autotier: init at 1.2.0, lib45d: init at 0.3.6, nixos/autotierfs: init module

[philipwilk]

Description of changes

lib45d is a direct dependency of autotier and nothing else afaik so merging them in one pr is appropriate imo. The new module lets you enable/configure autotier.

The option is as simple as possible:.

services.autotierfs.enable
services.autotierfs.package 
services.autotierfs.settings

The setting option expects an attrset of INIs, with each attr being one autotier tier.
Such as:

services.autotierfs.settings = {
  "/mnt/autotier" = {
    Global = {
      "Log Level" = 1;
      "Tier Period" = 1000;
      "Copy Buffer Size" = "1 MiB";
    };
    "Tier 1" = {
       Path = "/mnt/tier";
       Quota = "30GiB";
     };
     "Tier 2" = {
       Path = "/pool/tier";
       Quota = "200GiB";
     };
  };
  "/mnt/autotier2" = {
    Global = {
      "Log Level" = 1;
      "Tier Period" = 1000;
      "Copy Buffer Size" = "1 MiB";
    };
    "Tier 1" = {
       Path = "/mnt/tier2";
       Quota = "30GiB";
     };
     "Tier 2" = {
       Path = "/pool/tier2";
       Quota = "200GiB";
     };
   };
};

etc. Configurations are put int /etc/autotier/ for easy access for use with the autotier command. Adding your user to the autotier group lets you use it without root.

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/)
• 24.11 Release Notes (or backporting 23.11 and 24.05 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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[philipwilk]

The service generator works! Uses wantedBy = [ "local-fs.target" ]; to get automounted at boot/system rebuild etc.
Here it is using the sample config from the pr description.

I havent done speed/balancing tests to validate that autotier itself is working as intended, but creating files is working, and the nixos module is now working as expected.

[philipwilk]

Tested after applying changes and it is working locally on one disk on my pc. Late February I am building a new nas so will be able to test it in prod at that point across hard drives+ssds.

This MR is ready for testing now, the pr can be applied to your local nixpkgs via

url = "https://github.com/NixOS/nixpkgs/pull/335846.patch";
hash = "sha256-mafTBM6zk4KnyVPtzhAUbeR7B8JRhrGitYk25afwr6U=";

[getchoo]

Otherwise LGTM. Feel free to ping in a couple days if there are no other reviews -- or whenever you have finished testing ;)

Edit: This should also go into the new modules section of the release notes

Changes were addressed

[getchoo]

Could this get a mention in the release notes?