Returns a list of tasks. You can filter the results by cluster, task definition family, container instance, launch type, what IAM principal started the task, or by the desired status of the task.
Recently stopped tasks might appear in the returned results.
Request Syntax{
"cluster": "string",
"containerInstance": "string",
"desiredStatus": "string",
"family": "string",
"launchType": "string",
"maxResults": number,
"nextToken": "string",
"serviceName": "string",
"startedBy": "string"
}For information about the parameters that are common to all actions, see Common Parameters.
The request accepts the following data in JSON format.
The short name or full Amazon Resource Name (ARN) of the cluster to use when filtering the ListTasks results. If you do not specify a cluster, the default cluster is assumed.
Type: String
Required: No
The container instance ID or full ARN of the container instance to use when filtering the ListTasks results. Specifying a containerInstance limits the results to tasks that belong to that container instance.
Type: String
Required: No
The task desired status to use when filtering the ListTasks results. Specifying a desiredStatus of STOPPED limits the results to tasks that Amazon ECS has set the desired status to STOPPED. This can be useful for debugging tasks that aren't starting properly or have died or finished. The default status filter is RUNNING, which shows tasks that Amazon ECS has set the desired status to RUNNING.
Although you can filter results based on a desired status of PENDING, this doesn't return any results. Amazon ECS never sets the desired status of a task to that value (only a task's lastStatus may have a value of PENDING).
Type: String
Valid Values: RUNNING | PENDING | STOPPED
Required: No
The name of the task definition family to use when filtering the ListTasks results. Specifying a family limits the results to tasks that belong to that family.
Type: String
Required: No
The launch type to use when filtering the ListTasks results.
Type: String
Valid Values: EC2 | FARGATE | EXTERNAL
Required: No
The maximum number of task results that ListTasks returned in paginated output. When this parameter is used, ListTasks only returns maxResults results in a single page along with a nextToken response element. The remaining results of the initial request can be seen by sending another ListTasks request with the returned nextToken value. This value can be between 1 and 100. If this parameter isn't used, then ListTasks returns up to 100 results and a nextToken value if applicable.
Type: Integer
Required: No
The nextToken value returned from a ListTasks request indicating that more results are available to fulfill the request and further calls will be needed. If maxResults was provided, it's possible the number of results to be fewer than maxResults.
This token should be treated as an opaque identifier that is only used to retrieve the next items in a list and not for other programmatic purposes.
Type: String
Required: No
The name of the service to use when filtering the ListTasks results. Specifying a serviceName limits the results to tasks that belong to that service.
Type: String
Required: No
The startedBy value to filter the task results with. Specifying a startedBy value limits the results to tasks that were started with that value.
When you specify startedBy as the filter, it must be the only filter that you use.
Type: String
Required: No
{
"nextToken": "string",
"taskArns": [ "string" ]
}If the action is successful, the service sends back an HTTP 200 response.
The following data is returned in JSON format by the service.
The nextToken value to include in a future ListTasks request. When the results of a ListTasks request exceed maxResults, this value can be used to retrieve the next page of results. This value is null when there are no more results to return.
Type: String
The list of task ARN entries for the ListTasks request.
Type: Array of strings
For information about the errors that are common to all actions, see Common Errors.
These errors are usually caused by a client action. This client action might be using an action or resource on behalf of a user that doesn't have permissions to use the action or resource. Or, it might be specifying an identifier that isn't valid.
HTTP Status Code: 400
The specified cluster wasn't found. You can view your available clusters with ListClusters. Amazon ECS clusters are Region specific.
HTTP Status Code: 400
The specified parameter isn't valid. Review the available parameters for the API request.
For more information about service event errors, see Amazon ECS service event messages.
HTTP Status Code: 400
These errors are usually caused by a server issue.
HTTP Status Code: 500
The specified service wasn't found. You can view your available services with ListServices. Amazon ECS services are cluster specific and Region specific.
HTTP Status Code: 400
In the following example or examples, the Authorization header contents (AUTHPARAMS) must be replaced with an AWS Signature Version 4 signature. For more information, see Signature Version 4 Signing Process in the AWS General Reference.
You only need to learn how to sign HTTP requests if you intend to create them manually. When you use the AWS Command Line Interface or one of the AWS SDKs to make requests to AWS, these tools automatically sign the requests for you, with the access key that you specify when you configure the tools. When you use these tools, you don't have to sign requests yourself.
ExampleThis example request lists all of the tasks in the default cluster.
Sample RequestPOST / HTTP/1.1
Host: ecs.us-east-1.amazonaws.com
Accept-Encoding: identity
Content-Length: 2
X-Amz-Target: AmazonEC2ContainerServiceV20141113.ListTasks
X-Amz-Date: 20150429T192615Z
Content-Type: application/x-amz-json-1.1
Authorization: AUTHPARAMS
{}HTTP/1.1 200 OK
Server: Server
Date: Wed, 29 Apr 2015 19:26:16 GMT
Content-Type: application/x-amz-json-1.1
Content-Length: 330
Connection: keep-alive
x-amzn-RequestId: 123a4b56-7c89-01d2-3ef4-example5678f
{
"taskArns": [
"arn:aws:ecs:us-east-1:012345678910:task/0b69d5c0-d655-4695-98cd-5d2d526d9d5a",
"arn:aws:ecs:us-east-1:012345678910:task/51a01bdf-d00e-487e-ab14-7645330b6207",
"arn:aws:ecs:us-east-1:012345678910:task/b0b28bb8-2be3-4810-b52b-88df129d893c",
"arn:aws:ecs:us-east-1:012345678910:task/c09f0188-7f87-4b0f-bfc3-16296622b6fe"
]
}For more information about using this API in one of the language-specific AWS SDKs, see the following:
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