Task metadata endpoint version 4

The Amazon ECS container agent injects an environment variable into each container, referred to as the task metadata endpoint which provides various task metadata and Docker stats to the container.

The task metadata and network rate stats are sent to CloudWatch Container Insights and can be viewed in the AWS Management Console. For more information, see Amazon ECS CloudWatch Container Insights.

Note

Amazon ECS provides earlier versions of the task metadata endpoint. To avoid the need to create new task metadata endpoint versions in the future, additional metadata may be added to the version 4 output. We will not remove any existing metadata or change the metadata field names.

Enabling the task metadata endpoint

The environment variable is injected by default into the containers of Amazon ECS tasks launched on Amazon EC2 Linux instances that are 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 Linux container instance management.

Note

You can add support for this feature on Amazon EC2 instances using older versions of the Amazon ECS container agent by updating the agent to the latest version. For more information, see Updating the Amazon ECS container agent.

Task metadata endpoint version 4 paths

The following task metadata endpoint paths are available to containers.

${ECS_CONTAINER_METADATA_URI_V4}

This path returns metadata for the container.

${ECS_CONTAINER_METADATA_URI_V4}/task

This path returns metadata 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 Task metadata JSON response.

${ECS_CONTAINER_METADATA_URI_V4}/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 the ListTagsForResource API. Any errors received when retrieving the tag metadata will be included in the Errors field in the response.

Note

The Errors field is only in the response for tasks hosted on Amazon EC2 Linux instances running at least version 1.50.0 of the 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

This endpoint requires the ecs.ListTagsForResource permission.

${ECS_CONTAINER_METADATA_URI_V4}/stats

This path returns Docker stats for the specific container. For more information about each of the returned stats, see ContainerStats in the Docker API documentation.

For Amazon ECS tasks that use the awsvpc or bridge network modes hosted on Amazon EC2 Linux instances running at least version 1.43.0 of the container agent, there will be additional network rate stats included in the response. For all other tasks, the response will only include the cumulative network stats.

${ECS_CONTAINER_METADATA_URI_V4}/task/stats

This path returns Docker stats for all of the containers associated with the task. This can be used by sidecar containers to extract network metrics. For more information about each of the returned stats, see ContainerStats in the Docker API documentation.

For Amazon ECS tasks that use the awsvpc or bridge network modes hosted on Amazon EC2 Linux instances running at least version 1.43.0 of the container agent, there will be additional network rate stats included in the response. For all other tasks, the response will only include the cumulative network stats.

Task metadata JSON response

The following information is returned from the task metadata endpoint (${ECS_CONTAINER_METADATA_URI_V4}/task) JSON response. This includes metadata associated with the task in addition to the metadata for each container within the task.

Cluster

The short name of the Amazon ECS cluster to which the task belongs.

ServiceName

The name of the service to which the task belongs. ServiceName will appear for Amazon EC2 and Amazon ECS Anywhere container instances if the task is associated with a service.

Note

The ServiceName metadata is only included when using Amazon ECS container agent version 1.63.1 or later.

VPCID

The VPC ID of the Amazon EC2 container instance. This field only appears for Amazon EC2 instances.

Note

The VPCID metadata is only included when using Amazon ECS container agent version 1.63.1 or later.

TaskARN

The full Amazon Resource Name (ARN) of the task to which the container belongs.

Family

The family of the Amazon ECS task definition for the task.

Revision

The revision of the Amazon ECS task definition for the task.

DesiredStatus

The desired status for the task from Amazon ECS.

KnownStatus

The known status for the task from Amazon ECS.

Limits

The resource limits specified at the task level, such as CPU (expressed in vCPUs) and memory. This parameter is omitted if no resource limits are defined.

PullStartedAt

The timestamp for when the first container image pull began.

PullStoppedAt

The timestamp for when the last container image pull finished.

AvailabilityZone

The Availability Zone the task is in.

