Docker registries

A Docker registry is a storage and distribution system for Docker images. Users must connect to a registry in order to load a Docker image onto a zCX instance. zCX supports one secure and one insecure registry.

Docker Hub is an external registry for finding and sharing container images. zCX can support base images in Docker hub that are tagged as "IBM Z" or "s390x".

You can also host a private, or local, Docker registry to account for security, network availability, and performance.