@aws-cdk/aws-ecr

What is @aws-cdk/aws-ecr?

@aws-cdk/aws-ecr is an AWS Cloud Development Kit (CDK) library that allows you to define and manage Amazon Elastic Container Registry (ECR) resources using code. ECR is a fully managed Docker container registry that makes it easy to store, manage, and deploy Docker container images.

What are @aws-cdk/aws-ecr's main functionalities?

Create a new ECR Repository

This code sample demonstrates how to create a new ECR repository named 'my-repo' using the AWS CDK.

const ecr = require('@aws-cdk/aws-ecr');
const cdk = require('@aws-cdk/core');

class MyStack extends cdk.Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    new ecr.Repository(this, 'MyRepository', {
      repositoryName: 'my-repo'
    });
  }
}

const app = new cdk.App();
new MyStack(app, 'MyStack');

Add lifecycle policy to ECR Repository

This code sample demonstrates how to add a lifecycle policy to an ECR repository to retain only the last 5 images with the 'prod' tag.

const ecr = require('@aws-cdk/aws-ecr');
const cdk = require('@aws-cdk/core');

class MyStack extends cdk.Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    const repository = new ecr.Repository(this, 'MyRepository', {
      repositoryName: 'my-repo'
    });

    repository.addLifecycleRule({
      tagPrefixList: ['prod'],
      maxImageCount: 5
    });
  }
}

const app = new cdk.App();
new MyStack(app, 'MyStack');

Grant permissions to a user

This code sample demonstrates how to grant pull permissions to an IAM user for an ECR repository.

const ecr = require('@aws-cdk/aws-ecr');
const iam = require('@aws-cdk/aws-iam');
const cdk = require('@aws-cdk/core');

class MyStack extends cdk.Stack {
  constructor(scope, id, props) {
    super(scope, id, props);

    const repository = new ecr.Repository(this, 'MyRepository', {
      repositoryName: 'my-repo'
    });

    const user = new iam.User(this, 'MyUser');

    repository.grantPull(user);
  }
}

const app = new cdk.App();
new MyStack(app, 'MyStack');

Other packages similar to @aws-cdk/aws-ecr

aws-sdk

The aws-sdk package is the official AWS SDK for JavaScript, which provides a comprehensive set of tools for interacting with AWS services, including ECR. Unlike @aws-cdk/aws-ecr, which is used for defining infrastructure as code, aws-sdk is used for making API calls to AWS services.

serverless

The serverless framework is a toolkit for deploying and operating serverless architectures. It supports various AWS services, including ECR, for managing container images. While @aws-cdk/aws-ecr focuses on infrastructure as code, serverless provides a higher-level abstraction for deploying serverless applications.

terraform

Terraform is an open-source infrastructure as code software tool that provides a consistent CLI workflow to manage hundreds of cloud services, including AWS ECR. Terraform and @aws-cdk/aws-ecr both serve the purpose of defining cloud infrastructure, but Terraform is cloud-agnostic and can be used with multiple cloud providers.

README

Amazon ECR Construct Library

---

---

This package contains constructs for working with Amazon Elastic Container Registry.

Repositories

Define a repository by creating a new instance of Repository. A repository holds multiple verions of a single container image.

const repository = new ecr.Repository(this, 'Repository');

Image scanning

Amazon ECR image scanning helps in identifying software vulnerabilities in your container images. You can manually scan container images stored in Amazon ECR, or you can configure your repositories to scan images when you push them to a repository. To create a new repository to scan on push, simply enable imageScanOnPush in the properties

const repository = new ecr.Repository(this, 'Repo', {
  imageScanOnPush: true,
});

To create an onImageScanCompleted event rule and trigger the event target

declare const repository: ecr.Repository;
declare const target: SomeTarget;

repository.onImageScanCompleted('ImageScanComplete')
  .addTarget(target);

Authorization Token

Besides the Amazon ECR APIs, ECR also allows the Docker CLI or a language-specific Docker library to push and pull images from an ECR repository. However, the Docker CLI does not support native IAM authentication methods and additional steps must be taken so that Amazon ECR can authenticate and authorize Docker push and pull requests. More information can be found at at Registry Authentication.

A Docker authorization token can be obtained using the GetAuthorizationToken ECR API. The following code snippets grants an IAM user access to call this API.

const user = new iam.User(this, 'User');
ecr.AuthorizationToken.grantRead(user);

If you access images in the Public ECR Gallery as well, it is recommended you authenticate to the registry to benefit from higher rate and bandwidth limits.

See Pricing in https://aws.amazon.com/blogs/aws/amazon-ecr-public-a-new-public-container-registry/ and Service quotas.

The following code snippet grants an IAM user access to retrieve an authorization token for the public gallery.

const user = new iam.User(this, 'User');
ecr.PublicGalleryAuthorizationToken.grantRead(user);

This user can then proceed to login to the registry using one of the authentication methods.

Image tag immutability

You can set tag immutability on images in our repository using the imageTagMutability construct prop.

new ecr.Repository(this, 'Repo', { imageTagMutability: ecr.TagMutability.IMMUTABLE });

Encryption

By default, Amazon ECR uses server-side encryption with Amazon S3-managed encryption keys which encrypts your data at rest using an AES-256 encryption algorithm. For more control over the encryption for your Amazon ECR repositories, you can use server-side encryption with KMS keys stored in AWS Key Management Service (AWS KMS). Read more about this feature in the ECR Developer Guide.

When you use AWS KMS to encrypt your data, you can either use the default AWS managed key, which is managed by Amazon ECR, by specifying RepositoryEncryption.KMS in the encryption property. Or specify your own customer managed KMS key, by specifying the encryptionKey property.

When encryptionKey is set, the encryption property must be KMS or empty.

In the case encryption is set to KMS but no encryptionKey is set, an AWS managed KMS key is used.

new ecr.Repository(this, 'Repo', {
  encryption: ecr.RepositoryEncryption.KMS
});

Otherwise, a customer-managed KMS key is used if encryptionKey was set and encryption was optionally set to KMS.

import * as kms from '@aws-cdk/aws-kms';

new ecr.Repository(this, 'Repo', {
  encryptionKey: new kms.Key(this, 'Key'),
});

Automatically clean up repositories

You can set life cycle rules to automatically clean up old images from your repository. The first life cycle rule that matches an image will be applied against that image. For example, the following deletes images older than 30 days, while keeping all images tagged with prod (note that the order is important here):

declare const repository: ecr.Repository;
repository.addLifecycleRule({ tagPrefixList: ['prod'], maxImageCount: 9999 });
repository.addLifecycleRule({ maxImageAge: Duration.days(30) });