Install MongoDB

Many applications require a database. Here you'll install MongoDB, the "M" in the MEAN stack. It's a popular NoSQL database solution that's free and open source. A NoSQL database doesn't require data to be structured in a pre-defined way as it would with a relational database like SQL Server or MySQL.

MongoDB stores its data in JSON-like documents that don't require rigid data structures. You interact with MongoDB using queries and commands sent using JavaScript Object Notation, or JSON.

What MongoDB editions are available?

MongoDB provides two editions:

• MongoDB Community Server
• MongoDB Enterprise Server

Here you'll install MongoDB Community Server. Later, you'll use MongoDB to store information about books.

How do I install MongoDB?

You can install MongoDB on Linux, macOS, and Windows. For learning purposes, here you'll install MongoDB on Ubuntu using Ubuntu's apt package manager.

The installation process varies depending on your operating system. If you're not familiar with Ubuntu, you can still follow along to get a sense of how things work.

Install MongoDB

Here you'll install MongoDB with just a few commands. You'll work from the SSH connection to the Ubuntu VM that you created in the previous unit.

1. First, we'll make sure all current packages are up to date.

   Bash

   sudo apt update && sudo apt upgrade -y
   

    Note

   The sudo part means that we want to run the command with administrative privileges.

2. Install the MongoDB package.

   Bash

   sudo apt-get install -y mongodb
   

3. Once the installation completes, the service should automatically startup. Let's confirm this by running this command.

   Bash

   sudo systemctl status mongodb
   

   You should see the service running.

   Output

   azureuser@MeanStack:~$ sudo systemctl status mongodb
   ● mongodb.service - An object/document-oriented database
     Loaded: loaded (/lib/systemd/system/mongodb.service; enabled; vendor preset: enabled)
     Active: active (running) since Thu 2019-08-22 16:46:30 UTC; 9s ago
       Docs: man:mongod(1)
   Main PID: 18360 (mongod)
     CGroup: /system.slice/mongodb.service
             └─18360 /usr/bin/mongod --config /etc/mongodb.conf
   
   Aug 22 16:46:30 MeanStack systemd[1]: Started An object/document-oriented database.
   

4. Run mongod --version to verify the installation.

   Bash

   mongod --version