Note

The Availability Zone metadata is only available for Fargate tasks using platform version 1.4 or later (Linux) or 1.0.0 (Windows).

LaunchType

The launch type the task is using. When using cluster capacity providers, this indicates whether the task is using Fargate or EC2 infrastructure.

Note

This LaunchType metadata is only included when using Amazon ECS Linux container agent version 1.45.0 or later (Linux) or 1.0.0 or later (Windows).

Containers

A list of container metadata for each container associated with the task.

DockerId

The Docker ID for the container.

When you use Fargate, the id is a 32-digit hex followed by a 10 digit number.

Name

The name of the container as specified in the task definition.

DockerName

The name of the container supplied to Docker. The Amazon ECS container agent generates a unique name for the container to avoid name collisions when multiple copies of the same task definition are run on a single instance.

Image

The image for the container.

ImageID

The SHA-256 digest for the image.

Ports

Any ports exposed for the container. This parameter is omitted if there are no exposed ports.

Labels

Any labels applied to the container. This parameter is omitted if there are no labels applied.

DesiredStatus

The desired status for the container from Amazon ECS.

KnownStatus

The known status for the container from Amazon ECS.

ExitCode

The exit code for the container. This parameter is omitted if the container has not exited.

Limits

The resource limits specified at the container level, such as CPU (expressed in CPU units) and memory. This parameter is omitted if no resource limits are defined.

CreatedAt

The time stamp for when the container was created. This parameter is omitted if the container has not been created yet.

StartedAt

The time stamp for when the container started. This parameter is omitted if the container has not started yet.

FinishedAt

The time stamp for when the container stopped. This parameter is omitted if the container has not stopped yet.

Type

The type of the container. Containers that are specified in your task definition are of type NORMAL. You can ignore other container types, which are used for internal task resource provisioning by the Amazon ECS container agent.

LogDriver

The log driver the container is using.

Note

This LogDriver metadata is only included when using Amazon ECS Linux container agent version 1.45.0 or later.

LogOptions

The log driver options defined for the container.

Note

This LogOptions metadata is only included when using Amazon ECS Linux container agent version 1.45.0 or later.

ContainerARN

The full Amazon Resource Name (ARN) of the container.

Note

This ContainerARN metadata is only included when using Amazon ECS Linux container agent version 1.45.0 or later.

Networks

The network information for the container, such as the network mode and IP address. This parameter is omitted if no network information is defined.

ExecutionStoppedAt

The time stamp for when the tasks DesiredStatus moved to STOPPED. This occurs when an essential container moves to STOPPED.

Examples

The following examples show example outputs from each of the task metadata endpoints.

Example container metadata response

When querying the ${ECS_CONTAINER_METADATA_URI_V4} endpoint you are returned only metadata about the container itself. The following is an example output.

{
    "DockerId": "ea32192c8553fbff06c9340478a2ff089b2bb5646fb718b4ee206641c9086d66",
    "Name": "curl",
    "DockerName": "ecs-curltest-24-curl-cca48e8dcadd97805600",
    "Image": "111122223333.dkr.ecr.us-west-2.amazonaws.com/curltest:latest",
    "ImageID": "sha256:d691691e9652791a60114e67b365688d20d19940dde7c4736ea30e660d8d3553",
    "Labels": {
        "com.amazonaws.ecs.cluster": "default",
        "com.amazonaws.ecs.container-name": "curl",
        "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/8f03e41243824aea923aca126495f665",
        "com.amazonaws.ecs.task-definition-family": "curltest",
        "com.amazonaws.ecs.task-definition-version": "24"
    },
    "DesiredStatus": "RUNNING",
    "KnownStatus": "RUNNING",
    "Limits": {
        "CPU": 10,
        "Memory": 128
    },
    "CreatedAt": "2020-10-02T00:15:07.620912337Z",
    "StartedAt": "2020-10-02T00:15:08.062559351Z",
    "Type": "NORMAL",
    "LogDriver": "awslogs",
    "LogOptions": {
        "awslogs-create-group": "true",
        "awslogs-group": "/ecs/metadata",
        "awslogs-region": "us-west-2",
        "awslogs-stream": "ecs/curl/8f03e41243824aea923aca126495f665"
    },
    "ContainerARN": "arn:aws:ecs:us-west-2:111122223333:container/0206b271-b33f-47ab-86c6-a0ba208a70a9",
    "Networks": [
        {
            "NetworkMode": "awsvpc",
            "IPv4Addresses": [
                "10.0.2.100"
            ],
            "AttachmentIndex": 0,
            "MACAddress": "0e:9e:32:c7:48:85",
            "IPv4SubnetCIDRBlock": "10.0.2.0/24",
            "PrivateDNSName": "ip-10-0-2-100.us-west-2.compute.internal",
            "SubnetGatewayIpv4Address": "10.0.2.1/24"
        }
    ]
}

