From a288e18e6dce551fceed24ad8f72e8b4c9d08667 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Tue, 31 Mar 2026 17:47:53 -0400
Subject: [PATCH] grafana: qbt stats

---
 services/monitoring.nix | 96 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 94 insertions(+), 2 deletions(-)

diff --git a/services/monitoring.nix b/services/monitoring.nix
index b80be0b..3031018 100644
--- a/services/monitoring.nix
+++ b/services/monitoring.nix
@@ -49,6 +49,36 @@ let
     '';
   };
 
+  qbittorrentCollector = pkgs.writeShellApplication {
+    name = "qbittorrent-collector";
+    runtimeInputs = with pkgs; [
+      curl
+      jq
+    ];
+    text = ''
+      QBIT="http://${config.vpnNamespaces.wg.namespaceAddress}:${toString config.services.qbittorrent.webuiPort}"
+      OUT="${textfileDir}/qbittorrent.prom"
+
+      if info=$(curl -sf --max-time 5 "''${QBIT}/api/v2/transfer/info"); then
+        dl=$(echo "$info" | jq '.dl_info_speed')
+        ul=$(echo "$info" | jq '.up_info_speed')
+      else
+        dl=0
+        ul=0
+      fi
+
+      {
+        echo '# HELP qbittorrent_download_bytes_per_second Current download speed in bytes/s'
+        echo '# TYPE qbittorrent_download_bytes_per_second gauge'
+        echo "qbittorrent_download_bytes_per_second $dl"
+        echo '# HELP qbittorrent_upload_bytes_per_second Current upload speed in bytes/s'
+        echo '# TYPE qbittorrent_upload_bytes_per_second gauge'
+        echo "qbittorrent_upload_bytes_per_second $ul"
+      } > "''${OUT}.tmp"
+      mv "''${OUT}.tmp" "$OUT"
+    '';
+  };
+
   dashboard = {
     editable = true;
     graphTooltip = 1;
@@ -442,7 +472,48 @@ let
         };
       }
 
-      # -- Row 3: Intel GPU --
+      # -- Row 3: qBittorrent --
+      {
+        id = 11;
+        type = "timeseries";
+        title = "qBittorrent Speed";
+        gridPos = {
+          h = 8;
+          w = 24;
+          x = 0;
+          y = 16;
+        };
+        datasource = promDs;
+        targets = [
+          {
+            datasource = promDs;
+            expr = "qbittorrent_download_bytes_per_second";
+            legendFormat = "Download";
+            refId = "A";
+          }
+          {
+            datasource = promDs;
+            expr = "qbittorrent_upload_bytes_per_second";
+            legendFormat = "Upload";
+            refId = "B";
+          }
+        ];
+        fieldConfig = {
+          defaults = {
+            unit = "binBps";
+            min = 0;
+            color.mode = "palette-classic";
+            custom = {
+              lineWidth = 2;
+              fillOpacity = 15;
+              spanNulls = true;
+            };
+          };
+          overrides = [ ];
+        };
+      }
+
+      # -- Row 4: Intel GPU --
       {
         id = 8;
         type = "timeseries";
@@ -451,7 +522,7 @@ let
           h = 8;
           w = 24;
           x = 0;
-          y = 16;
+          y = 24;
         };
         datasource = promDs;
         targets = [
@@ -647,6 +718,27 @@ in
     };
   };
 
+  # -- qBittorrent speed textfile collector --
+  systemd.services.qbittorrent-collector = {
+    description = "Collect qBittorrent transfer metrics for Prometheus";
+    after = [
+      "network.target"
+      "qbittorrent.service"
+    ];
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = lib.getExe qbittorrentCollector;
+    };
+  };
+
+  systemd.timers.qbittorrent-collector = {
+    wantedBy = [ "timers.target" ];
+    timerConfig = {
+      OnCalendar = "*:*:0/15";
+      RandomizedDelaySec = "3s";
+    };
+  };
+
   systemd.tmpfiles.rules = [
     "d ${textfileDir} 0755 root root -"
   ];