If you're not looking for anything specific, you may want to start browsing the OpenShift Online documentaion at one of these spots:
June 2016
by Grant Shipley and Graham Dumpleton
OpenShift enables you to use Docker application containers and the Kubernetes cluster manager to automate the way you create, ship, and run applications. Through the course of the book, you’ll learn how to use OpenShift and the Wildfly application server to build and then immediately deploy a Java application online.
May 2017
by Stefano Picozzi, Mike Hepburn, Noel O’Connor
Three OpenShift experts at Red Hat explain how to configure Docker application containers and the Kubernetes cluster manager with OpenShift’s developer- and operational-centric tools. Discover how this infrastructure-agnostic container management platform can help companies navigate the murky area where infrastructure-as-code ends and application automation begins.