feat(jellyfin): add logrotate instead of reducing log level (#11326)

frontend/public/json/jellyfin.json

@@ -43,6 +43,10 @@
     {
       "text": "For NVIDIA graphics cards, you'll need to install the same drivers in the container that you did on the host. In the container, run the driver installation script and add the CLI arg --no-kernel-module",
       "type": "info"
+    },
+    {
+      "text": "Log rotation is configured in /etc/logrotate.d/jellyfin. To reduce verbosity, change MinimumLevel in /etc/jellyfin/logging.json to Warning or Error (disables fail2ban auth logging).",
+      "type": "info"
     }
   ]
 }

install/jellyfin-install.sh

@@ -39,8 +39,19 @@ EOF
 
 $STD apt update
 $STD apt install -y jellyfin
-sed -i 's/"MinimumLevel": "Information"/"MinimumLevel": "Error"/g' /etc/jellyfin/logging.json
+# Configure log rotation to prevent disk fill (keeps fail2ban compatibility) (PR: #1690 / Issue: #11224)
-
+cat <<EOF >/etc/logrotate.d/jellyfin
+/var/log/jellyfin/*.log {
+    daily
+    rotate 3
+    maxsize 100M
+    missingok
+    notifempty
+    compress
+    delaycompress
+    copytruncate
+}
+EOF
 chown -R jellyfin:adm /etc/jellyfin
 sleep 10
 systemctl restart jellyfin