MongoDB Replication Management Script

This script is designed to manage MongoDB replication settings across different platforms including Ubuntu/Linux, macOS, and Windows. It allows you to enable or disable replication by modifying the MongoDB configuration file and restarting the MongoDB service as required.

Features

• Cross-platform support: Works on Ubuntu/Linux, macOS, and Windows.
• Automatically loads predefined environment variables from a .env file.
• Makes a backup of the original MongoDB configuration file before making any changes.
• Restarts the MongoDB service to apply replication changes.
• Initiates the MongoDB replica set when enabling replication.

Requirements

• MongoDB installed and configured on your system.
• Git Bash (for Windows users), WSL, or Cygwin to run the script.
• A .env file with the required variables.

.env File Configuration

Create a .env file in the same directory as the script with the following content:

MONGO_DB_CONFIG_FILE_PATH="C:/path/to/your/mongod.conf"  # Windows path format example
REPL_SET_NAME="yourReplicaSetName"

Note: For Unix-based systems (Linux/macOS), provide paths in Unix format.

Usage

1. Clone or download this repository.

2. Prepare the .env file with the appropriate values.

3. Open your preferred terminal (Git Bash for Windows, WSL, or any Unix-based terminal).

4. Navigate to the script's directory.

5. Run the script:

# For enabling replication
./mongo-replication-manager.sh enable

# For disabling replication
./mongo-replication-manager.sh disable

Example (on Windows with Git Bash):

cd /c/Users/YourUsername/path/to/your/script/
./script.sh enable

How It Works

1. The script loads the required environment variables (MONGO_DB_CONFIG_FILE_PATH and REPL_SET_NAME) from the .env file.
2. Depending on the argument passed (enable or disable), the script:
   • Enables replication: Adds the replication section to the MongoDB configuration file and sets the replica set name.
   • Disables replication: Removes the replication section from the configuration file.
3. Restart the MongoDB service to apply changes.
4. If replication is enabled, initiate the replica set using MongoDB commands.

Cross-Platform Considerations

• The script handles file path differences between Unix-based systems and Windows.
• Commands for restarting MongoDB services and managing file backups are designed to work on Linux, macOS, and Windows (using Git Bash, WSL, or Cygwin).

Prerequisites

• Ensure that MongoDB is installed and accessible on your machine.
• Ensure that you have a Unix-like terminal environment set up if running on Windows (such as Git Bash, WSL, or Cygwin).
• Administrator Privileges are required to modify system-level services (like MongoDB) and configuration files.

Troubleshooting

• Permission Denied: Make sure you are running the script with administrative privileges.
• File Path Issues: Ensure paths in the .env file are in the correct format for your environment (Unix vs. Windows paths).
• MongoDB Service Not Restarting: Check that your MongoDB service is named mongod and is configured correctly in your OS’s service manager.

License

This script is distributed under the MIT License. See LICENSE for more information.

Author

Developed by [Tushar]