Introduction

Fill the disk of an ECS task with random data.

Details

This attack will run the AWSFIS-Run-Disk-Fill SSM Document on the target ECS task using the SSM agent.

Use Cases

Test the behavior of the ECS task when the ephemeral storage is full.

• Applications using the ephemeral storage for caching or temporary storage might fail.
• Does the application recover from the full disk?
• Is your alerting properly configured?

Prerequisites

• The ECS task must have the SSM agent installed and running.
• The ECS task must use the Linux runtime platform
• The ECS task must not have the execute-command feature enabled

Rollback

The issued SSM command running on the SSM agent will be cancelled and the disk space will be freed.

Parameters

Parameter	Description	Default
Fill Percentage	How many the percent of the allocated disk space dependent on the total available size shall be filled?	100%
Duration	How long should the disk be filled?	30s