Example task metadata response

When querying the ${ECS_CONTAINER_METADATA_URI_V4}/task endpoint you are returned metadata about the task the container is part of in addition to the metadata for each container within the task. The following is an example output.

{
    "Cluster": "default",
    "TaskARN": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
    "Family": "curltest",
    "ServiceName": "MyService",
    "Revision": "26",
    "DesiredStatus": "RUNNING",
    "KnownStatus": "RUNNING",
    "PullStartedAt": "2020-10-02T00:43:06.202617438Z",
    "PullStoppedAt": "2020-10-02T00:43:06.31288465Z",
    "AvailabilityZone": "us-west-2d",
    "VPCID": "vpc-1234567890abcdef0",
    "LaunchType": "EC2",
    "Containers": [
        {
            "DockerId": "598cba581fe3f939459eaba1e071d5c93bb2c49b7d1ba7db6bb19deeb70d8e38",
            "Name": "~internal~ecs~pause",
            "DockerName": "ecs-curltest-26-internalecspause-e292d586b6f9dade4a00",
            "Image": "amazon/amazon-ecs-pause:0.1.0",
            "ImageID": "",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "~internal~ecs~pause",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RESOURCES_PROVISIONED",
            "KnownStatus": "RESOURCES_PROVISIONED",
            "Limits": {
                "CPU": 0,
                "Memory": 0
            },
            "CreatedAt": "2020-10-02T00:43:05.602352471Z",
            "StartedAt": "2020-10-02T00:43:06.076707576Z",
            "Type": "CNI_PAUSE",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        },
        {
            "DockerId": "ee08638adaaf009d78c248913f629e38299471d45fe7dc944d1039077e3424ca",
            "Name": "curl",
            "DockerName": "ecs-curltest-26-curl-a0e7dba5aca6d8cb2e00",
            "Image": "111122223333.dkr.ecr.us-west-2.amazonaws.com/curltest:latest",
            "ImageID": "sha256:d691691e9652791a60114e67b365688d20d19940dde7c4736ea30e660d8d3553",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "curl",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RUNNING",
            "KnownStatus": "RUNNING",
            "Limits": {
                "CPU": 10,
                "Memory": 128
            },
            "CreatedAt": "2020-10-02T00:43:06.326590752Z",
            "StartedAt": "2020-10-02T00:43:06.767535449Z",
            "Type": "NORMAL",
            "LogDriver": "awslogs",
            "LogOptions": {
                "awslogs-create-group": "true",
                "awslogs-group": "/ecs/metadata",
                "awslogs-region": "us-west-2",
                "awslogs-stream": "ecs/curl/158d1c8083dd49d6b527399fd6414f5c"
            },
            "ContainerARN": "arn:aws:ecs:us-west-2:111122223333:container/abb51bdd-11b4-467f-8f6c-adcfe1fe059d",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        }
    ]
}

Example task with tags metadata response

When querying the ${ECS_CONTAINER_METADATA_URI_V4}/taskWithTags endpoint you are returned metadata about the task, including the task and container instance tags. The following is an example output.

