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aws_ecr_images resource

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Use the aws_ecr_images InSpec audit resource to test the properties of all images in an AWS Elastic Container Registry (ECR) repository. This resource is available in InSpec AWS resource pack version 1.11.0 onwards.


An aws_ecr_images resource block declares the tests for all images in an AWS ECR repository by the repository name.

describe aws_ecr_images(repository_name: 'my-repo') do
  it { should exist }


The repository name must be provided. The ID of the registry is optional.

repository_name (required)

The name of the ECR repository must satisfy the following constraints:

  • Regex pattern (?:[a-z0-9]+(?:[._-][a-z0-9]+)*/)*[a-z0-9]+(?:[._-][a-z0-9]+)*.
  • Minimum 2 and maximum of 256 characters long.

registry_id (optional)

The 12-digit ID of the AWS Elastic Container Registry. If not provided, the default registry is assumed.


Property Description
digests The sha256 digest of the image manifest. The field name is digest.
size_in_bytes The size, in bytes, of the image in the repository.
tags The list of tags associated with an image. The field name is tags.
vulnerability_severity_counts The image vulnerability counts, sorted by severity.
vulnerability_scan_status The current state of the scan. It returns an image scan status object.
pushed_at_dates The date and time at which an image was pushed to the repository. The field name is pushed_at_date.


Ensure that there are exactly 3 images

describe aws_ecr_images(repository_name: 'my-repo') do
  its('count') { should cmp 3 }

Use this InSpec resource to request the digests of all images, then test in-depth using aws_ecr_image.

aws_ecr_images(repository_name: 'my-repo').digests.each do |image_digest|
  describe aws_ecr_image(repository_name: 'my-repo', image_digest: image_digest) do
    its('tags') { should include('latest') }


This InSpec audit resource has the following special matchers. For a full list of available matchers, please visit our matchers page.


The control will pass if the describe returns at least one result.

Use should_not to test the entity should not exist.

describe aws_ecr_images(repository_name: 'my-repo').where( <property>: <value>) do
  it { should exist }

describe aws_ecr_images(repository_name: 'my-repo').where( <property>: <value>) do
  it { should_not exist }

AWS Permissions

Your Principal will need the ecr:DescribeImages action set to allow.

You can find detailed documentation at Actions, Resources, and Condition Keys for Amazon ECR, and Actions, Resources, and Condition Keys for Identity And Access Management.

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