Kubernetes is very much in active development, though it is quite far into its development cycle. I started writing this book at the beginning of September 2017 and now, as I write the final chapter, it is the end of December 2017.
During this period there have been a total of 48 releases, as you can see from the following screenshot:
These updates cover everything from the maintenance releases v1.5, v1.6, and v1.7; the actual releases of v.1.8 and v1.9; and the subsequent maintenance releases all the way to the first alpha versions of v1.10. With such an active release cycle, how easy is it to keep on top of the releases?