As much as we would like it to be, OpenShift is not a single piece of technology - it's an entire stack of technologies many of which are complex in their own right, but together it can be a beast to comprehend. The benefits of OpenShift far outweigh the learning curve that comes with it so some of the most crucial technology services in the world rely on it. It's no wonder that OpenShift is one of, if not THE most in-demand skill set as of the writing of this review.I've read numerous books and countless guides and documentation on the topic of OpenShift, CICD, DevOps, Pipelines etc... and I've been impressed by what this book brings to the table. It's very well written with clear examples and intentions. You learn the "why's" while you learn the "what's".Why this book in particular? Because it is just the right amount of comprehensive. If you've ever waded into the world of OpenShift you'll know that there is a wealth of documentation available for free on the Internet, but you've probably also figured out that most of it is incomplete, incongruent, or too complex. This covers everything from deployment to troubleshooting, to application lifecycle management - a veritable "everything you wanted to know". You'll also get to learn about some pretty advanced topics such as RHACM and RHACS - two very powerful (IMO essential) tools for which there not enough documentation.The complexity of OpenShift leads much available documentation to focus on specific areas and assume a great deal about the reader's knowledge of everything else. For example, if you've ever tried to deploy a cluster while following documentation, you've probably come across a DNS section that said something like "Configure your DNS Server with the required entries." and just moved on expecting that you know what that means already. Maybe there was a link there that took you to some gigantic fifty page DNS document that wanted to tell you the history of Berkley before getting to the part that you actually needed to do the next step in your cluster install (assuming that the info was even there at all). Before you have that basic understanding it can sometimes be a challenge to even know what to search for to learn about it. In the case of the DNS example, this book just walks you through the process of installing BIND, creating zone files (from provided examples) and starting the service. In fact very little is taken for granted here.Where this book does make assumptions about your knowledge of containers, Kubernetes etc... it also refers you to specific named training (such as "Kube by Example") and resources to get you up to speed.Rather than be incomplete, some online documentation creates the opposite trouble - death by a thousand options. Since OpenShift and Kubernetes represent a lot of moving parts, there is a great deal of variability possible in the way you implement it. Much of the available documentation creates its own problem when it attempts to present every possible alternative. It's not always a matter of ten different ways to solve a problem either - sometimes the alternatives are matrixed with complex interdependencies (Like if you do A you have to do C & D, but if you do B you only have to do D). By contrast this book provides an opinionated approach while keeping branching to a minimum - you're left with carefully selected examples and instructions that are straightforward and will work for almost anyone.This book is easy to read, has great, practical examples (with code and everything) and takes very little for granted. It's great for beginners who want to get started with OpenShift and veterans who have maybe focused on a single area of the technology but want a more comprehensive understanding. If your company is in the midst of adopting OpenShift for the first time, or expanding your use of OpenShift in production, this book will be invaluable in helping you navigate that.

This is a resource that provides good information about image registry, container security, and multi-cluster management.