{
    "Cluster": "default",
    "TaskARN": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
    "Family": "curltest",
    "ServiceName": "MyService",
    "Revision": "26",
    "DesiredStatus": "RUNNING",
    "KnownStatus": "RUNNING",
    "PullStartedAt": "2020-10-02T00:43:06.202617438Z",
    "PullStoppedAt": "2020-10-02T00:43:06.31288465Z",
    "AvailabilityZone": "us-west-2d",
    "VPCID": "vpc-1234567890abcdef0",
    "TaskTags": {
        "tag-use": "task-metadata-endpoint-test"
    },
    "ContainerInstanceTags":{
        "tag_key":"tag_value"
    },
    "LaunchType": "EC2",
    "Containers": [
        {
            "DockerId": "598cba581fe3f939459eaba1e071d5c93bb2c49b7d1ba7db6bb19deeb70d8e38",
            "Name": "~internal~ecs~pause",
            "DockerName": "ecs-curltest-26-internalecspause-e292d586b6f9dade4a00",
            "Image": "amazon/amazon-ecs-pause:0.1.0",
            "ImageID": "",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "~internal~ecs~pause",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RESOURCES_PROVISIONED",
            "KnownStatus": "RESOURCES_PROVISIONED",
            "Limits": {
                "CPU": 0,
                "Memory": 0
            },
            "CreatedAt": "2020-10-02T00:43:05.602352471Z",
            "StartedAt": "2020-10-02T00:43:06.076707576Z",
            "Type": "CNI_PAUSE",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        },
        {
            "DockerId": "ee08638adaaf009d78c248913f629e38299471d45fe7dc944d1039077e3424ca",
            "Name": "curl",
            "DockerName": "ecs-curltest-26-curl-a0e7dba5aca6d8cb2e00",
            "Image": "111122223333.dkr.ecr.us-west-2.amazonaws.com/curltest:latest",
            "ImageID": "sha256:d691691e9652791a60114e67b365688d20d19940dde7c4736ea30e660d8d3553",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "curl",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RUNNING",
            "KnownStatus": "RUNNING",
            "Limits": {
                "CPU": 10,
                "Memory": 128
            },
            "CreatedAt": "2020-10-02T00:43:06.326590752Z",
            "StartedAt": "2020-10-02T00:43:06.767535449Z",
            "Type": "NORMAL",
            "LogDriver": "awslogs",
            "LogOptions": {
                "awslogs-create-group": "true",
                "awslogs-group": "/ecs/metadata",
                "awslogs-region": "us-west-2",
                "awslogs-stream": "ecs/curl/158d1c8083dd49d6b527399fd6414f5c"
            },
            "ContainerARN": "arn:aws:ecs:us-west-2:111122223333:container/abb51bdd-11b4-467f-8f6c-adcfe1fe059d",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        }
    ]
}

Example task with tags with an error metadata response

When querying the ${ECS_CONTAINER_METADATA_URI_V4}/taskWithTags endpoint you are returned metadata about the task, including the task and container instance tags. If there is an error retrieving the tagging data, the error is returned in the response. The following is an example output for when the IAM role associated with the container instance doesn't have the ecs:ListTagsForResource permission allowed.

