Master-Worker Connection Manager Tutorial

This tutorial will guide you through setting up and using the Master-Worker Connection Manager system.

Prerequisites

• Python 3.x installed on all machines (master and workers)
• Network connectivity between the master and worker machines

Setup

1. Ensure all necessary files are in place:

   • connection_manager.py (contains the MasterManager class)
   • Any additional dependencies

2. Install required Python packages:

   pip install socket threading sqlite3
   

Usage

Starting the Master Server

1. Create a Python script (e.g., run_master.py) with the following content:

   from connection_manager import MasterManager
   
   master = MasterManager()
   master.start_master_server(ip_address='0.0.0.0', port=5000, authorized_workers=['192.168.1.100', '192.168.1.101'])
   

2. Run the master server:

   python run_master.py
   

   This will start the master server on all available network interfaces (0.0.0.0) on port 5000.

Connecting Workers

1. Ensure workers have the necessary client-side code to connect to the master.

2. Workers should send their local IP addresses to the master upon connection.

3. Only authorized workers (as specified in authorized_workers list) will be allowed to connect.

Features

• Authorization: The master server authorizes workers based on their IP addresses.
• Multi-threading: The server can handle multiple worker connections simultaneously.
• SQLite Database: Client IDs and specifications are stored in an SQLite database.

Troubleshooting

• If connections fail, check firewall settings and ensure the correct IP addresses and ports are being used.
• Verify that all workers' IP addresses are correctly listed in the authorized_workers list.

Extending the System

To add more functionality:

1. Modify the MasterManager class in connection_manager.py.
2. Implement additional methods for task distribution, result collection, etc.
3. Update the client-side code on workers to handle new features.

For more detailed information, refer to the comments in the connection_manager.py file.