Can The Size Of The Root Disk Be Increased In AWS EC2 To Use Along With Elastic Beanstalk?

Yes, it can be done. Using the given extension below:

Resources:

    AWSEBAutoScalingLaunchConfiguration:

        Type: AWS::AutoScaling::LaunchConfiguration

        Properties:

            BlockDeviceMappings:

               - DeviceName: /dev/sda1

                 Ebs:

                     VolumeSize:

                        15

 

The above-mentioned snippet must be added to the app source which you are using in a file at path .ebextensions/01-change-root-volume-size.config. Your file can be named according to your convenience but it should be in .ebextensionsdirectory and must have .config suffix. Updating the environment with the mentioned new app source will terminate work and start a new one with the desired size.