What is the primary function of Docker Registry?

The primary function of Docker Registry is to store and distribute Docker images. A Docker Registry acts as a centralized repository where Docker images can be uploaded, stored, and retrieved. This service enables developers and teams to share their images easily and ensures that a consistent version of an image can be used across different environments, such as development, testing, and production.

In addition to storing images, Docker Registries can also manage image versions and handle permissions for access, making it a critical component in DevOps workflows where images need to be reliably retrieved and used. Public Docker Registries, like Docker Hub, allow users to find and use community-contributed images, while private registries offer organizations more control over their images, helping to maintain security and compliance standards.

The other options are functions associated with different aspects of container management, but they do not accurately define the primary role of a Docker Registry. For instance, managing container orchestration pertains to tools like Kubernetes rather than the storage and distribution of images. Controlling container runtime configurations involves working with container orchestrators or runtime environments, while a user interface for Docker commands relates more to command-line or graphical interfaces than to the specific storage function of the Registry itself.