{
    "Cluster": "default",
    "TaskARN": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
    "Family": "curltest",
    "ServiceName": "MyService",
    "Revision": "26",
    "DesiredStatus": "RUNNING",
    "KnownStatus": "RUNNING",
    "PullStartedAt": "2020-10-02T00:43:06.202617438Z",
    "PullStoppedAt": "2020-10-02T00:43:06.31288465Z",
    "AvailabilityZone": "us-west-2d",
    "VPCID": "vpc-1234567890abcdef0",
    "Errors": [
        {
            "ErrorField": "ContainerInstanceTags",
            "ErrorCode": "AccessDeniedException",
            "ErrorMessage": "User: arn:aws:sts::111122223333:assumed-role/ecsInstanceRole/i-0744a608689EXAMPLE is not authorized to perform: ecs:ListTagsForResource on resource: arn:aws:ecs:us-west-2:111122223333:container-instance/default/2dd1b186f39845a584488d2ef155c131",
            "StatusCode": 400,
            "RequestId": "cd597ef0-272b-4643-9bd2-1de469870fa6",
            "ResourceARN": "arn:aws:ecs:us-west-2:111122223333:container-instance/default/2dd1b186f39845a584488d2ef155c131"
        },
        {
            "ErrorField": "TaskTags",
            "ErrorCode": "AccessDeniedException",
            "ErrorMessage": "User: arn:aws:sts::111122223333:assumed-role/ecsInstanceRole/i-0744a608689EXAMPLE is not authorized to perform: ecs:ListTagsForResource on resource: arn:aws:ecs:us-west-2:111122223333:task/default/9ef30e4b7aa44d0db562749cff4983f3",
            "StatusCode": 400,
            "RequestId": "862c5986-6cd2-4aa6-87cc-70be395531e1",
            "ResourceARN": "arn:aws:ecs:us-west-2:111122223333:task/default/9ef30e4b7aa44d0db562749cff4983f3"
        }
    ],
    "LaunchType": "EC2",
    "Containers": [
        {
            "DockerId": "598cba581fe3f939459eaba1e071d5c93bb2c49b7d1ba7db6bb19deeb70d8e38",
            "Name": "~internal~ecs~pause",
            "DockerName": "ecs-curltest-26-internalecspause-e292d586b6f9dade4a00",
            "Image": "amazon/amazon-ecs-pause:0.1.0",
            "ImageID": "",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "~internal~ecs~pause",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RESOURCES_PROVISIONED",
            "KnownStatus": "RESOURCES_PROVISIONED",
            "Limits": {
                "CPU": 0,
                "Memory": 0
            },
            "CreatedAt": "2020-10-02T00:43:05.602352471Z",
            "StartedAt": "2020-10-02T00:43:06.076707576Z",
            "Type": "CNI_PAUSE",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        },
        {
            "DockerId": "ee08638adaaf009d78c248913f629e38299471d45fe7dc944d1039077e3424ca",
            "Name": "curl",
            "DockerName": "ecs-curltest-26-curl-a0e7dba5aca6d8cb2e00",
            "Image": "111122223333.dkr.ecr.us-west-2.amazonaws.com/curltest:latest",
            "ImageID": "sha256:d691691e9652791a60114e67b365688d20d19940dde7c4736ea30e660d8d3553",
            "Labels": {
                "com.amazonaws.ecs.cluster": "default",
                "com.amazonaws.ecs.container-name": "curl",
                "com.amazonaws.ecs.task-arn": "arn:aws:ecs:us-west-2:111122223333:task/default/158d1c8083dd49d6b527399fd6414f5c",
                "com.amazonaws.ecs.task-definition-family": "curltest",
                "com.amazonaws.ecs.task-definition-version": "26"
            },
            "DesiredStatus": "RUNNING",
            "KnownStatus": "RUNNING",
            "Limits": {
                "CPU": 10,
                "Memory": 128
            },
            "CreatedAt": "2020-10-02T00:43:06.326590752Z",
            "StartedAt": "2020-10-02T00:43:06.767535449Z",
            "Type": "NORMAL",
            "LogDriver": "awslogs",
            "LogOptions": {
                "awslogs-create-group": "true",
                "awslogs-group": "/ecs/metadata",
                "awslogs-region": "us-west-2",
                "awslogs-stream": "ecs/curl/158d1c8083dd49d6b527399fd6414f5c"
            },
            "ContainerARN": "arn:aws:ecs:us-west-2:111122223333:container/abb51bdd-11b4-467f-8f6c-adcfe1fe059d",
            "Networks": [
                {
                    "NetworkMode": "awsvpc",
                    "IPv4Addresses": [
                        "10.0.2.61"
                    ],
                    "AttachmentIndex": 0,
                    "MACAddress": "0e:10:e2:01:bd:91",
                    "IPv4SubnetCIDRBlock": "10.0.2.0/24",
                    "PrivateDNSName": "ip-10-0-2-61.us-west-2.compute.internal",
                    "SubnetGatewayIpv4Address": "10.0.2.1/24"
                }
            ]
        }
    ]
}

