How to Install MongoDB 8 on CentOS Stream 9

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MongoDB is a popular NoSQL database that stores data as JSON-like documents.
It allows fast, scalable, and flexible data management, supports replication and sharding,
and uses the MongoDB Query Language (MQL) for access.

Add MongoDB Repository

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Before installing MongoDB, manually add its repository because it is not available in the default CentOS Stream 9 repository.

Create a repository file:

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

Add the following lines and save the file:

[mongodb-org-8.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/redhat/9/mongodb-org/8.0/x86_64/
gpgcheck=1
enabled=1
gpgkey=https://pgp.mongodb.com/server-8.0.asc

Install MongoDB

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dnf clean all
dnf makecache
dnf install -y mongodb-org

Start and Enable MongoDB Service

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systemctl start mongod
systemctl enable mongod

Verify MongoDB is running:

systemctl status mongod

Output:

● mongod.service - MongoDB Database Server
   Loaded: loaded (/usr/lib/systemd/system/mongod.service; enabled; vendor pres>
   Active: active (running) since Sat 2025-09-14 21:05:10 UTC; 20s ago
     Docs: https://docs.mongodb.org/manual
 Main PID: 11025 (mongod)
   Memory: 99.0M
   CGroup: /system.slice/mongod.service
           └─11025 /usr/bin/mongod -f /etc/mongod.conf

Access MongoDB Shell

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mongosh

First-time output:

Current Mongosh Log ID: 88d7c4f09e3f12b6dd5a4e21
Connecting to:          mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.5.8
Using MongoDB:          8.0.13
Using Mongosh:          2.5.8

For mongosh info see: https://www.mongodb.com/docs/mongodb-shell/

To help improve our products, anonymous usage data is collected and sent to MongoDB periodically (https://www.mongodb.com/legal/privacy-policy).
You can opt-out by running the disableTelemetry() command.

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   The server generated these startup warnings when booting
   2025-09-14T21:05:10.728+00:00: Using the XFS filesystem is strongly recommended with the WiredTiger storage engine. See http://dochub.mongodb.org/core/prodnotes-filesystem
   2025-09-14T21:05:12.613+00:00: Access control is not enabled for the database. Read and write access to data and configuration is unrestricted
   2025-09-14T21:05:12.614+00:00: vm.max_map_count is too low
   2025-09-14T21:05:12.614+00:00: We suggest setting swappiness to 0 or 1, as swapping can cause performance problems.
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test>

Create MongoDB Admin User

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Switch to the admin database:

> use admin

Create an admin user (replace placeholders with your values):

admin> db.createUser(
...  {
...    user: "Enter-A-user-Here",
...    pwd: "Enter-A-Password-Here",
...    roles: [ { role: "root", db: "admin" } ]
...  }
...  )

List MongoDB users:

> show users

Output:

admin> test> use admin
... switched to db admin
... admin> db.createUser(
... ...  {
... ...    user: "Enter-A-user-Here",
... ...    pwd: "Enter-A-Password-Here",
... ...    roles: [ { role: "root", db: "admin" } ]
... ...  }
... ...  )
... { ok: 1 }

Enable Authentication in MongoDB

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Edit the configuration file:

vi /etc/mongod.conf

Find the #security: section and update as follows:

security:
  authorization: enabled

Restart MongoDB:

systemctl restart mongod

Test without authentication:

> show users

You will get:

MongoServerError: command usersInfo requires authentication

Authenticate using the admin user:

> db.auth('Enter-A-user-Here', 'Enter-A-Password-Here')

Once authenticated, you can run any command securely.

Exit MongoDB shell:

> exit

(Optional) Allow MongoDB in Firewall

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If you are accessing MongoDB remotely, open port 27017:

firewall-cmd --zone=public --add-port=27017/tcp --permanent
firewall-cmd --reload

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This concludes the installation and configuration of MongoDB 8 on CentOS Stream 9.