Amazon ECS task metadata endpoint version 3
Important
The task metadata version 3 endpoint is no longer being actively maintained. We recommend that you update the task metadata version 4 endpoint to get the latest metadata endpoint information. For more information, see Amazon ECS task metadata endpoint version 4.
If you are using Amazon ECS tasks hosted on Amazon Fargate, see Task metadata endpoint version 3 in the Amazon Elastic Container Service User Guide for Amazon Fargate.
Beginning with version 1.21.0 of the Amazon ECS container agent, the agent injects an
environment variable called ECS_CONTAINER_METADATA_URI
into each
container in a task. When you query the task metadata version 3 endpoint, various
task metadata and Docker
statsbridge
network mode, network metrics are available when querying the /stats
endpoints.
The task metadata endpoint version 3 feature is enabled by default for tasks
that use the Fargate launch type on platform version v1.3.0 or
later and tasks that use the EC2 launch type and are launched on
Amazon EC2 Linux infrastructure running at least version 1.21.0 of the Amazon ECS
container agent or on Amazon EC2 Windows infrastructure running at least version
1.54.0
of the Amazon ECS container agent and use awsvpc
network mode. For more information, see Amazon ECS Linux container instance management.
You can add support for this feature on older container instances by updating the agent to the latest version. For more information, see Updating the Amazon ECS container agent.
Important
For tasks using the Fargate launch type and platform versions prior to v1.3.0, the task metadata version 2 endpoint is supported. For more information, see Amazon ECS task metadata endpoint version 2.
Task Metadata endpoint version 3 paths
The following task metadata endpoints are available to containers:
${ECS_CONTAINER_METADATA_URI}
-
This path returns metadata JSON for the container.
${ECS_CONTAINER_METADATA_URI}/task
-
This path returns metadata JSON for the task, including a list of the container IDs and names for all of the containers associated with the task. For more information about the response for this endpoint, see Amazon ECS task metadata v3 JSON response.
${ECS_CONTAINER_METADATA_URI}/taskWithTags
-
This path returns the metadata for the task included in the
/task
endpoint in addition to the task and container instance tags that can be retrieved using theListTagsForResource
API. ${ECS_CONTAINER_METADATA_URI}/stats
-
This path returns Docker stats JSON for the specific Docker container. For more information about each of the returned stats, see ContainerStats
in the Docker API documentation. ${ECS_CONTAINER_METADATA_URI}/task/stats
-
This path returns Docker stats JSON for all of the containers associated with the task. For more information about each of the returned stats, see ContainerStats
in the Docker API documentation.