Task metadata available for Amazon ECS tasks on EC2 - Amazon Elastic Container Service

Task metadata available for Amazon ECS tasks on EC2

The Amazon ECS container agent provides a method to retrieve various task metadata and Docker stats. This is referred to as the task metadata endpoint. The following versions are available:

  • Task metadata endpoint version 4 – Provides a variety of metadata and Docker stats to containers. Can also provide network rate data. Available for Amazon ECS tasks launched on Amazon EC2 Linux instances running at least version 1.39.0 of the Amazon ECS container agent. For Amazon EC2 Windows instances that use awsvpc network mode, the Amazon ECS container agent must be at least version 1.54.0. For more information, see Amazon ECS task metadata endpoint version 4.

  • Task metadata endpoint version 3 – Provides a variety of metadata and Docker stats to containers. Available for Amazon ECS tasks launched on Amazon EC2 Linux instances running at least version 1.21.0 of the Amazon ECS container agent. For Amazon EC2 Windows instances that use awsvpc network mode, the Amazon ECS container agent must be at least version 1.54.0. For more information, see Amazon ECS task metadata endpoint version 3.

  • Task metadata endpoint version 2 – Available for Amazon ECS tasks launched on Amazon EC2 Linux instances running at least version 1.17.0 of the Amazon ECS container agent. For Amazon EC2 Windows instances that use awsvpc network mode, the Amazon ECS container agent must be at least version 1.54.0. For more information, see Amazon ECS task metadata endpoint version 2.

If your Amazon ECS task is hosted on Amazon EC2, you can also access task host metadata using the Instance Metadata Service (IMDS) endpoint. The following command, when run from within the instance hosting the task, lists the ID of the host instance. 

 curl http://169.254.169.254/latest/meta-data/instance-id

The information you can obtain from the endpoint is divided into categories such as instance-id. For more information on the different categories of host instance metadata you can obtain using the endpoint, see Instance metadata categories .