Dockerfile

@@ -1,5 +1,10 @@
 FROM mcr.microsoft.com/powershell
 
+ENV SCHEDULE=60 
+ENV GLUETUNFORWARDEDPORTFILE="/tmp/forwarded_port"
+
+VOLUME /tmp
+
 WORKDIR /data
 ADD ["Start-QBTGluetunPortMgr.ps1", "/data/"]
 

Start-QBTGluetunPortMgr.ps1

@@ -0,0 +1,50 @@
+[int] $schedule = $ENV:SCHEDULE
+[string] $gluetunForwardedPortFile = $ENV:GLUETUNFORWARDEDPORTFILE
+[string] $qbtHost = $ENV:QBTHOST
+[string] $qbtPort = $ENV:QBTPORT
+[string] $qbtUser = $ENV:QBTUSER
+[string] $qbtPassword = $ENV:QBTPASSWORD
+[string] $notificationWebhookURL = $ENV:NOTIFICATIONWEBHOOKURL
+
+while ($true)
+{
+    $gluetunForwardedPort = Get-Content $gluetunForwardedPortFile
+    Write-Host "Current forwarded port: $gluetunForwardedPort"
+    
+    $qbtHeaders = @{
+        Referer = "http://$($qbtHost):$($qbtPort)"
+    }
+    $qbtBody = @{
+        username = $qbtUser
+        password = $qbtPassword
+    }
+    $qbtSession = [Microsoft.PowerShell.Commands.WebRequestSession]::new()
+    $qbtResponse = Invoke-WebRequest -Uri "http://$($qbtHost):$($qbtPort)/api/v2/auth/login" -WebSession $qbtSession -Method POST -Headers $qbtHeaders -Body $qbtBody
+    
+    $qbtQueryResponse = Invoke-WebRequest -Uri "http://$($qbtHost):$($qbtPort)/api/v2/app/preferences" -WebSession $qbtSession -Method GET
+    $qbtListenPort = (ConvertFrom-Json $qbtQueryResponse.Content).listen_port
+    Write-Host "Current QBT Listening port: $qbtListenPort"
+
+    if ($gluetunForwardedPort -eq $qbtListenPort)
+    {
+        Write-Host "Ports match!"
+    }
+    else
+    {
+        $qbtPortChangeBody = 'json={"listen_port":' + $gluetunForwardedPort + '}'
+        $qbtPortChangeResponse = Invoke-WebRequest -Uri "http://$($qbtHost):$($qbtPort)/api/v2/app/setPreferences" -WebSession $qbtSession -Method POST -Headers $qbtHeaders -Body $qbtPortChangeBody
+        if ($notificationWebhookURL)
+        {
+            $headers = @{
+                "Content-Type"="application/json"
+            }
+            $body = @{
+                content="QBitTorrent Listening Port updated to $gluetunForwardedPort"
+            }
+            $json = $body | ConvertTo-Json
+            Invoke-WebRequest -URI $notificationWebhookURL -Method post -Body $json -Headers $headers
+        }
+    }
+    Write-Host "Sleeping for $schedule minutes..."
+    Start-Sleep ($schedule * 60)
+}

docker-compose.yaml

@@ -0,0 +1,15 @@
+# SAMPLE DOCKER COMPOSE
+services:
+  qbt-gluetun-portmgr:
+    container_name: qbt-gluetun-portmgr
+    image: docker.io/blinkfink182/qbt-gluetun-portmgr
+    environment:
+      - SCHEDULE=15 # OPTIONAL: time in minutes to wait between check, 60 is default
+      # BELOW ARE ALL REQUIRED
+      - QBTHOST=host.docker.internal # qbittorrent host
+      - QBTPORT=8787 # qbittorrent port
+      - QBTUSER=admin # qbittorrent webUI username
+      - QBTPASSWORD=adminpass # qbittorrent webUI password
+      - NOTIFICATIONWEBHOOKURL=https://discord.com/api/webhooks/<webhookURL> # discord notification wehook URL
+    volumes:
+      - C:/Docker/qbittorrent/gluetun/tmp:/tmp # REQUIRED: Path to where the 'forwarded_port' file from gluetun is stored