Installing MongoDB on Ubuntu

MongoDB is an open-source database primarily used in modern web applications.

MongoDB Repository

MongoDB is available in Ubuntu packages, but the official MongoDB repository offers the latest version.

We will add the key for the official MongoDB repository.

sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv EA312927

Next, we will add the details of the repository.

echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.2 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list

Subsequently, we need to update the package list.

sudo apt-get update

Installation of MongoDB

To install the package, follow these steps:

sudo apt-get install -y mongodb-org

The command will download and install several packages, including MongoDB and other tools.

After that, you can start MongoDB.

sudo systemctl start mongod

Now MongoDB is running, and you can verify this using:

sudo systemctl status mongod

But if you restart the server, you will need to manually start MongoDB again.
To enable MongoDB to start automatically at boot, you can use:

sudo systemctl enable mongod

Firewall Configuration

If you have a configured firewall, most likely, you will need to adjust the firewall settings.

In cases where your application is on a different server than MongoDB, you will need to allow connections from that server.
The default port for MongoDB is 27017.

For ufw

sudo ufw allow from ip-server/32 to any port 27017

For iptables

sudo iptables -A INPUT -s ip-server -p tcp --destination-port 27017 -m state --state NEW,ESTABLISHED -j ACCEPT
sudo iptables -A OUTPUT -s ip-server -p tcp --source-port 27017 -m state --state ESTABLISHED -j ACCEPT

Done.