Amazon Elastic Container Registry (ECR) pull through cache now supports additional upstream registries in all AWS GovCloud (US) Regions and the AWS European Sovereign Cloud (Germany) Region

Amazon Elastic Container Registry (ECR) now supports pull through cache for additional upstream registries in AWS GovCloud (US) Regions and the AWS European Sovereign Cloud (Germany) Region, including private ECR-to-private ECR (within the same partition), ECR Public, Docker Hub, Quay, Kubernetes Container Registry, GitHub Container Registry, Microsoft Azure Container Registry, GitLab Container Registry, and Chainguard Registry. With pull through cache, customers can automatically sync container images from supported upstream registries into their ECR private registry, allowing them to benefit from the reduced latency of in-region image pulls and the built-in security features of ECR, such as lifecycle policies and enhanced scanning.

Customers often rely on publicly available container images from a variety of upstream registries to build and deploy their applications. Maintaining local copies of these images in ECR improves application startup times and reduces dependency on external registries, but manually syncing and managing these images adds operational overhead. Pull through cache simplifies this by automatically fetching images from the upstream registry on pull, caching them in an automatically created repository in the customer's ECR private registry, and keeping cached images up to date through frequent syncs with the upstream registry. Additionally, private ECR-to-private ECR pull through cache enables customers to sync images between ECR private registries across Regions and accounts within the same partition, providing a cost-effective way to cache only the images customers pull rather than replicate entire registries.

Pull through cache support for these upstream registries is now available in all AWS GovCloud (US) Regions and the AWS European Sovereign Cloud (Germany) Region. To learn more, visit the user guide.