Prefect init module

[happysalada]

Things done

I'm close with the module but I still have errors on the worker.
I'm opening this in case someone has some cycles to help.
The prefect server is working but the worker is crashlooping.

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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[happysalada]

I submitted the prefect patch upstream and it was accepted, so the patch is just temporary.

[happysalada]

@nviets just in case you are interested in this.
I'm still debugging the worker service, but the server is working, if you notice anything I've missed, let me know.

[Shihira]

@happysalada Thank you for your package and module, they are very helpful. I succeeded to get the worker service to work as well, and the crash I observed was mainly because the worker spawned another python process that didn't inherit any python package from the main prefect process. My approach was to wrap the prefect environment with a devShell, but maybe the better way could be to use makeWrapper with some fine-tuned arguments.

[happysalada]

I dont get why its trying to spin up an ephemeral server though, if i give it the api url, it should just call that. Im going to wrap the python for the missing uvicorn package this weekend to see what happens.
I suspect this wont fix the problem though as it looka like the workers wont be able to find the main server. Ill try to update this this weekend

[happysalada]

@Shihira ok, I got to the next step, I'm getting a database error "could not open database". i guess I have to add the sqlite path to the readwrite of the worker maybe.
I'm not sure I'll have more time this weekend, but I'll look at this next.

[happysalada]

Ok, I was getting errors when setting the database url environment variable.
For now I'm leaving it not setup to use the default.
I'm going to use this some more before potentially finding a fix.
I think this is ready for a merge, with some potential improvements in database setup left for future updates.