lmod-hierarchy-explorer

This is a nodejs Passenger app meant to be run from Open OnDemand.

It provides an interface similar to module avail, but on the whole hierarchy. Since a module might require others to be loaded first (hierarchy), when a user clicks on a module, that module and all prerequisite modules are automatically added to a module load command displayed at the top of the page. Since the command may fail, the command is run and its output is displayed at the top of the page.

A cron job should be set up to update the hierarchy json files (make-json.py).

disclaimer

I don't use express to serve content. I manually parse the request path and read/send a file from the filesystem. I do not promise that there isn't some vulnerability in this logic that allows the reading of an arbitrary file. An Open OnDemand Passenger app is run as the user, so this type of exploit isn't really a concern for me.

dependencies:

• Lmod (I used 8.6.19)
• node (I used 14.21.3)
• npm (I used 6.14.18)
• python (I used 3.8.10)

install

git clone (example for Open OnDemand)

cd /var/www/ood/apps/sys/
mkdir modules && cd modules
git clone https://github.com/simonLeary42/lmod-hierarchy-explorer.git .

install nodeJS libraries (package.json)

npm install

configure public/arch2modulepath.json

This is a dictionary where the key is a CPU architecture (example: uname -m) and the value is the MODULEPATH environment variable used for the Lmod spider.

{
  "noarch": "/opt/modulefiles/noarch",
  "x86_64": "/opt/modulefiles/x86_64",
  "aarch64": "/opt/modulefiles/aarch64",
  "ppc64le": "/opt/modulefiles/ppc64le"
}

configure public/lmod-paths.json

{
  "spider": "/usr/share/lmod/lmod/libexec/spider",
  "profile": "/usr/share/lmod/lmod/init/profile",
  "lmodrc": "/opt/lmod/config/lmodrc.lua",
  "package_dir": "/opt/lmod/config/package-dir"
}

configure the settings in make-json.py

• HIDDEN_PARENT_DIRS : list of directories which should be moved into the hidden modules section
• VERSION_BLACKLIST : list of module versions that should not be displayed at all, even in the hidden modules section

build json files

./make-json.py

configure public/{custom_top.html,custom_bottom.html,custom.css}

These files have the Unity header / footer by default, but you will want to replace them with your own HTML/CSS.

notes

you may also have to add the app to your OOD dashboard layout, but after version 3.0 this won't be necessary