Yoink slurmhelpers out of the Slurm snap

[NucciTheBoss]

As the title suggests, I want to drop slurmhelpers from the Slurm snap package. What originally started out as "hey this is pretty cool" has proved to be more trouble than it's worth. There's a couple good reasons to consider dropping it:

• slurmhelpers is blocking our migration to core24 which forces us to still rely on the rocm PPA we have set up for Jammy Jellyfish
  • [Bug]: Python-based hooks do not work on older distributions slurm-snap#19
• It's holding up CI for HPC libs
  • [Bug]: Configure hooks are busted now that context manager is used to generate slurm.conf ondemand  slurm-snap#47
• Synchronization issues
  • The slurm.conf configuration that exists within the snap's data may not always be in sync with the actual slurm.conf file under $SNAP_COMMON. You can edit the slurm.conf file directly and those changes will not be reflected within the snaps configuration.

Alternatives

We still need the .env file to help configure how the Slurm and MUNGE daemons within the Slurm snap package behave. For this we're using the dotenv Python package. Tbh I would prefer if we just removed Python entirely, and replaced it with something else. Our options are:

1. Use a dotenv CLI utility from the Ubuntu Archive and use shell hooks.
2. Can use something quickly written in Go that leverages the godotenv package.

Either way I think we should aim to remove slurmhelpers so it removes current and doesn't cause any future blockers. Would like to know your thoughts @jedel1043, @wolsen, and @jamesbeedy 🤔

[jedel1043]

Yeah, that sounds like a good idea. The alternatives are a lot more portable overall, and switching to a more portable option will definitely make the snap a lot more robust.

[jamesbeedy]

@NucciTheBoss I like the idea of removing it from the snap and putting it into the charm and useing it for generic slurm.conf generation for any slurm.conf, not just for the snapped slurm. +1

[NucciTheBoss]

Seems like we're in agreement here so I will begin the yoinking process 🛠️