Fargate Task Storage

For Fargate tasks, the following storage types are supported:

• Amazon EFS volumes for persistent storage. For more information, see Amazon EFS Volumes.

• Ephemeral storage for nonpersistent storage.

When provisioned, each Amazon ECS task on Fargate receives the following ephemeral storage. The ephemeral storage configuration depends on which platform version the task is using. After a Fargate task stops, the ephemeral storage is deleted. For more information about Amazon ECS default service limits, see Amazon ECS Service Quotas.

Fargate tasks using platform version 1.4.0 or later

All Amazon ECS on Fargate tasks using platform version 1.4.0 or later receive 20 GB of ephemeral storage.

For tasks using platform version 1.4.0 or later that are launched on May 28, 2020 or later, the ephemeral storage is encrypted with an AES-256 encryption algorithm using an AWS Fargate-managed encryption key.

Fargate tasks using platform version 1.3.0 or earlier

For Amazon ECS on Fargate tasks using platform version 1.3.0 or earlier, each task receives the following ephemeral storage.

• 10 GB of Docker layer storage

• An additional 4 GB for volume mounts. This can be mounted and shared among containers using the volumes, mountPoints and volumesFrom parameters in the task definition.

  Note

  The host and sourcePath parameters are not supported for Fargate tasks.

Example task definition

To provide nonpersistent empty storage for containers in a Fargate task

In this example, you have two application containers that need to access the same scratch file storage location.

1. In the task definition volumes section, define a volume with the name application_scratch.

     "volumes": [
       {
         "name": "application_scratch",
         "host": {}
       }
     ]

2. In the containerDefinitions section, create the application container definitions so they mount the nonpersistent storage.

     "containerDefinitions": [
       {
         "name": "application1",
         "image": "my-repo/application",
         "cpu": 100,
         "memory": 100,
         "essential": true,
         "mountPoints": [
           {
             "sourceVolume": "application_scratch",
             "containerPath": "/var/scratch"
           }
         ]
       },
       {
         "name": "application2",
         "image": "my-repo/application",
         "cpu": 100,
         "memory": 100,
         "essential": true,
         "mountPoints": [
           {
             "sourceVolume": "application_scratch",
             "containerPath": "/var/scratch"
           }
         ]
       }
     ]