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[ aws . ecs ]

run-task

Description

Starts a new task using the specified task definition.

You can allow Amazon ECS to place tasks for you, or you can customize how Amazon ECS places tasks using placement constraints and placement strategies. For more information, see Scheduling Tasks in the Amazon Elastic Container Service Developer Guide .

Alternatively, you can use StartTask to use your own scheduler or place tasks manually on specific container instances.

The Amazon ECS API follows an eventual consistency model, due to the distributed nature of the system supporting the API. This means that the result of an API command you run that affects your Amazon ECS resources might not be immediately visible to all subsequent commands you run. Keep this in mind when you carry out an API command that immediately follows a previous API command.

To manage eventual consistency, you can do the following:

  • Confirm the state of the resource before you run a command to modify it. Run the DescribeTasks command using an exponential backoff algorithm to ensure that you allow enough time for the previous command to propagate through the system. To do this, run the DescribeTasks command repeatedly, starting with a couple of seconds of wait time and increasing gradually up to five minutes of wait time.
  • Add wait time between subsequent commands, even if the DescribeTasks command returns an accurate response. Apply an exponential backoff algorithm starting with a couple of seconds of wait time, and increase gradually up to about five minutes of wait time.

See also: AWS API Documentation

See 'aws help' for descriptions of global parameters.

Synopsis

  run-task
[--cluster <value>]
--task-definition <value>
[--overrides <value>]
[--count <value>]
[--started-by <value>]
[--group <value>]
[--placement-constraints <value>]
[--placement-strategy <value>]
[--launch-type <value>]
[--platform-version <value>]
[--network-configuration <value>]
[--tags <value>]
[--enable-ecs-managed-tags | --no-enable-ecs-managed-tags]
[--propagate-tags <value>]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]

Options

--cluster (string)

The short name or full Amazon Resource Name (ARN) of the cluster on which to run your task. If you do not specify a cluster, the default cluster is assumed.

--task-definition (string)

The family and revision (family:revision ) or full ARN of the task definition to run. If a revision is not specified, the latest ACTIVE revision is used.

--overrides (structure)

A list of container overrides in JSON format that specify the name of a container in the specified task definition and the overrides it should receive. You can override the default command for a container (that is specified in the task definition or Docker image) with a command override. You can also override existing environment variables (that are specified in the task definition or Docker image) on a container or add new environment variables to it with an environment override.

Note

A total of 8192 characters are allowed for overrides. This limit includes the JSON formatting characters of the override structure.

JSON Syntax:

{
  "containerOverrides": [
    {
      "name": "string",
      "command": ["string", ...],
      "environment": [
        {
          "name": "string",
          "value": "string"
        }
        ...
      ],
      "cpu": integer,
      "memory": integer,
      "memoryReservation": integer
    }
    ...
  ],
  "taskRoleArn": "string",
  "executionRoleArn": "string"
}

--count (integer)

The number of instantiations of the specified task to place on your cluster. You can specify up to 10 tasks per call.

--started-by (string)

An optional tag specified when a task is started. For example, if you automatically trigger a task to run a batch process job, you could apply a unique identifier for that job to your task with the startedBy parameter. You can then identify which tasks belong to that job by filtering the results of a ListTasks call with the startedBy value. Up to 36 letters (uppercase and lowercase), numbers, hyphens, and underscores are allowed.

If a task is started by an Amazon ECS service, then the startedBy parameter contains the deployment ID of the service that starts it.

--group (string)

The name of the task group to associate with the task. The default value is the family name of the task definition (for example, family:my-family-name).

--placement-constraints (list)

An array of placement constraint objects to use for the task. You can specify up to 10 constraints per task (including constraints in the task definition and those specified at runtime).

Shorthand Syntax:

type=string,expression=string ...

JSON Syntax:

[
  {
    "type": "distinctInstance"|"memberOf",
    "expression": "string"
  }
  ...
]

--placement-strategy (list)

The placement strategy objects to use for the task. You can specify a maximum of five strategy rules per task.

Shorthand Syntax:

type=string,field=string ...

JSON Syntax:

[
  {
    "type": "random"|"spread"|"binpack",
    "field": "string"
  }
  ...
]

--launch-type (string)

The launch type on which to run your task. For more information, see Amazon ECS Launch Types in the Amazon Elastic Container Service Developer Guide .

