MongoDB Backup Script with Node.js

This project provides a Node.js script to backup your MongoDB database to a .gzip file daily using node-cron.

Prerequisites

Node.js and npm installed on your machine.
MongoDB Database Tools installed. MongoDB Database Tools download page (specifically mongodump and mongorestore).
A MongoDB Atlas cluster or any MongoDB instance.

Installation

Clone the repository:

git clone https://github.com/mian-ali/mongodb_dump_nodejs.git
cd mongodb_dump_nodejs

Install the required packages:
```
npm install
```

Configuration

Update backup.js with your MongoDB details:

const { spawn } = require('child_process');
const path = require('path');
const cron = require('node-cron');

const DB_NAME = '<DB_NAME>'; // Replace with your database name
const ARCHIVE_PATH = path.join(__dirname, 'backup', `${DB_NAME}.gzip`);
const MONGO_URI = '<Atlas Cluster URI>'; // Replace with your MongoDB connection string

// Scheduling the backup every day at midnight
cron.schedule('0 0 * * *', () => backupMongoDB());

function backupMongoDB() {
  const child = spawn('mongodump', [
    `--uri=${MONGO_URI}`,
    `--archive=${ARCHIVE_PATH}`,
    '--gzip',
  ]);

  child.stdout.on('data', (data) => {
    console.log('stdout:\n', data.toString());
  });
  child.stderr.on('data', (data) => {
    console.log('stderr:\n', data.toString());
  });
  child.on('error', (error) => {
    console.log('error:\n', error);
  });
  child.on('exit', (code, signal) => {
    if (code) console.log('Process exit with code:', code);
    else if (signal) console.log('Process killed with signal:', signal);
    else console.log('Backup is successful 🎉');
  });
}

Running the Backup Script

Start the script using nodemon:
```
npm run dev
```
This will start the backup.js script and schedule a backup of your MongoDB database daily at midnight.

Restoring the Backup

To restore the MongoDB backup from the .gzip file, use the following steps:

Ensure MongoDB tools are installed:

Make sure you have mongorestore available on your machine.
Run the mongorestore command:
```
mongorestore --gzip --archive=path/to/your/backup/chat-app.gzip --nsFrom="chat-app.*" --nsTo="new-chat-app.*" --uri="mongodb+srv://<cred>@<your connection string>/chat-app"
```
Replace path/to/your/backup/chat-app.gzip with the actual path to your backup file, and new-chat-app with the database name where you want to restore the data.

Project Structure

mongodb_dump_nodejs/
|── backup
├── backup.js
├── package.json
└── README.md