How to Install MongoDB on CentOS 9: A Step-by-Step Guide

Are you ready to supercharge your database management with MongoDB? If you’re running CentOS 9 on your VPS or dedicated server, you’ve come to the right place! In this article, we’ll guide you through the process of installing MongoDB on CentOS 9, whether you're a seasoned IT professional or just diving into the world of database management. From updating your system to configuring MongoDB, we'll walk you through each step to get MongoDB up and running smoothly.

What is MongoDB?

MongoDB is a powerful, open-source, NoSQL database management system that stores data in a flexible, JSON-like format. Unlike traditional relational databases that rely on tables, MongoDB stores data in documents, making it more adaptable and scalable. It’s perfect for handling large volumes of unstructured data and supports various industries, from gaming to data analytics.

Key Features of MongoDB:

Document-Oriented Storage: MongoDB stores data in BSON (Binary JSON) format, making it ideal for applications with rapidly evolving data structures.
High Availability: Thanks to replication and automated failover, MongoDB ensures your data is always available.
Scalability: MongoDB can easily scale horizontally by distributing data across multiple servers.

What is CentOS 9?

CentOS 9, a community-driven Linux distribution, is built from the Red Hat Enterprise Linux (RHEL) source code. It’s known for its stability and robust performance, making it a popular choice for enterprise-level systems, web hosting, and development environments. If you’re using CentOS 9 for your VPS or dedicated server, you’re working with a solid foundation that supports various database technologies, including MongoDB.

What is a VPS?

A Virtual Private Server (VPS) is a virtualized server that runs its own operating system. It is isolated from other virtual servers, giving you more control and flexibility compared to shared hosting. With a VPS, you can install and configure software (like MongoDB) without worrying about other users on the same machine. This makes it a great choice for businesses or developers who need more resources and customization options.

Why Install MongoDB on CentOS 9?

You may be wondering, “Why MongoDB?” Well, if you're working with large, unstructured datasets, MongoDB is a perfect fit. It’s flexible, scalable, and performs well under heavy loads. Here are some reasons why you should consider MongoDB for your CentOS 9 server:

Benefits of MongoDB

Document-Oriented Database: MongoDB stores data in documents, making it easier to work with complex data models.
Flexible Query Model: MongoDB allows for powerful queries, including the use of regular expressions, range queries, and more.
Load Balancing and Replication: MongoDB supports sharding and replica sets, helping to balance loads and ensure high availability.

System Requirements

Before jumping into the installation, ensure your server meets these requirements:

A CentOS 9 VPS or dedicated server
Root or sudo privileges
A fresh OS installation (recommended to avoid potential issues)

Step 1: Update Your CentOS 9 System

Let’s kick off the process by updating your CentOS system. This is crucial to ensure all the packages are up to date and your system runs smoothly.

Open your terminal and run:

bash

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yum update -y

To avoid compatibility issues, update the crypto policies:

bash

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update-crypto-policies --set LEGACY

If the update-crypto-policies command isn’t available, install it using:

bash

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yum -y install crypto-policies-scripts

Reboot your server to apply the changes:

bash

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reboot

Step 2: Create the MongoDB Repo File

To install MongoDB, you’ll need to add the official MongoDB repository to your CentOS 9 system.

Create the repo file for MongoDB:

bash

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vi /etc/yum.repos.d/mongodb-org-6.0.repo

In the editor, press i to start editing and add the following content:

makefile

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[mongodb-org-6.0]

name=MongoDB Repository

baseurl=https://repo.mongodb.org/yum/redhat/8/mongodb-org/6.0/x86_64/

gpgcheck=1

enabled=1

gpgkey=https://www.mongodb.org/static/pgp/server-6.0.asc

Press ESC, type :x to save, and quit.

Alternatively, you can use a single command to create the file:

bash

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cat > /etc/yum.repos.d/mongodb-org-6.0.repo << EOF

[mongodb-org-6.0]

name=MongoDB Repository

baseurl=https://repo.mongodb.org/yum/redhat/8/mongodb-org/6.0/x86_64/

gpgcheck=1

enabled=1

gpgkey=https://www.mongodb.org/static/pgp/server-6.0.asc

EOF

Step 3: Install MongoDB 6

Now that the repository is added, let’s install MongoDB 6 on your CentOS 9 server.

Install MongoDB using the following command:

bash

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yum install mongodb-org -y

Once installed, start the MongoDB service:

bash

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systemctl start mongod

Check if MongoDB is running with:

bash

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systemctl status mongod

To verify which port MongoDB is listening on, use:

bash

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ss -ntlp | grep mongo

To enable MongoDB to start automatically on boot, run:

bash

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systemctl enable mongod

And that’s it! MongoDB is now installed on your CentOS 9 VPS or dedicated server.

Troubleshooting MongoDB Installation

While installing MongoDB is usually straightforward, you might encounter some issues. Here are a few things to check:

Firewall Configuration: Ensure that your firewall allows traffic on MongoDB’s default port (27017).
Service Not Starting: If MongoDB fails to start, check the logs in /var/log/mongodb/mongod.log for more details.

Conclusion

MongoDB is a fantastic NoSQL database management system that’s easy to install and configure on CentOS 9. With its flexibility, scalability, and ease of use, it’s a powerful choice for modern applications. Whether you’re working with large datasets or building an application that demands high availability, MongoDB has got you covered.

By following the steps in this guide, you should now have MongoDB up and running on your CentOS 9 server. So, what are you waiting for? Start building your database-driven applications with MongoDB today!

FAQs

1. What is MongoDB used for?

MongoDB is commonly used for applications requiring flexible data storage, such as content management systems, big data analytics, and real-time web apps.

2. What’s the difference between MongoDB and MySQL?

MongoDB is a NoSQL database that stores data in documents, while MySQL is a relational database that uses tables. MongoDB is more flexible and scales better for modern applications.

3. Do I need root privileges to install MongoDB on CentOS 9?

Yes, you need root or sudo privileges to install and configure MongoDB on CentOS 9.

4. How do I check if MongoDB is running on CentOS 9?

You can check the status of MongoDB with:

bash

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systemctl status mongod

5. Can I install MongoDB on CentOS 7?

Yes, the installation process is similar for CentOS 7. However, it’s recommended to use CentOS 9 for better support and performance.

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