How to Install MongoDB in CentOS 8

Introduction

MongoDB is a source-available cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and licensed under the Server Side Public License (SSPL).

MongoDB is a popular document-based and general-purpose NoSQL database engine that stores data in JSON format.

In this tutorial, you will learn how to install MongoDB on CentOS 8.

Install MongoDB

Just follow the steps below

• Add MongoDB Repository

vim /etc/yum.repos.d/mongodb.repo

• Then add the following:

[mongodb-org-5]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/$releasever/mongodb-org/development/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://www.mongodb.org/static/pgp/server-4.2.asc

• The next step will be to install MongoDB using the command below:
  

dnf install mongodb-org

• Start and enable MongoDB

systemctl start mongod
systemctl enable mongod

• Check status of MongoDB

systemctl status mongod

• Confirm that Mongod service is listening.

netstat -ntlpu
OR
netstat -ntlpu | grep -i mongo

• Access MongoDB Shell with the below command

mongo

Output:

• Create a MongoDB Admin User
• switch to the database admin

> use admin

• Then create a new MongoDB user by running the code below

> db.createUser(
{
user: "mongod_admin",
pwd: "unixcop@Password",
roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
}
)

The output  should be as shown below:

• List MongoDB users with:

> show users

• Configure the authentication for MongoDB, because all users can access the shell and execute any commands, which is not recommended at all for security purposes. 
• To enable authentication open the /lib/systemd/system/mongod.service file.

vim /lib/systemd/system/mongod.service

• Then edit the Environment parameter as shown.

Environment="OPTIONS= --auth -f /etc/mongod.conf"

• Reload the system and restart MongoDB.

systemctl daemon-reload
systemctl restart mongod

• Again, Access the mongoDB shell with:

mongo

• Then list users after switching to admin user, just type:

> use admin
> show users

You should get an error as shown.

• To authenticate, simply pass the credentials as shown.

> db.auth('mongod_admin', 'unixcop@Password')

• List users again

> show users

• To exit the database engine run:

> exit

Conclusion

That’s it…

In this guide, we showed you how to install MongoDB on CentOS 8.