Hetzner-Traffic-Manager

This script monitors the outgoing traffic of a Hetzner Cloud server. If the outgoing traffic exceeds a set limit, the server will be shut down. It uses the Hetzner Cloud API.

Prerequisites

1. Hetzner Cloud API Token: You need an API token from your Hetzner Cloud account. You can generate one from Hetzner Cloud Console (Guide).
2. jq: A command-line JSON processor used to parse API responses.

Installation

1. Install the necessary packages, if not already done:

   sudo apt update -y
   sudo apt-get install jq -y

2. Download the script:

   wget https://raw.githubusercontent.com/JanisPlayer/Hetzner-Traffic-Manager/refs/heads/main/hetzner_traffic_manager.sh
   sudo chmod 700 ./hetzner_traffic_manager.sh
   sudo chown -R root:root ./hetzner_traffic_manager.sh

3. Configure the script

• Open hetzner_traffic_manager.sh and add your Hetzner API token and server ID in the configuration section:

  API_TOKEN="your-api-token"        # Your Hetzner Cloud API token
  SERVER_ID="your-server-id"        # The ID of the server to monitor
  LIMIT_TB_OFFSET=-1                # Adjusts the included traffic down (-1) or up (+1) in TB

Usage

1. Run the script to test:

   After adjusting the configuration, you can run the script directly to test it:

   /root/hetzner_traffic_manager.sh

2. Automate with Cron:

   You can run the script regularly using Cron. Add it to your Crontab:

   sudo crontab -e

   Example: Run every minute:

   * * * * * /root/hetzner_traffic_manager.sh

   Alternative way to add via a temporary file:

   crontab -u root -l > /tmp/tmp_crontab && echo "* * * * * /root/hetzner_traffic_manager.sh" >> /tmp/tmp_crontab
   crontab -u root /tmp/tmp_crontab && rm /tmp/tmp_crontab
   

Possible Improvements:

• Manage multiple servers returned by the API query and match them based on their IDs.
• Apply the offset limit for each server individually, allowing for more flexible traffic monitoring across multiple servers.
• Better handling of API errors.