Last week a read
Skalierbare Container-Infrastrukturen: Das Handbuch für Administratoren und DevOps-Teams. Inkl. Container-Orchestrierung mit Docker, Rocket, Kubernetes, Rancher & Co.
This book offers an all-round look at really all topics: From Docker (300 pages) to registries to alternative container platforms. Then to container clusters (including Pacemaker setups) and via Docker-Swarm to the popular topic Kubernetes (also 300 pages). Finally there is Rancher, Mesosphere and Ceph. The sections on Docker and Kubernetes could each be separated out as separate books, as the descriptions are so extensive and worth knowing.
If you are interested, take a look at my review at amazon.de (like all my reviews: written in german ;-).