Example container stats response

When querying the ${ECS_CONTAINER_METADATA_URI_V4}/stats endpoint you are returned network metrics for the container. For Amazon ECS tasks that use the awsvpc or bridge network modes hosted on Amazon EC2 instances running at least version 1.43.0 of the container agent, there will be additional network rate stats included in the response. For all other tasks, the response will only include the cumulative network stats.

The following is an example output from an Amazon ECS task on Amazon EC2 that uses the bridge network mode.

{
    "read": "2020-10-02T00:51:13.410254284Z",
    "preread": "2020-10-02T00:51:12.406202398Z",
    "pids_stats": {
        "current": 3
    },
    "blkio_stats": {
        "io_service_bytes_recursive": [
            
        ],
        "io_serviced_recursive": [
            
        ],
        "io_queue_recursive": [
            
        ],
        "io_service_time_recursive": [
            
        ],
        "io_wait_time_recursive": [
            
        ],
        "io_merged_recursive": [
            
        ],
        "io_time_recursive": [
            
        ],
        "sectors_recursive": [
            
        ]
    },
    "num_procs": 0,
    "storage_stats": {
        
    },
    "cpu_stats": {
        "cpu_usage": {
            "total_usage": 360968065,
            "percpu_usage": [
                182359190,
                178608875
            ],
            "usage_in_kernelmode": 40000000,
            "usage_in_usermode": 290000000
        },
        "system_cpu_usage": 13939680000000,
        "online_cpus": 2,
        "throttling_data": {
            "periods": 0,
            "throttled_periods": 0,
            "throttled_time": 0
        }
    },
    "precpu_stats": {
        "cpu_usage": {
            "total_usage": 360968065,
            "percpu_usage": [
                182359190,
                178608875
            ],
            "usage_in_kernelmode": 40000000,
            "usage_in_usermode": 290000000
        },
        "system_cpu_usage": 13937670000000,
        "online_cpus": 2,
        "throttling_data": {
            "periods": 0,
            "throttled_periods": 0,
            "throttled_time": 0
        }
    },
    "memory_stats": {
        "usage": 1806336,
        "max_usage": 6299648,
        "stats": {
            "active_anon": 606208,
            "active_file": 0,
            "cache": 0,
            "dirty": 0,
            "hierarchical_memory_limit": 134217728,
            "hierarchical_memsw_limit": 268435456,
            "inactive_anon": 0,
            "inactive_file": 0,
            "mapped_file": 0,
            "pgfault": 4185,
            "pgmajfault": 0,
            "pgpgin": 2926,
            "pgpgout": 2778,
            "rss": 606208,
            "rss_huge": 0,
            "total_active_anon": 606208,
            "total_active_file": 0,
            "total_cache": 0,
            "total_dirty": 0,
            "total_inactive_anon": 0,
            "total_inactive_file": 0,
            "total_mapped_file": 0,
            "total_pgfault": 4185,
            "total_pgmajfault": 0,
            "total_pgpgin": 2926,
            "total_pgpgout": 2778,
            "total_rss": 606208,
            "total_rss_huge": 0,
            "total_unevictable": 0,
            "total_writeback": 0,
            "unevictable": 0,
            "writeback": 0
        },
        "limit": 134217728
    },
    "name": "/ecs-curltest-26-curl-c2e5f6e0cf91b0bead01",
    "id": "5fc21e5b015f899d22618f8aede80b6d70d71b2a75465ea49d9462c8f3d2d3af",
    "networks": {
        "eth0": {
            "rx_bytes": 84,
            "rx_packets": 2,
            "rx_errors": 0,
            "rx_dropped": 0,
            "tx_bytes": 84,
            "tx_packets": 2,
            "tx_errors": 0,
            "tx_dropped": 0
        }
    },
    "network_rate_stats": {
        "rx_bytes_per_sec": 0,
        "tx_bytes_per_sec": 0
    }
}

