nixos/immich: add enableVectors option

Signed-off-by: Sefa Eyeoglu <contact@scrumplex.net>

nixos/doc/manual/release-notes/rl-2511.section.md

@@ -198,7 +198,7 @@
 
 - `services.ntpd-rs` now performs configuration validation.
 
-- Immich now has support for [VectorChord](https://github.com/tensorchord/VectorChord) when using the PostgreSQL configuration provided by `services.immich.database.enable`, which replaces `pgvecto-rs`. VectorChord support can be toggled with the option `services.immich.database.enableVectorChord`.
+- Immich now has support for [VectorChord](https://github.com/tensorchord/VectorChord) when using the PostgreSQL configuration provided by `services.immich.database.enable`, which replaces `pgvecto-rs`. VectorChord support can be toggled with the option `services.immich.database.enableVectorChord`. Additionally, `pgvecto-rs` support is now disabled from NixOS 25.11 onwards using the option `services.immich.database.enableVectors`. This option will be removed fully in the future once Immich drops support for `pgvecto-rs` fully.
 
 - `services.postsrsd` now automatically integrates with the local Postfix instance, when enabled. This behavior can disabled using the [services.postsrsd.configurePostfix](#opt-services.postsrsd.configurePostfix) option.
 

nixos/modules/services/web-apps/immich.nix

@@ -187,6 +187,12 @@ in
         // {
           default = true;
         };
+      enableVectors =
+        mkEnableOption "pgvecto.rs in the database. You may disable this, if you have migrated to VectorChord and deleted the `vectors` schema."
+        // {
+          default = lib.versionOlder config.system.stateVersion "25.11";
+          defaultText = lib.literalExpression "lib.versionOlder config.system.stateVersion \"25.11\"";
+        };
       createDB = mkEnableOption "the automatic creation of the database for immich." // {
         default = true;
       };
@@ -238,8 +244,14 @@ in
       }
       {
         # When removing this assertion, please adjust the nixosTests accordingly.
-        assertion = cfg.database.enable -> lib.versionOlder config.services.postgresql.package.version "17";
-        message = "Immich doesn't support PostgreSQL 17+, yet.";
+        assertion =
+          (cfg.database.enable && cfg.database.enableVectors)
+          -> lib.versionOlder config.services.postgresql.package.version "17";
+        message = "Immich doesn't support PostgreSQL 17+ when using pgvecto.rs. Consider disabling it using services.immich.database.enableVectors if it is not needed anymore.";
+      }
+      {
+        assertion = cfg.database.enable -> (cfg.database.enableVectorChord || cfg.database.enableVectors);
+        message = "At least one of services.immich.database.enableVectorChord and services.immich.database.enableVectors has to be enabled.";
       }
     ];
 
@@ -255,16 +267,17 @@ in
       ];
       extensions =
         ps:
-        [ ps.pgvecto-rs ]
+        lib.optionals cfg.database.enableVectors [ ps.pgvecto-rs ]
         ++ lib.optionals cfg.database.enableVectorChord [
-          ps.vectors
+          ps.pgvector
           ps.vectorchord
         ];
       settings = {
-        shared_preload_libraries = [
-          "vectors.so"
-        ]
-        ++ lib.optionals cfg.database.enableVectorChord [ "vchord.so" ];
+        shared_preload_libraries =
+          lib.optionals cfg.database.enableVectors [
+            "vectors.so"
+          ]
+          ++ lib.optionals cfg.database.enableVectorChord [ "vchord.so" ];
         search_path = "\"$user\", public, vectors";
       };
     };
@@ -273,11 +286,13 @@ in
         extensions = [
           "unaccent"
           "uuid-ossp"
-          "vectors"
           "cube"
           "earthdistance"
           "pg_trgm"
         ]
+        ++ lib.optionals cfg.database.enableVectors [
+          "vectors"
+        ]
         ++ lib.optionals cfg.database.enableVectorChord [
           "vector"
           "vchord"
@@ -286,7 +301,7 @@ in
           ${lib.concatMapStringsSep "\n" (ext: "CREATE EXTENSION IF NOT EXISTS \"${ext}\";") extensions}
 
