kubernetes-deployments/images/attic.nix

{
  nixpkgs,
  nglib,
  ...
}:
nglib.makeSystem {
  inherit nixpkgs;
  system = "x86_64-linux";
  name = "nixng-attic";

  config = {...}: {
    dinit.enable = true;
    init.services.attic.shutdownOnExit = true;

    services.attic = {
      enable = true;

      settings = {
        # The '+" is to explicitly denote the end of the Vals expression.
        # This is done because we quote the template for the toml file.
        # See: https://github.com/helmfile/vals?tab=readme-ov-file#expression-syntax
        # database.url = "ref+sops://secrets.yml#attic/databaseURL+";
        database = {};

        storage = {
          type = "local";
          path = "/var/lib/atticd/storage";
        };

        listen = "[::]:8080";

        # Data chunking
        #
        # Warning: If you change any of the values here, it will be
        # difficult to reuse existing chunks for newly-uploaded NARs
        # since the cutpoints will be different. As a result, the
        # deduplication ratio will suffer for a while after the change.
        chunking = {
          # The minimum NAR size to trigger chunking
          #
          # If 0, chunking is disabled entirely for newly-uploaded NARs.
          # If 1, all NARs are chunked.
          nar-size-threshold = 64 * 1024; # 64 KiB

          # The preferred minimum size of a chunk, in bytes
          min-size = 16 * 1024; # 16 KiB

          # The preferred average size of a chunk, in bytes
          avg-size = 64 * 1024; # 64 KiB

          # The preferred maximum size of a chunk, in bytes
          max-size = 256 * 1024; # 256 KiB
        };
      };
    };
  };
}