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Showing content from https://docs.aws.amazon.com/AmazonECS/latest/APIReference/API_ListClusters.html below:

ListClusters - Amazon Elastic Container Service

ListClusters

Returns a list of existing clusters.

Request Syntax

{
   "maxResults": number,
   "nextToken": "string"
}

Request Parameters

For information about the parameters that are common to all actions, see Common Parameters.

The request accepts the following data in JSON format.

maxResults

The maximum number of cluster results that ListClusters returned in paginated output. When this parameter is used, ListClusters 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 ListClusters request with the returned nextToken value. This value can be between 1 and 100. If this parameter isn't used, then ListClusters returns up to 100 results and a nextToken value if applicable.

Type: Integer

Required: No

nextToken

The nextToken value returned from a ListClusters request indicating that more results are available to fulfill the request and further calls are needed. If maxResults was provided, it's possible the number of results to be fewer than maxResults.

Note

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

Response Syntax

{
   "clusterArns": [ "string" ],
   "nextToken": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

clusterArns

The list of full Amazon Resource Name (ARN) entries for each cluster that's associated with your account.

Type: Array of strings

nextToken

The nextToken value to include in a future ListClusters request. When the results of a ListClusters 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

Errors

For information about the errors that are common to all actions, see Common Errors.

ClientException

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

InvalidParameterException

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

ServerException

These errors are usually caused by a server issue.

HTTP Status Code: 500

Examples

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.

Example

This example request lists the clusters for your account.

Sample Request

POST / HTTP/1.1
Host: ecs.us-east-1.amazonaws.com
Accept-Encoding: identity
Content-Length: 2
X-Amz-Target: AmazonEC2ContainerServiceV20141113.ListClusters
X-Amz-Date: 20150429T170621Z
Content-Type: application/x-amz-json-1.1
Authorization: AUTHPARAMS

{}

Sample Response

HTTP/1.1 200 OK
Server: Server
Date: Wed, 29 Apr 2015 17:06:21 GMT
Content-Type: application/x-amz-json-1.1
Content-Length: 126
Connection: keep-alive
x-amzn-RequestId: 123a4b56-7c89-01d2-3ef4-example5678f

{
  "clusterArns": [
    "arn:aws:ecs:us-east-1:012345678910:cluster/My-cluster",
    "arn:aws:ecs:us-east-1:012345678910:cluster/default"
  ]
}