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EFS (Elastic File System) In AWS

In this article, we will discuss EFS (Elastic File System) in AWS.

Purpose

EFS provides the network-attached storage in AWS. It means that a shared folder is created using EFS which can be accessed by the EC2 instances as a centralized folder.

Steps

For implementing the EFS, we will work on the following steps: -

Launch 2 Linux EC2 instances
Create a security group for EFS
Create EFS
Create a folder in both EC2 instances
Download and install the EFS utility for Linux
Mount the EFS folder
Test EFS

So, let’s get started.

Launch 2 Linux EC2 Instances

First, launch 2 Linux EC2 instances.

Picture showing the 2 Linux EC2 instances created in AWS console

Click to Enlarge

Create A Security Group For EFS

Create a security group with the following values: -

Type	Value
Type	NFS
Protocol	TCP
Port range	2049
Source	Custom
< security group of EC2 instances >

Picture showing the new security group created for EFS

Click to Enlarge

Create EFS

First, search the word EFS in the search box. Click on the EFS service in the search result.

Picture showing searching EFS in AWS console

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The EFS screen will appear. Click on the Create file system button.

Picture showing the Create file system button for creating EFS

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In the Create file system, click on the Customize button.

Picture showing the customize button while creating the file system

Click to Enlarge

In the first step, enter the Name - optional.

Picture showing the File system settings tab while creating EFS

Click to Enlarge

Scroll down to the Lifecycle management section.

Picture showing the Lifecycle Management section of the File system settings tab while creating EFS

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Click on the Next button to go to step 2. In step 2, select the security group created in the last section.

Picture showing the Network Access tab while creating EFS

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Click on the Next button. In the next screen, you can specify the file system policy.

Picture showing the File system policy tab while creating EFS

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Without changing anything, click on the Next button. The review screen will appear.

Picture showing the Review and create tab while creating EFS

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Scroll down to the bottom to create EFS. The EFS is created.

Picture showing the EFS created in AWS console

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Create A Folder In Both EC2 Instances

Write the following command for creating the folder in both the EC2 instances: -

sudo mkdir EFS

In the above code, EFS is the folder name.

Download And Install The EFS Utility For Linux

For downloading the utility on both EC2 instances, use the following command: -

sudo yum install -y amazon-efs-utils

Mount The EFS Folder

In the previous section, we created a folder EFS in both EC2 instances. To mount the folder, use the following command in both instances: -

sudo mount -t efs fs-010314a8623bf9213 EFS/

In the above command: -

fs-010314a8623bf9213 is the File System Id
EFS/ is the folder name

Test EFS

To test the EFS, create a file inside the EFS folder using the following command: -

sudo touch gyan.txt

You can see the file in both EC2 instances.

Picture showing the file created inside the EFS folder

Click to Enlarge

Picture showing the file created in first ec2 instance also displays in second ec2 instance

Click to Enlarge

Posted By -	Karan Gupta

Posted On -	Wednesday, August 17, 2022

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