           ALTER SCHEMA public OWNER TO ${cfg.database.user};
-          ALTER SCHEMA vectors OWNER TO ${cfg.database.user};
+          ${lib.optionalString cfg.database.enableVectors "ALTER SCHEMA vectors OWNER TO ${cfg.database.user};"}
           GRANT SELECT ON TABLE pg_vector_index_stat TO ${cfg.database.user};
 
           ${lib.concatMapStringsSep "\n" (ext: "ALTER EXTENSION \"${ext}\" UPDATE;") extensions}

nixos/tests/all-tests.nix

@@ -741,6 +741,7 @@ in
   ifm = runTest ./ifm.nix;
   iftop = runTest ./iftop.nix;
   immich = runTest ./web-apps/immich.nix;
+  immich-vectorchord-migration = runTest ./web-apps/immich-vectorchord-migration.nix;
   immich-public-proxy = runTest ./web-apps/immich-public-proxy.nix;
   incron = runTest ./incron.nix;
   incus = pkgs.recurseIntoAttrs (

nixos/tests/web-apps/immich-vectorchord-migration.nix

@@ -0,0 +1,71 @@
+{ ... }:
+{
+  name = "immich-vectorchord-migration";
+
+  nodes.machine =
+    { lib, pkgs, ... }:
+    {
+      # These tests need a little more juice
+      virtualisation = {
+        cores = 2;
+        memorySize = 2048;
+        diskSize = 4096;
+      };
+
+      environment.systemPackages = with pkgs; [ immich-cli ];
+
+      services.immich = {
+        enable = true;
+        environment.IMMICH_LOG_LEVEL = "verbose";
+        # Simulate an existing setup
+        database.enableVectorChord = lib.mkDefault false;
+        database.enableVectors = lib.mkDefault true;
+      };
+
+      # TODO: Remove when PostgreSQL 17 is supported.
+      services.postgresql.package = pkgs.postgresql_16;
+
+      specialisation."immich-vectorchord-enabled".configuration = {
+        services.immich.database.enableVectorChord = true;
+      };
+
+      specialisation."immich-vectorchord-only".configuration = {
+        services.immich.database = {
+          enableVectorChord = true;
+          enableVectors = false;
+        };
+      };
+    };
+
+  testScript =
+    { nodes, ... }:
+    let
+      specBase = "${nodes.machine.system.build.toplevel}/specialisation";
+      vectorchordEnabled = "${specBase}/immich-vectorchord-enabled";
+      vectorchordOnly = "${specBase}/immich-vectorchord-only";
+    in
+    ''
+      def psql(command: str):
+        machine.succeed(f"sudo -u postgres psql -d ${nodes.machine.services.immich.database.name} -c '{command}'")
+
+      def immich_works():
+        machine.wait_for_unit("immich-server.service")
+
+        machine.wait_for_open_port(2283) # Server
+        machine.wait_for_open_port(3003) # Machine learning
+        machine.succeed("curl --fail http://localhost:2283/")
+
+      immich_works()
+
+      machine.succeed("${vectorchordEnabled}/bin/switch-to-configuration test")
+
+      immich_works()
+
+      psql("DROP EXTENSION vectors;")
+      psql("DROP SCHEMA vectors;")
+
+      machine.succeed("${vectorchordOnly}/bin/switch-to-configuration test")
+
+      immich_works()
+    '';
+}

nixos/tests/web-apps/immich.nix

@@ -18,9 +18,6 @@
         enable = true;
         environment.IMMICH_LOG_LEVEL = "verbose";
       };
-
-      # TODO: Remove when PostgreSQL 17 is supported.
-      services.postgresql.package = pkgs.postgresql_16;
     };
 
   testScript = ''

pkgs/by-name/im/immich/package.nix

@@ -273,7 +273,7 @@ buildNpmPackage' {
 
   passthru = {
     tests = {
-      inherit (nixosTests) immich;
+      inherit (nixosTests) immich immich-vectorchord-migration;
     };
 
     machine-learning = immich-machine-learning;