nixos/lubelogger: init

[bct]

Adds a module for LubeLogger, and adds myself as maintainer.

Closes #333954

Things done

• 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.

---

Add a 👍 reaction to pull requests you find important.

[bct]

This is mostly #335653 , with a few modifications:

• fixes "cannot coerce integer to a string"
• adds an environmentFile option, for setting sensitive environment variables
• updates the /var/lib/lubelogger/wwwroot symlinks when the nix package is updated
• hardens the systemd configuration

[Lyndeno]

I'll have a look at this later, I am happy to also be added to the maintainers field for the module.

[bct]

👍 Only changed the maintainer because I wasn't sure you were still up for it.

Unfortunately I pulled at a thread and discovered that this module is not working correctly. Configuration changes get lost when the service is restarted - it's loading userConfig from the ContentRoot in the /nix/store, not from /var/lib/lubelogger.

I've put up a PR for this issue here: hargata/lubelog#781

[bct]

Putting this on hold until 1.4.3 comes out - it's going to remove the need to mix read-only and read-write paths.

[Lyndeno]

Putting this on hold until 1.4.3 comes out - it's going to remove the need to mix read-only and read-write paths.

Check out #375887 and let me know what you think

[bct]

This is ready to go.

[Lyndeno]

I think we should have a line in the 25.04 release notes for this

[nixos-discourse]

This pull request has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/prs-already-reviewed/2617/2218

[SuperSandro2000]

Does it matter if localhost resolves to ipv4 or ipv6?

[bct]

On my system curl '[::1]:5000' and curl 127.0.0.1:5000 both work.

[bct]

https://learn.microsoft.com/en-us/aspnet/core/fundamentals/servers/kestrel/endpoints?view=aspnetcore-9.0

When localhost is specified, Kestrel attempts to bind to both IPv4 and IPv6 loopback interfaces.

[Lyndeno]

I agree with Sandro's suggestions

[Lyndeno]

Is there anything else I can do to support this? Would be great to see this in the 25.05 release.

[bct]

Thanks for the push - updated.

[Lyndeno]

@SuperSandro2000 is there anything else needed to get this through?

[bct]

Rebased & moved the release notes to 25.11.

[Lyndeno]

LGTM

[jmartindf]

I would like to have both this PR and #453649 make it into NixOS 25.11, giving us LubeLogger 1.5.4 and an associated module to run it.

[MattSturgeon]

I have not tested anything, but LGTM.

[MattSturgeon]

Sorry, I think #371458 (comment) got misinterpreted slightly?

[MattSturgeon]

There are a couple minor things I should've spotted in my earlier review. Still LGTM otherwise.