Example task stats response

When querying the ${ECS_CONTAINER_METADATA_URI_V4}/task/stats endpoint you are returned network metrics about the task the container is part of. The following is an example output.

{
    "01999f2e5c6cf4df3873f28950e6278813408f281c54778efec860d0caad4854": {
        "read": "2020-10-02T00:51:32.51467703Z",
        "preread": "2020-10-02T00:51:31.50860463Z",
        "pids_stats": {
            "current": 1
        },
        "blkio_stats": {
            "io_service_bytes_recursive": [
                
            ],
            "io_serviced_recursive": [
                
            ],
            "io_queue_recursive": [
                
            ],
            "io_service_time_recursive": [
                
            ],
            "io_wait_time_recursive": [
                
            ],
            "io_merged_recursive": [
                
            ],
            "io_time_recursive": [
                
            ],
            "sectors_recursive": [
                
            ]
        },
        "num_procs": 0,
        "storage_stats": {
            
        },
        "cpu_stats": {
            "cpu_usage": {
                "total_usage": 177232665,
                "percpu_usage": [
                    13376224,
                    163856441
                ],
                "usage_in_kernelmode": 0,
                "usage_in_usermode": 160000000
            },
            "system_cpu_usage": 13977820000000,
            "online_cpus": 2,
            "throttling_data": {
                "periods": 0,
                "throttled_periods": 0,
                "throttled_time": 0
            }
        },
        "precpu_stats": {
            "cpu_usage": {
                "total_usage": 177232665,
                "percpu_usage": [
                    13376224,
                    163856441
                ],
                "usage_in_kernelmode": 0,
                "usage_in_usermode": 160000000
            },
            "system_cpu_usage": 13975800000000,
            "online_cpus": 2,
            "throttling_data": {
                "periods": 0,
                "throttled_periods": 0,
                "throttled_time": 0
            }
        },
        "memory_stats": {
            "usage": 532480,
            "max_usage": 6279168,
            "stats": {
                "active_anon": 40960,
                "active_file": 0,
                "cache": 0,
                "dirty": 0,
                "hierarchical_memory_limit": 9223372036854771712,
                "hierarchical_memsw_limit": 9223372036854771712,
                "inactive_anon": 0,
                "inactive_file": 0,
                "mapped_file": 0,
                "pgfault": 2033,
                "pgmajfault": 0,
                "pgpgin": 1734,
                "pgpgout": 1724,
                "rss": 40960,
                "rss_huge": 0,
                "total_active_anon": 40960,
                "total_active_file": 0,
                "total_cache": 0,
                "total_dirty": 0,
                "total_inactive_anon": 0,
                "total_inactive_file": 0,
                "total_mapped_file": 0,
                "total_pgfault": 2033,
                "total_pgmajfault": 0,
                "total_pgpgin": 1734,
                "total_pgpgout": 1724,
                "total_rss": 40960,
                "total_rss_huge": 0,
                "total_unevictable": 0,
                "total_writeback": 0,
                "unevictable": 0,
                "writeback": 0
            },
            "limit": 4073377792
        },
        "name": "/ecs-curltest-26-internalecspause-a6bcc3dbadfacfe85300",
        "id": "01999f2e5c6cf4df3873f28950e6278813408f281c54778efec860d0caad4854",
        "networks": {
            "eth0": {
                "rx_bytes": 84,
                "rx_packets": 2,
                "rx_errors": 0,
                "rx_dropped": 0,
                "tx_bytes": 84,
                "tx_packets": 2,
                "tx_errors": 0,
                "tx_dropped": 0
            }
        },
        "network_rate_stats": {
            "rx_bytes_per_sec": 0,
            "tx_bytes_per_sec": 0
        }
    },
    "5fc21e5b015f899d22618f8aede80b6d70d71b2a75465ea49d9462c8f3d2d3af": {
        "read": "2020-10-02T00:51:32.512771349Z",
        "preread": "2020-10-02T00:51:31.510597736Z",
        "pids_stats": {
            "current": 3
        },
        "blkio_stats": {
            "io_service_bytes_recursive": [
                
