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Amazon EC2 Container Registry
API Reference (API Version 2015-09-21)

DescribeImages

Returns metadata about the images in a repository, including image size, image tags, and creation date.

Note

Beginning with Docker version 1.9, the Docker client compresses image layers before pushing them to a V2 Docker registry. The output of the docker images command shows the uncompressed image size, so it may return a larger image size than the image sizes returned by DescribeImages.

Request Syntax

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{ "filter": { "tagStatus": "string" }, "imageIds": [ { "imageDigest": "string", "imageTag": "string" } ], "maxResults": number, "nextToken": "string", "registryId": "string", "repositoryName": "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.

filter

The filter key and value with which to filter your DescribeImages results.

Type: DescribeImagesFilter object

Required: No

imageIds

The list of image IDs for the requested repository.

Type: array of ImageIdentifier objects

Array Members: Minimum number of 1 item. Maximum number of 100 items.

Required: No

maxResults

The maximum number of repository results returned by DescribeImages in paginated output. When this parameter is used, DescribeImages 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 DescribeImages request with the returned nextToken value. This value can be between 1 and 100. If this parameter is not used, then DescribeImages returns up to 100 results and a nextToken value, if applicable.

Type: Integer

Valid Range: Minimum value of 1. Maximum value of 100.

Required: No

nextToken

The nextToken value returned from a previous paginated DescribeImages request where maxResults was used and the results exceeded the value of that parameter. Pagination continues from the end of the previous results that returned the nextToken value. This value is null when there are no more results to return.

Type: String

Required: No

registryId

The AWS account ID associated with the registry that contains the repository in which to describe images. If you do not specify a registry, the default registry is assumed.

Type: String

Pattern: [0-9]{12}

Required: No

repositoryName

A list of repositories to describe. If this parameter is omitted, then all repositories in a registry are described.

Type: String

Length Constraints: Minimum length of 2. Maximum length of 256.

Pattern: (?:[a-z0-9]+(?:[._-][a-z0-9]+)*/)*[a-z0-9]+(?:[._-][a-z0-9]+)*

Required: Yes

Response Syntax

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{ "imageDetails": [ { "imageDigest": "string", "imagePushedAt": number, "imageSizeInBytes": number, "imageTags": [ "string" ], "registryId": "string", "repositoryName": "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.

imageDetails

A list of ImageDetail objects that contain data about the image.

Type: array of ImageDetail objects

nextToken

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

ImageNotFoundException

The image requested does not exist in the specified repository.

HTTP Status Code: 400

InvalidParameterException

The specified parameter is invalid. Review the available parameters for the API request.

HTTP Status Code: 400

RepositoryNotFoundException

The specified repository could not be found. Check the spelling of the specified repository and ensure that you are performing operations on the correct registry.

HTTP Status Code: 400

ServerException

These errors are usually caused by a server-side issue.

HTTP Status Code: 500

Example

In the following example or examples, the Authorization header contents (AUTHPARAMS) must be replaced with an AWS Signature Version 4 signature. For more information about creating these signatures, 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 manually create them. When you use the AWS Command Line Interface (AWS CLI) 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 need to learn how to sign requests yourself.

Example

This example describes the images in a repository named ubuntu in the default account. Note that the image with the digest sha256:7a64bc9c8843b0a8c8b8a7e4715b7615e4e1b0d8ca3c7e7a76ec8250899c397a is tagged as latest and xenial.

Sample Request

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POST / HTTP/1.1 Host: ecr.us-west-2.amazonaws.com Accept-Encoding: identity Content-Length: 28 X-Amz-Target: AmazonEC2ContainerRegistry_V20150921.DescribeImages X-Amz-Date: 20161216T193133Z User-Agent: aws-cli/1.11.22 Python/2.7.12 Darwin/16.3.0 botocore/1.4.79 Content-Type: application/x-amz-json-1.1 Authorization: AUTHPARAMS { "repositoryName": "ubuntu" }

Sample Response

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HTTP/1.1 200 OK Server: Server Date: Fri, 16 Dec 2016 19:31:33 GMT Content-Type: application/x-amz-json-1.1 Content-Length: 1107 Connection: keep-alive x-amzn-RequestId: 404826b1-c3c6-11e6-a9e5-e3c203a2f07f { "imageDetails": [ { "imageDigest": "sha256:7c70a5ebcc7fcaa22974a71175ba674efce3951fbec624943c891e9d256927c1", "imagePushedAt": 1452721263, "imageSizeInBytes": 44194573, "registryId": "012345678910", "repositoryName": "ubuntu" }, { "imageDigest": "sha256:abdc090336ba4503bd72d0961a4f3d45134900d9a793d3f0c06a64d2555fbab7", "imagePushedAt": 1481916613, "imageSizeInBytes": 39142127, "imageTags": [ "precise" ], "registryId": "012345678910", "repositoryName": "ubuntu" }, { "imageDigest": "sha256:78dea3347768ba553ee8971cfb2dfa4c3efcd96db84ebfcdda59ba8d6057941b", "imagePushedAt": 1452721207, "imageSizeInBytes": 65747044, "registryId": "012345678910", "repositoryName": "ubuntu" }, { "imageDigest": "sha256:7a64bc9c8843b0a8c8b8a7e4715b7615e4e1b0d8ca3c7e7a76ec8250899c397a", "imagePushedAt": 1481916523, "imageSizeInBytes": 50223482, "imageTags": [ "xenial", "latest" ], "registryId": "012345678910", "repositoryName": "ubuntu" }, { "imageDigest": "sha256:881befbe6f54c1e85029fe3a11554342bf765a0849600ecb8fa2f922798b4925", "imagePushedAt": 1481916647, "imageSizeInBytes": 65770577, "imageTags": [ "trusty" ], "registryId": "012345678910", "repositoryName": "ubuntu" } ] }

See Also

For more information about using this API in one of the language-specific AWS SDKs, see the following: