Configuring Elastic file System (EFS)

Amazon EFS provide elastic file system for your EC2 instance, its storage capacity grow and shrink based on your requirement. EFS is  very easy to create and mount to your instance. Login to your AWS Managment Console and select Elastic file system dashboard. Click on  Create File System button.

                   

                                                                    

                                                               Then select your VPC  name from VPC option. Only instance in the selected  VPC can access the File system.You can create mount target for all of your availability zone , so that instance in specified availability zone can access the File system. . Create a mount target to the specified subnet in your availability zone in next step.

         

                                                          In next step, you can add a tag and select a performance mode. Its optional you can also go with default one.

                  

                                In next step you can review your EFS configuration and confirm to create a new EFS .

Now we need to install nfs client in your EC2 Instance.I am using debian flavour Instance.

      

After installing nfs client ,create a folder to which EFS file system you need to be attached.I had created a folder web_content

Now type the following command to automatically look your instance availability zone and attach the EFS using dns name for that availablity zone. Provide File system id and instance folder path to below command

 sudo mount -t nfs4 -o nfsvers=4.1 $(curl -s http://169.254.169.254/latest/meta-data/placement/availability-zone).<filesystemid>.efs.us-east-1.amazonaws.com:/ <folderpath>