mongodb-data-backup/index.js

A Node.js tool to backup MongoDB databases using mongodump

const { exec } = require('child_process');
const fs = require('fs-extra');
const path = require('path');
const moment = require('moment');
const archiver = require('archiver');

/**
 * Backs up a MongoDB database using `mongodump`
 * @param {string} uri - MongoDB connection URI
 * @param {string} outDir - Output directory for backup
 * @param {string} dbName - Optional database name
 * @returns {Promise<string>} - Path to the zip file
 */
async function backupMongoDB(uri, outDir, dbName = '') {
  const timestamp = moment().format('YYYY-MM-DD_HH-mm-ss');
  const dumpDir = path.join(outDir, `mongo_backup_${timestamp}`);
  const zipPath = `${dumpDir}.zip`;

  await fs.ensureDir(outDir);

  const dumpCmd = `mongodump --uri="${uri}" ${dbName ? `--db=${dbName}` : ''} --out="${dumpDir}"`;

  return new Promise((resolve, reject) => {
    exec(dumpCmd, async (error, stdout, stderr) => {
      if (error) {
        return reject(`Backup failed: ${stderr}`);
      }

      // Zip the backup folder
      const output = fs.createWriteStream(zipPath);
      const archive = archiver('zip', { zlib: { level: 9 } });

      output.on('close', () => resolve(zipPath));
      archive.on('error', (err) => reject(err));

      archive.pipe(output);
      archive.directory(dumpDir, false);
      await archive.finalize();
    });
  });
}

module.exports = {
  backupMongoDB,
};