MongoDB Backup to S3 Script

This Bash script backs up a MongoDB database, compresses the backup, and uploads it to an AWS S3 bucket. It's ideal for daily automated backups via cron or manual execution.

📦 Features

• Backs up a MongoDB database
• Supports authentication
• Compresses backup into a .zip file
• Uploads to an AWS S3 bucket
• Cleans up temporary backup files

🧾 Requirements

• bash
• mongodump (from MongoDB Database Tools)
• zip
• aws-cli

Install required tools:

# Ubuntu/Debian
sudo apt install zip awscli

⚙️ Configuration

Edit the script and update the following variables:

MongoDB

MONGO_HOST="localhost"
MONGO_PORT="27017"
DATABASE_NAME="your_database_name"
MONGO_USERNAME="your_username"        # Leave blank if not needed
MONGO_PASSWORD="your_password"
MONGO_SSL=""                          # Add SSL options if needed

AWS S3

S3_BUCKET="your_bucket_name"
S3_BACKUP_FOLDER="db_backup"

AWS Credential

AWS_ACCESS_KEY_ID="your_access_key_id"
AWS_SECRET_ACCESS_KEY="your_secret_access_key"
AWS_REGION="ap-southeast-1"

Local Backup Directory

BACKUP_DIR="/backup"

🏃 Usage

To run the script manually:

bash backup.sh

Or make it executable first:

chmod +x backup.sh
./backup.sh

⏰ Scheduling via Cron

To run the backup daily at 2:00 AM:

crontab -e

Add the line:

0 2 * * * /path/to/backup.sh >> /path/to/backup.log 2>&1

📁 Output

Compressed backup at: /backup/YYYY-MM-DD.zip

Uploaded to: s3://your_bucket_name/db_backup/YYYY-MM-DD.zip

⚠️ Notes

The script assumes mongodump, zip, and aws CLI are available in PATH.

Logs are not stored unless you configure output redirection in cron or run script manually with >> log.txt.