# Database Backup Service

A Node.js application that continuously runs and creates backups of an MSSQL database, then uploads them to Amazon S3.

## Features

- Automatically backs up MSSQL database using T-SQL backup commands
- Uploads backup files to Amazon S3
- Runs continuously with scheduled backups
- Configurable backup interval

## Prerequisites

- Node.js (v14 or higher recommended)
- Access to an MSSQL database server
- AWS S3 bucket and credentials

## Setup

1. Clone this repository
2. Install dependencies:
   ```bash
   npm install
   ```

3. Configure environment variables:
   Copy the `.env.example` file to `.env` and fill in your credentials:
   ```bash
   cp .env.example .env
   ```
   
   Then edit the `.env` file with your actual credentials:
   - AWS_ACCESS_KEY_ID: Your AWS access key ID
   - AWS_SECRET_ACCESS_KEY: Your AWS secret access key
   - AWS_REGION: Your AWS region (e.g., us-east-1)
   - S3_BUCKET_NAME: Your S3 bucket name
- MSSQL_SERVER: Your MSSQL server address
- MSSQL_PORT: Your MSSQL server port (default: 1433)
- MSSQL_USER: Your MSSQL username
- MSSQL_PASSWORD: Your MSSQL password
- MSSQL_DATABASE: Your database name (default: eazybusiness)
- BACKUP_FILE_PATH: Path where backup file is created on MSSQL server (default: F:\ez.bak)
- SMB_ADDRESS: Your SMB share address (e.g., //server/share)
- SMB_USERNAME: Your SMB username
- SMB_PASSWORD: Your SMB password
- SMB_DOMAIN: Your SMB domain (optional)
- SMB_LOCAL_DOWNLOAD_PATH: Local path to download backup files (default: ./downloads)

## Running the Application

Start the backup service:
```bash
npm start
```

For development with auto-restart:
```bash
npm run dev
```

## How It Works

1. The application connects to your MSSQL database using the provided credentials
2. It executes a T-SQL backup command to create a backup file on the MSSQL server
3. The backup file is downloaded from the SMB share to a local directory
4. The local backup file is then uploaded to your specified S3 bucket
5. This process repeats every 24 hours (configurable in the code)

## Configuration

The backup interval can be adjusted in `index.js` by modifying the `setInterval` parameter:
```javascript
// Currently set to 24 hours (86400000 milliseconds)
setInterval(runBackupProcess, 86400000);
```

## File Path Note

The backup file is created on the MSSQL server at the path specified by BACKUP_FILE_PATH environment variable (default: F:\ez.bak). Make sure this path is accessible on your MSSQL server and has appropriate permissions.