fix xmrig pause

services/xmrig-auto-pause.nix

@@ -0,0 +1,31 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+lib.mkIf config.services.xmrig.enable {
+  systemd.services.xmrig-auto-pause = {
+    description = "Auto-pause xmrig when other services need CPU";
+    after = [ "xmrig.service" ];
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      ExecStart = "${pkgs.python3}/bin/python3 ${./xmrig-auto-pause.py}";
+      Restart = "always";
+      RestartSec = "10s";
+      NoNewPrivileges = true;
+      ProtectHome = true;
+      ProtectSystem = "strict";
+      PrivateTmp = true;
+      RestrictAddressFamilies = [
+        "AF_UNIX" # systemctl talks to systemd over D-Bus unix socket
+      ];
+      MemoryDenyWriteExecute = true;
+    };
+    environment = {
+      POLL_INTERVAL = "3";
+      GRACE_PERIOD = "15";
+      CPU_THRESHOLD = "5";
+    };
+  };
+}