nixos/chromadb: init

nixos/doc/manual/release-notes/rl-2411.section.md

···
 
 - [Proton Mail bridge](https://proton.me/mail/bridge), a desktop application that runs in the background, encrypting and decrypting messages as they enter and leave your computer. It lets you add your Proton Mail account to your favorite email client via IMAP/SMTP by creating a local email server on your computer.
 
+- [chromadb](https://www.trychroma.com/), an open-source AI application
+  database. Batteries included. Available as [services.chromadb](options.html#opt-services.chromadb.enable).
+
 ## Backward Incompatibilities {#sec-release-24.11-incompatibilities}
 
 - `transmission` package has been aliased with a `trace` warning to `transmission_3`. Since [Transmission 4 has been released last year](https://github.com/transmission/transmission/releases/tag/4.0.0), and Transmission 3 will eventually go away, it was decided perform this warning alias to make people aware of the new version. The `services.transmission.package` defaults to `transmission_3` as well because the upgrade can cause data loss in certain specific usage patterns (examples: [#5153](https://github.com/transmission/transmission/issues/5153), [#6796](https://github.com/transmission/transmission/issues/6796)). Please make sure to back up to your data directory per your usage:

nixos/modules/module-list.nix

···
   ./services/continuous-integration/woodpecker/server.nix
   ./services/databases/aerospike.nix
   ./services/databases/cassandra.nix
+  ./services/databases/chromadb.nix
   ./services/databases/clickhouse.nix
   ./services/databases/cockroachdb.nix
   ./services/databases/couchdb.nix

nixos/modules/services/databases/chromadb.nix

···
+{
+  config,
+  pkgs,
+  lib,
+  ...
+}:
+
+let
+  cfg = config.services.chromadb;
+  inherit (lib)
+    mkEnableOption
+    mkOption
+    mkIf
+    types
+    literalExpression
+    ;
+in
+{
+
+  meta.maintainers = with lib.maintainers; [ drupol ];
+
+  options = {
+    services.chromadb = {
+      enable = mkEnableOption "ChromaDB, an open-source AI application database.";
+
+      package = mkOption {
+        type = types.package;
+        example = literalExpression "pkgs.python3Packages.chromadb";
+        default = pkgs.python3Packages.chromadb;
+        defaultText = "pkgs.python3Packages.chromadb";
+        description = "ChromaDB package to use.";
+      };
+
+      host = mkOption {
+        type = types.str;
+        default = "127.0.0.1";
+        description = ''
+          Defines the IP address by which ChromaDB will be accessible.
+        '';
+      };
+
+      port = mkOption {
+        type = types.port;
+        default = 8000;
+        description = ''
+          Defined the port number to listen.
+        '';
+      };
+
+      logFile = mkOption {
+        type = types.path;
+        default = "/var/log/chromadb/chromadb.log";
+        description = ''
+          Specifies the location of file for logging output.
+        '';
+      };
+
+      dbpath = mkOption {
+        type = types.str;
+        default = "/var/lib/chromadb";
+        description = "Location where ChromaDB stores its files";
+      };
+
+      openFirewall = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to automatically open the specified TCP port in the firewall.
+        '';
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.chromadb = {
+      description = "ChromaDB";
+      after = [ "network.target" ];
+      wantedBy = [ "multi-user.target" ];
+      serviceConfig = {
+        Type = "simple";
+        StateDirectory = "chromadb";
+        WorkingDirectory = "/var/lib/chromadb";
+        LogsDirectory = "chromadb";
+        ExecStart = "${lib.getExe cfg.package} run --path ${cfg.dbpath} --host ${cfg.host} --port ${toString cfg.port} --log-path ${cfg.logFile}";
+        Restart = "on-failure";
+        ProtectHome = true;
+        ProtectSystem = "strict";
+        PrivateTmp = true;
+        PrivateDevices = true;
+        ProtectHostname = true;
+        ProtectClock = true;
+        ProtectKernelTunables = true;
+        ProtectKernelModules = true;
+        ProtectKernelLogs = true;
+        ProtectControlGroups = true;
+        NoNewPrivileges = true;
+        RestrictRealtime = true;
+        RestrictSUIDSGID = true;
+        RemoveIPC = true;
+        PrivateMounts = true;
+        DynamicUser = true;
+      };
+    };
+
+    networking.firewall.allowedTCPPorts = lib.optionals cfg.openFirewall [ cfg.port ];
+  };
+}

nixos/tests/all-tests.nix

···
   cfssl = handleTestOn ["aarch64-linux" "x86_64-linux"] ./cfssl.nix {};
   cgit = handleTest ./cgit.nix {};
   charliecloud = handleTest ./charliecloud.nix {};
+  chromadb = runTest ./chromadb.nix;
   chromium = (handleTestOn ["aarch64-linux" "x86_64-linux"] ./chromium.nix {}).stable or {};
   chrony = handleTestOn ["aarch64-linux" "x86_64-linux"] ./chrony.nix {};
   chrony-ptp = handleTestOn ["aarch64-linux" "x86_64-linux"] ./chrony-ptp.nix {};

nixos/tests/chromadb.nix

···
+{ lib, pkgs, ... }:
+
+let
+  lib = pkgs.lib;
+
+in
+{
+  name = "chromadb";
+  meta.maintainers = [ lib.maintainers.drupol ];
+
+  nodes = {
+    machine =
+      { pkgs, ... }:
+      {
+        services.chromadb = {
+          enable = true;
+        };
+      };
+  };
+
+  testScript = ''
+    machine.start()
+    machine.wait_for_unit("chromadb.service")
+    machine.wait_for_open_port(8000)
+  '';
+}