In this tutorial, we will show you how to install MongoDB with authentication on EC2 AMI Linux.

Prerequisites:

• You have an EC2 instance running.
• You have root access to this EC2 instance.

1. Connect to the EC2 Instance Using a PEN/PPK File

For MongoDB 3.0, create the below file using VI or any other editor:

vi /etc/yum.repos.d/mongodb-org-3.0.repo 

Add the content below in the above-created file:

[mongodb-org-3.0]
name=MongoDB Repository
baseurl=https://repo.mongodb.org/yum/amazon/2013.03/mongodb-org/3.0/x86_64/
gpgcheck=0
enabled=1

2. Install MongoDB Using the Below Command

sudo yum install -y mongodb-org

3. Start MongoDB Service Using the Below Command

sudo service mongod start

4. Start MongoDB on Reboot

You can optionally ensure that MongoDB will start following a system reboot by issuing the following command:

sudo chkconfig mongod on

Once the service is started, you need to connect to the Mongo shell for creating a user. To connect to the Mongo shell, use the below command:

mongo

If you find this error when using Mongo command:

Failed global initialization: BadValue Invalid or no user locale set. Please ensure LANG and/or LC_* environment variables are set correctly.

...then add the export below:

export LC_ALL=C

6. Select Admin

Once connected successfully to mongo, select admin

use admin

7. Create User

Create user as per below:

db.createUser(
{
user: "myUserAdmin",
pwd: "abc123",
roles: [ { role: "userAdminAnyDatabase", db: "admin" } ]
}
)

7a. Create user for specific database

To create a user for a particular database, repeat Step 6 with the below command:

use

To create a user for the above database:

db.createUser(
{
user: "",
pwd: "mypassword",
roles: [ { role: "readWrite", db: "muddle" }]
}
)

7b. Edit /etc/mongod.conf 

For Mongo 3.x, add this to the config:

security:
authorization: "enabled"

Then, run the below command:

service mongod restart

8. Connect to MongoDB Remotely (Optional)

If you want to connect to MongoDB remotely, edit the below file with VI or any other editor:

vi /etc/mongod.conf

Add IP in bindIp as seen below and restart the MongoDB service.

bindIp: 127.0.0.1,8.8.8.8

And that's it! You've now installed MongoDB with authentication on EC2 AMI Linux.