            ],
            "io_serviced_recursive": [
                
            ],
            "io_queue_recursive": [
                
            ],
            "io_service_time_recursive": [
                
            ],
            "io_wait_time_recursive": [
                
            ],
            "io_merged_recursive": [
                
            ],
            "io_time_recursive": [
                
            ],
            "sectors_recursive": [
                
            ]
        },
        "num_procs": 0,
        "storage_stats": {
            
        },
        "cpu_stats": {
            "cpu_usage": {
                "total_usage": 379075681,
                "percpu_usage": [
                    191355275,
                    187720406
                ],
                "usage_in_kernelmode": 60000000,
                "usage_in_usermode": 310000000
            },
            "system_cpu_usage": 13977800000000,
            "online_cpus": 2,
            "throttling_data": {
                "periods": 0,
                "throttled_periods": 0,
                "throttled_time": 0
            }
        },
        "precpu_stats": {
            "cpu_usage": {
                "total_usage": 378825197,
                "percpu_usage": [
                    191104791,
                    187720406
                ],
                "usage_in_kernelmode": 60000000,
                "usage_in_usermode": 310000000
            },
            "system_cpu_usage": 13975800000000,
            "online_cpus": 2,
            "throttling_data": {
                "periods": 0,
                "throttled_periods": 0,
                "throttled_time": 0
            }
        },
        "memory_stats": {
            "usage": 1814528,
            "max_usage": 6299648,
            "stats": {
                "active_anon": 606208,
                "active_file": 0,
                "cache": 0,
                "dirty": 0,
                "hierarchical_memory_limit": 134217728,
                "hierarchical_memsw_limit": 268435456,
                "inactive_anon": 0,
                "inactive_file": 0,
                "mapped_file": 0,
                "pgfault": 5377,
                "pgmajfault": 0,
                "pgpgin": 3613,
                "pgpgout": 3465,
                "rss": 606208,
                "rss_huge": 0,
                "total_active_anon": 606208,
                "total_active_file": 0,
                "total_cache": 0,
                "total_dirty": 0,
                "total_inactive_anon": 0,
                "total_inactive_file": 0,
                "total_mapped_file": 0,
                "total_pgfault": 5377,
                "total_pgmajfault": 0,
                "total_pgpgin": 3613,
                "total_pgpgout": 3465,
                "total_rss": 606208,
                "total_rss_huge": 0,
                "total_unevictable": 0,
                "total_writeback": 0,
                "unevictable": 0,
                "writeback": 0
            },
            "limit": 134217728
        },
        "name": "/ecs-curltest-26-curl-c2e5f6e0cf91b0bead01",
        "id": "5fc21e5b015f899d22618f8aede80b6d70d71b2a75465ea49d9462c8f3d2d3af",
        "networks": {
            "eth0": {
                "rx_bytes": 84,
                "rx_packets": 2,
                "rx_errors": 0,
                "rx_dropped": 0,
                "tx_bytes": 84,
                "tx_packets": 2,
                "tx_errors": 0,
                "tx_dropped": 0
            }
        },
        "network_rate_stats": {
            "rx_bytes_per_sec": 0,
            "tx_bytes_per_sec": 0
        }
    }
}