Install and secure MongoDB® on Ubuntu 24.04 Noble Numbat

database

mysql

mongoDB

UFW

bindIP

Reviewed on January 02, 2025

MongoDB® is a document-oriented database that is free and open-source. It is considered one of the most popular NoSQL database engines because it is scalable, powerful, reliable, and easy to use.

In contrast to relational databases, MongoDB® does not require a deep predefined schema before you can add data since it can be altered at any time. As it uses the NoSQL concept, data rows are stored in JSON-like documents which allows arbitrary data to be inserted.

Before you start

To complete the actions presented below, you must have:

A Scaleway account logged into the console
Owner status or IAM permissions allowing you to perform actions in the intended Organization
An SSH key
An Instance running on Ubuntu 24.O4 or later
sudo privileges or access to the root user

Tip

If you want to set up a MongoDB® Instance without worrying about the upkeep of compute resources, you can create a Managed Databases for MongoDB® Instance. These are powerful Database Instances managed by Scaleway.

Setting up MongoDB

Adding MongoDB® Repository

Important

You should always use the official MongoDB® mongodb-org packages, which are kept up-to-date with the most recent major and minor MongoDB® releases.

Connect to your Instance via SSH.
```
ssh root@your.instance.ip.address
```
Update the Ubuntu package manager (apt) and the Ubuntu packages already installed.
```
apt-get update && apt-get upgrade -y
```
Install gnupg and curl if they are not already available.
```
apt-get install gnupg curl
```
Import the key for the official MongoDB® repository (Ubuntu ensures the authenticity of software packages by verifying that they are signed with GPG keys.).
```
curl -fsSL https://www.mongodb.org/static/pgp/server-8.0.asc | \
sudo gpg -o /usr/share/keyrings/mongodb-server-8.0.gpg \
--dearmor
```

Add the MongoDB® repository details so that Ubuntu's apt command-line tool will know where to download the packages. Execute the following command to create a list file for MongoDB.

echo "deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb-server-8.0.gpg ] https://repo.mongodb.org/apt/ubuntu noble/mongodb-org/8.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-8.0.list

Update the packages list.
```
apt-get update
```

Installing MongoDB

Install the mongodb-org meta-package, which includes the daemon, configuration, and init scripts, shell, and management tools on the server.
```
apt install mongodb-org
```
Press enter or type Y to proceed when prompted. Once the installation is completed, we start the MongoDB® daemon.
```
systemctl start mongod.service
```

Since systemctl does not provide output, verify that the service has started properly.

systemctl status mongod

● mongod.service - MongoDB® Database Server
    Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
    Active: active (running) since Mon 2024-06-17 11:33:47 UTC; 1s ago
    Docs: https://docs.mongodb.org/manual
Main PID: 2569 (mongod)
    Memory: 72.3M
        CPU: 242ms
    CGroup: /system.slice/mongod.service
            └─2569 /usr/bin/mongod --config /etc/mongod.conf

Ensure that it restarts automatically at each boot.

systemctl enable mongod.service

Created symlink from /etc/systemd/system/multi-user.target.wants/mongod.service to /lib/systemd/system/mongod.service.

Securing MongoDB

The default installation of MongoDB® is vulnerable because no authentication is required to interact with the database. Any user could create and destroy databases, as well as read from and write to their contents by default. To secure MongoDB, we need to create an administrative user and enable authentication.

Connect to the Mongo shell to add a new user.
```
mongosh
```
Note
The legacy mongo shell was deprecated in MongoDB® 5.0 and removed in MongoDB® 6.0. The new MongoDB® Shell, mongosh, offers numerous advantages over the legacy shell.
```
Current Mongosh Log ID:	66701f399be3b0bbf2597192
Connecting to:		mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.2.9
Using MongoDB:		7.0.11
Using Mongosh:		2.2.9

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

test>
```
You can choose any preferred name for the administrative user since the privilege level is assigned from the role of userAdminAnyDatabase.

The admin database designates where the credentials are stored. You can learn more about authentication in the MongoDB® Security Authentication section.

Set the username of your choice and be sure to pick a secure password and substitute it in the command below:

use admin
db.createUser(
  {
    user: "AdminOce",
    pwd: "PWD2018AdminOce",
    roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
  }
)

use admin
switched to db admin
> db.createUser(
...   {
...     user: "AdminOce",
...     pwd: "PWD2022AdminOce",
...     roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
...   }
... )
Successfully added user: {
  "user" : "AdminOce",
  "roles" : [
    {
      "role" : "userAdminAnyDatabase",
      "db" : "admin"
    }
  ]
}

Type exit and press ENTER or use CTRL+C to leave the client.
```
> exit
bye
```

Enabling authentication

To enforce authentication, we need to enable authentication and restart the MongoDB® daemon.

