Book about Docker on Z

IBM has published a very nice document about Docker on the mainframe.

It is available as PDF download as well as via Knowledge Center. You can read one of the best container/Docker introductions I've seen on the Internet, as well as a good coverage of basic concepts around containers and Docker in the context of Z.
Chapter overiew:

Docker Enterprise Edition available for IBM Z

It has been signaled earlier this year, now it has been announced: Docker Enterprise Edition is available for Z. Version 17.06.1 has now been made available, and not only is it a new version for x86, but it also supports Z as "managed-to" platform. A lot of work went into this, and this is what the journey starts with:

• the engine of Docker Enterprise Edition will run on Linux on z Systems
• Docker Trusted Registry (DTR) can handle s390x images (while DTR runs on x86)
• Docker Universal Control Plane (UCP) can manage s390x nodes (while the UCP UI runs on x86)

So what exactly do these components provide? Here are more details (and some screenshots that may show the function set much better):