Possible values:

  • EC2
  • FARGATE

--platform-version (string)

The platform version the task should run. A platform version is only specified for tasks using the Fargate launch type. If one is not specified, the LATEST platform version is used by default. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .

--network-configuration (structure)

The network configuration for the task. This parameter is required for task definitions that use the awsvpc network mode to receive their own elastic network interface, and it is not supported for other network modes. For more information, see Task Networking in the Amazon Elastic Container Service Developer Guide .

Shorthand Syntax:

awsvpcConfiguration={subnets=[string,string],securityGroups=[string,string],assignPublicIp=string}

JSON Syntax:

{
  "awsvpcConfiguration": {
    "subnets": ["string", ...],
    "securityGroups": ["string", ...],
    "assignPublicIp": "ENABLED"|"DISABLED"
  }
}

--tags (list)

The metadata that you apply to the task to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define. Tag keys can have a maximum character length of 128 characters, and tag values can have a maximum length of 256 characters.

Shorthand Syntax:

key=string,value=string ...

JSON Syntax:

[
  {
    "key": "string",
    "value": "string"
  }
  ...
]

--enable-ecs-managed-tags | --no-enable-ecs-managed-tags (boolean)

Specifies whether to enable Amazon ECS managed tags for the task. For more information, see Tagging Your Amazon ECS Resources in the Amazon Elastic Container Service Developer Guide .

--propagate-tags (string)

Specifies whether to propagate the tags from the task definition or the service to the task. If no value is specified, the tags are not propagated.

Possible values:

  • TASK_DEFINITION
  • SERVICE

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.

See 'aws help' for descriptions of global parameters.

Examples

To run a task on your default cluster

This example command runs the specified task definition on your default cluster.

Command:

aws ecs run-task --cluster default --task-definition sleep360:1

Output:

{
    "tasks": [
        {
            "taskArn": "arn:aws:ecs:us-east-1:<aws_account_id>:task/a9f21ea7-c9f5-44b1-b8e6-b31f50ed33c0",
            "overrides": {
                "containerOverrides": [
                    {
                        "name": "sleep"
                    }
                ]
            },
            "lastStatus": "PENDING",
            "containerInstanceArn": "arn:aws:ecs:us-east-1:<aws_account_id>:container-instance/ffe3d344-77e2-476c-a4d0-bf560ad50acb",
            "desiredStatus": "RUNNING",
            "taskDefinitionArn": "arn:aws:ecs:us-east-1:<aws_account_id>:task-definition/sleep360:1",
            "containers": [
                {
                    "containerArn": "arn:aws:ecs:us-east-1:<aws_account_id>:container/58591c8e-be29-4ddf-95aa-ee459d4c59fd",
                    "taskArn": "arn:aws:ecs:us-east-1:<aws_account_id>:task/a9f21ea7-c9f5-44b1-b8e6-b31f50ed33c0",
                    "lastStatus": "PENDING",
                    "name": "sleep"
                }
            ]
        }
    ]
}

Output

tasks -> (list)

A full description of the tasks that were run. The tasks that were successfully placed on your cluster are described here.

(structure)

Details on a task in a cluster.

taskArn -> (string)

The Amazon Resource Name (ARN) of the task.

clusterArn -> (string)

The ARN of the cluster that hosts the task.

taskDefinitionArn -> (string)

The ARN of the task definition that creates the task.

containerInstanceArn -> (string)

The ARN of the container instances that host the task.

overrides -> (structure)

One or more container overrides.

containerOverrides -> (list)

One or more container overrides sent to a task.

(structure)

The overrides that should be sent to a container.

name -> (string)

The name of the container that receives the override. This parameter is required if any override is specified.

command -> (list)

The command to send to the container that overrides the default command from the Docker image or the task definition. You must also specify a container name.

(string)

environment -> (list)

The environment variables to send to the container. You can add new environment variables, which are added to the container at launch, or you can override the existing environment variables from the Docker image or the task definition. You must also specify a container name.

