskull boa git
# Start up a **new shell** and then create the modulefile
module sh-to-mod bash /gpfs/exfel/sw/software/mambaforge/22.11/bin/mamba-init > 22.11
# Make the required changes to the modulefile
vim 22.11