This topic describes the release notes of Container Registry.
|Image version cleanup for an instance||The number of image versions increases as the container-based business develops and iterates. The increasing number leads to complex image maintenance and high cost. Container Registry allows you to configure retention policies to delete image versions for an instance as needed. You can retain a specific number of recent images or images that match the specified regular expression. Other expired image versions are automatically deleted.||Container Registry Enterprise Edition instances||China (Beijing), China (Hangzhou), and China (Shanghai)|
|On-demand image loading that quadruples the distribution speed||Container Registry provides the on-demand image loading feature to accelerate image loading in elastic scaling scenarios that requires short cold start time and AI-based scenarios where large images slow the distribution. Container Registry can convert a standard container image to an accelerated image. Then, you can install the aliyun-acr-acceleration-suite component on worker nodes of an Alibaba Cloud Container Service for Kubernetes (ACK) cluster. Pods that are scheduled to the worker nodes load resources of images on demand and decompress image packages online. This feature reduces the average time to start a container by 60% and quadruples the speed of application distribution. This ensures that images are run with high efficiency.||Container Registry Enterprise Edition instances||China (Hangzhou), China (Shanghai), US (Virginia), and US (Silicon Valley)||Load resources of a container image on demand|
||Container Registry Enterprise Edition instances||All regions|
|Upgrade of global image synchronization links and accelerated synchronization across regions||The global image synchronization links are upgraded to support automatic image synchronization across major regions around the world. Container Registry provides a synchronization success rate higher than 99% and ensures efficient image distribution and iteration on a global scale. You can configure sync rules for Container Registry Enterprise Edition instances to synchronize images by namespace or repository. In addition, Internet access is not required for synchronizing images in Container Registry Enterprise Edition instances. This improves the convenience and security of image synchronization.||Container Registry Enterprise Edition instances||All regions||N/A|
|Image signing||Container Registry Enterprise Edition supports image signing. This prevents man-in-the-middle (MITM) attacks and unauthorized image updates or deployments. This way, image consistency and security from distribution to deployment is guaranteed. Container Registry supports automatic image signing by namespace. Every time an image is pushed to Container Registry, Container Registry automatically signs the image based on the matched signature rule. This ensures that your container images are trustworthy.||Container Registry Enterprise Edition instances||All regions||Sign container images|