(structure)

A key-value pair object.

name -> (string)

The name of the key-value pair. For environment variables, this is the name of the environment variable.

value -> (string)

The value of the key-value pair. For environment variables, this is the value of the environment variable.

cpu -> (integer)

The number of cpu units reserved for the container, instead of the default value from the task definition. You must also specify a container name.

memory -> (integer)

The hard limit (in MiB) of memory to present to the container, instead of the default value from the task definition. If your container attempts to exceed the memory specified here, the container is killed. You must also specify a container name.

memoryReservation -> (integer)

The soft limit (in MiB) of memory to reserve for the container, instead of the default value from the task definition. You must also specify a container name.

taskRoleArn -> (string)

The Amazon Resource Name (ARN) of the IAM role that containers in this task can assume. All containers in this task are granted the permissions that are specified in this role.

executionRoleArn -> (string)

The Amazon Resource Name (ARN) of the task execution role that the Amazon ECS container agent and the Docker daemon can assume.

lastStatus -> (string)

The last known status of the task. For more information, see Task Lifecycle .

desiredStatus -> (string)

The desired status of the task. For more information, see Task Lifecycle .

cpu -> (string)

The number of CPU units used by the task as expressed in a task definition. It can be expressed as an integer using CPU units, for example 1024 . It can also be expressed as a string using vCPUs, for example 1 vCPU or 1 vcpu . String values are converted to an integer indicating the CPU units when the task definition is registered.

If you are using the EC2 launch type, this field is optional. Supported values are between 128 CPU units (0.125 vCPUs) and 10240 CPU units (10 vCPUs).

If you are using the Fargate launch type, this field is required and you must use one of the following values, which determines your range of supported values for the memory parameter:

  • 256 (.25 vCPU) - Available memory values: 512 (0.5 GB), 1024 (1 GB), 2048 (2 GB)
  • 512 (.5 vCPU) - Available memory values: 1024 (1 GB), 2048 (2 GB), 3072 (3 GB), 4096 (4 GB)
  • 1024 (1 vCPU) - Available memory values: 2048 (2 GB), 3072 (3 GB), 4096 (4 GB), 5120 (5 GB), 6144 (6 GB), 7168 (7 GB), 8192 (8 GB)
  • 2048 (2 vCPU) - Available memory values: Between 4096 (4 GB) and 16384 (16 GB) in increments of 1024 (1 GB)
  • 4096 (4 vCPU) - Available memory values: Between 8192 (8 GB) and 30720 (30 GB) in increments of 1024 (1 GB)

memory -> (string)

The amount of memory (in MiB) used by the task as expressed in a task definition. It can be expressed as an integer using MiB, for example 1024 . It can also be expressed as a string using GB, for example 1GB or 1 GB . String values are converted to an integer indicating the MiB when the task definition is registered.

If you are using the EC2 launch type, this field is optional.

If you are using the Fargate launch type, this field is required and you must use one of the following values, which determines your range of supported values for the cpu parameter:

  • 512 (0.5 GB), 1024 (1 GB), 2048 (2 GB) - Available cpu values: 256 (.25 vCPU)
  • 1024 (1 GB), 2048 (2 GB), 3072 (3 GB), 4096 (4 GB) - Available cpu values: 512 (.5 vCPU)
  • 2048 (2 GB), 3072 (3 GB), 4096 (4 GB), 5120 (5 GB), 6144 (6 GB), 7168 (7 GB), 8192 (8 GB) - Available cpu values: 1024 (1 vCPU)
  • Between 4096 (4 GB) and 16384 (16 GB) in increments of 1024 (1 GB) - Available cpu values: 2048 (2 vCPU)
  • Between 8192 (8 GB) and 30720 (30 GB) in increments of 1024 (1 GB) - Available cpu values: 4096 (4 vCPU)

containers -> (list)

The containers associated with the task.

(structure)

A Docker container that is part of a task.

containerArn -> (string)

The Amazon Resource Name (ARN) of the container.

taskArn -> (string)

The ARN of the task.

name -> (string)

The name of the container.

lastStatus -> (string)

The last known status of the container.

exitCode -> (integer)

The exit code returned from the container.

reason -> (string)

A short (255 max characters) human-readable string to provide additional details about a running or stopped container.

networkBindings -> (list)

The network bindings associated with the container.

(structure)

Details on the network bindings between a container and its host container instance. After a task reaches the RUNNING status, manual and automatic host and container port assignments are visible in the networkBindings section of DescribeTasks API responses.

bindIP -> (string)

The IP address that the container is bound to on the container instance.

containerPort -> (integer)

The port number on the container that is used with the network binding.

hostPort -> (integer)

The port number on the host that is used with the network binding.

protocol -> (string)

The protocol used for the network binding.

networkInterfaces -> (list)

The network interfaces associated with the container.

