unifi-controller: patchelf unifi's sdnotify, nixos/unifi: enable sd_notify, always restart service (#361945)

nixos/modules/services/networking/unifi.nix

@@ -143,10 +143,10 @@ in
       restartTriggers = [ cfg.unifiPackage cfg.mongodbPackage ];
 
       serviceConfig = {
-        Type = "simple";
+        Type = "notify";
         ExecStart = "${cmd} start";
         ExecStop = "${cmd} stop";
-        Restart = "on-failure";
+        Restart = "always";
         TimeoutSec = "5min";
         User = "unifi";
         UMask = "0077";

pkgs/by-name/un/unifi/package.nix

@@ -4,6 +4,7 @@
   dpkg,
   fetchurl,
   nixosTests,
+  systemd,
 }:
 
 stdenv.mkDerivation rec {
@@ -28,6 +29,18 @@ stdenv.mkDerivation rec {
     runHook postInstall
   '';
 
+  postInstall =
+    if stdenv.hostPlatform.system == "x86_64-linux" then
+      ''
+        patchelf --add-needed "${systemd}/lib/libsystemd.so.0" "$out/lib/native/Linux/x86_64/libubnt_sdnotify_jni.so"
+      ''
+    else if stdenv.hostPlatform.system == "aarch64-linux" then
+      ''
+        patchelf --add-needed "${systemd}/lib/libsystemd.so.0" "$out/lib/native/Linux/aarch64/libubnt_sdnotify_jni.so"
+      ''
+    else
+      null;
+
   passthru.tests = {
     unifi = nixosTests.unifi;
   };