Open the configuration file.
```
nano /etc/mongod.conf
```
In the #security section, remove the hash in front of security to enable the section. Then, we add the authorization lines (indented with two spaces) as per the following excerpt below:
```
security:
authorization: "enabled"
```
Restart the daemon.
```
systemctl restart mongod.service
```

Check the status to verify that the service has rebooted.

systemctl status mongod.service

● mongod.service - MongoDB® Database Server
    Loaded: loaded (/lib/systemd/system/mongod.service; disabled; vendor preset: enabled)
    Active: active (running) since Mon 2022-11-21 12:44:17 UTC; 6min ago
      Docs: https://docs.mongodb.org/manual
  Main PID: 2453 (mongod)
    Memory: 67.0M
        CPU: 2.074s
    CGroup: /system.slice/mongod.service
            └─2453 /usr/bin/mongod --config /etc/mongod.conf

Ensure that the daemon restarts automatically at boot.
```
systemctl enable mongod.service
```

Testing authentication

Connect without credentials to verify that our actions are restricted.

mongosh

Current Mongosh Log ID:	66701f399be3b0bbf2597192
Connecting to:		mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.2.9
Using MongoDB:		7.0.11
Using Mongosh:		2.2.9

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

test>

We are connected to the test database.

Test that the access is restricted with the show dbs command:

test> show dbs
MongoServerError: command listDatabases requires authentication

Exit the shell to proceed.
```
> exit
bye
```

Verifying the administrative user's access

Connect as our administrator with the -u option to supply a username and -p to be prompted for a password. Supply the database where we stored the user's authentication credentials with the --authenticationDatabase option.
```
mongosh -u AdminOce -p --authenticationDatabase admin
```

Once the correct password is entered, we are dropped into the shell, where we can issue the show dbs command:

Enter password: ***************
Current Mongosh Log ID:	66701f399be3b0bbf2597192
Connecting to:		mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.2.9
Using MongoDB:		7.0.11
Using Mongosh:		2.2.9

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

test> show dbs
admin   148.00 KiB
config   60.00 KiB
local    72.00 KiB

Type exit or press CTRL+C to exit.

Configuring remote access (optional)

Enabling UFW

Uncomplicated Firewall (UFW), is a front-end to iptables. Its main goal is to make managing your firewall drop-dead simple and to provide an easy-to-use interface.

Note

If UFW is already installed on your computer, go directly to step 5.

Install UFW.
```
apt install ufw
```
Check UFW status.
```
ufw status
```
Enable UFW, as it is probably inactive.
```
ufw enable
```
Ensure to allow SSH.
```
ufw allow OpenSSH
```

Rerun the UFW status command.

ufw status

Status: active

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
OpenSSH (v6)               ALLOW       Anywhere (v6)

Allow access to the default MongoDB® port 27017 but restrict that access to a specific host.
```
ufw allow from client_ip_address to any port 27017
```

Re-run this command using the IP address for each additional client that needs access. To double-check the rule, run ufw status again:

ufw status

To                         Action      From
--                         ------      ----
OpenSSH                    ALLOW       Anywhere
27017                      ALLOW       client_ip_address
OpenSSH (v6)               ALLOW       Anywhere (v6)

Configuring a public bindIP

To allow remote connections, add our host's publically routable IP address to the mongod.conf file.
```
nano /etc/mongod.conf
```
In the net section, add the MongoHost's IP to the bindIp line.

Note
Verify your private IP with the ifconfig command.
```
net:
  port: 27017
  bindIp: 127.0.0.1,IP_of_MongoHost
```
Restart the daemon.
```
systemctl restart mongod.service
```

Check the daemon status.

systemctl status mongod.service

Active: active (running) since Thu 2022-xx-yy 13:15:35 UTC; 5s ago

Testing remote connections

Ensure that Mongo is listening on its public interface by adding the --host flag with the IP address from the mongodb.conf file.

mongo -u AdminOce -p --authenticationDatabase admin --host IP_address_of_MongoHost

Current Mongosh Log ID:	66701f399be3b0bbf2597192
Connecting to:		mongodb://127.0.0.1:27017/?directConnection=true&serverSelectionTimeoutMS=2000&appName=mongosh+2.2.9
Using MongoDB:		7.0.11
Using Mongosh:		2.2.9

Uninstalling MongoDB

Important

This process will completely remove MongoDB, its configuration, and all databases. This process is not reversible, so ensure that all of your configuration and data are backed up before proceeding.

Stop MongoDB.
```
service mongod stop
```
Remove any MongoDB® packages that you had previously installed.
```
apt purge mongodb-org*
```

Remove MongoDB® databases and log files.

rm -r /var/log/mongodb
 rm -r /var/lib/mongodb

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