(structure)

An object representing the elastic network interface for tasks that use the awsvpc network mode.

attachmentId -> (string)

The attachment ID for the network interface.

privateIpv4Address -> (string)

The private IPv4 address for the network interface.

ipv6Address -> (string)

The private IPv6 address for the network interface.

healthStatus -> (string)

The health status of the container. If health checks are not configured for this container in its task definition, then it reports the health status as UNKNOWN .

startedBy -> (string)

The tag specified when a task is started. If the task is started by an Amazon ECS service, then the startedBy parameter contains the deployment ID of the service that starts it.

version -> (long)

The version counter for the task. Every time a task experiences a change that triggers a CloudWatch event, the version counter is incremented. If you are replicating your Amazon ECS task state with CloudWatch Events, you can compare the version of a task reported by the Amazon ECS API actionss with the version reported in CloudWatch Events for the task (inside the detail object) to verify that the version in your event stream is current.

stoppedReason -> (string)

The reason that the task was stopped.

stopCode -> (string)

The stop code indicating why a task was stopped. The stoppedReason may contain additional details.

connectivity -> (string)

The connectivity status of a task.

connectivityAt -> (timestamp)

The Unix timestamp for when the task last went into CONNECTED status.

pullStartedAt -> (timestamp)

The Unix timestamp for when the container image pull began.

pullStoppedAt -> (timestamp)

The Unix timestamp for when the container image pull completed.

executionStoppedAt -> (timestamp)

The Unix timestamp for when the task execution stopped.

createdAt -> (timestamp)

The Unix timestamp for when the task was created (the task entered the PENDING state).

startedAt -> (timestamp)

The Unix timestamp for when the task started (the task transitioned from the PENDING state to the RUNNING state).

stoppingAt -> (timestamp)

The Unix timestamp for when the task stops (transitions from the RUNNING state to STOPPED ).

stoppedAt -> (timestamp)

The Unix timestamp for when the task was stopped (the task transitioned from the RUNNING state to the STOPPED state).

group -> (string)

The name of the task group associated with the task.

launchType -> (string)

The launch type on which your task is running. For more information, see Amazon ECS Launch Types in the Amazon Elastic Container Service Developer Guide .

platformVersion -> (string)

The platform version on which your task is running. A platform version is only specified for tasks using the Fargate launch type. If one is not specified, the LATEST platform version is used by default. For more information, see AWS Fargate Platform Versions in the Amazon Elastic Container Service Developer Guide .

attachments -> (list)

The Elastic Network Adapter associated with the task if the task uses the awsvpc network mode.

(structure)

An object representing a container instance or task attachment.

id -> (string)

The unique identifier for the attachment.

type -> (string)

The type of the attachment, such as ElasticNetworkInterface .

status -> (string)

The status of the attachment. Valid values are PRECREATED , CREATED , ATTACHING , ATTACHED , DETACHING , DETACHED , and DELETED .

details -> (list)

Details of the attachment. For elastic network interfaces, this includes the network interface ID, the MAC address, the subnet ID, and the private IPv4 address.

(structure)

A key-value pair object.

name -> (string)

The name of the key-value pair. For environment variables, this is the name of the environment variable.

value -> (string)

The value of the key-value pair. For environment variables, this is the value of the environment variable.

healthStatus -> (string)

The health status for the task, which is determined by the health of the essential containers in the task. If all essential containers in the task are reporting as HEALTHY , then the task status also reports as HEALTHY . If any essential containers in the task are reporting as UNHEALTHY or UNKNOWN , then the task status also reports as UNHEALTHY or UNKNOWN , accordingly.

Note

The Amazon ECS container agent does not monitor or report on Docker health checks that are embedded in a container image (such as those specified in a parent image or from the image's Dockerfile) and not specified in the container definition. Health check parameters that are specified in a container definition override any Docker health checks that exist in the container image.

tags -> (list)

The metadata that you apply to the task to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define. Tag keys can have a maximum character length of 128 characters, and tag values can have a maximum length of 256 characters.

(structure)

The metadata that you apply to a resource to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define. Tag keys can have a maximum character length of 128 characters, and tag values can have a maximum length of 256 characters.

key -> (string)

One part of a key-value pair that make up a tag. A key is a general label that acts like a category for more specific tag values.

value -> (string)

The optional part of a key-value pair that make up a tag. A value acts as a descriptor within a tag category (key).

failures -> (list)

Any failures associated with the call.

(structure)

A failed resource.

arn -> (string)

The Amazon Resource Name (ARN) of the failed resource.

reason -> (string)

The reason for the failure.