add basic test for postgresql

flake.nix

@@ -284,6 +284,17 @@ rec {
         # Uncomment the line to build an installer image
         # This is EXTREMELY LARGE and will make builds take forever
         # installer.x86_64-linux = nixosConfigurations.installer.config.system.build.isoImage;
+        tests = let
+          pkgs = import nixpkgs {
+            system = "x86_64-linux";
+            overlays = [
+              self.overlays.x86_64-linux
+              args.nix-packages.overlays.x86_64-linux.default
+            ];
+          };
+        in {
+          postgresql = pkgs.callPackage ./new-infra/containers/postgresql/test.nix {};
+        };
       };
   };
 }

new-infra/containers/postgresql/default.nix

@@ -35,6 +35,14 @@
         enable = true;
       };
       system.stateVersion = "24.05";
+      systemd.tmpfiles.rules = [
+        "d /persist - postgresql postgresql - -"
+        "d /backup - postgresql postgresql - -"
+      ];
     };
   };
+  systemd.tmpfiles.rules = [
+    "d /persist/postgresql - - - - -"
+    "d /persist/backup/postgresql - - - - -"
+  ];
 }

new-infra/containers/postgresql/test.nix

@@ -0,0 +1,18 @@
+{pkgs ? import <nixpkgs> {}, ...}:
+pkgs.testers.runNixOSTest {
+  name = "postgresql";
+
+  nodes.postgresql = {
+    config,
+    pkgs,
+    ...
+  }: {
+    imports = [
+      ./default.nix
+    ];
+    system.stateVersion = "23.11";
+  };
+  testScript = ''
+    postgresql.wait_for_unit("container@postgresql.service")
+  '';
+}

new-infra/devices/nas.nix

@@ -1,5 +1,5 @@
 {
   imports = [
-    ../containers/postgresql.nix # TODO
+    ../containers/postgresql/default.nix # TODO
   ];
 }