Book Image

Learn OpenShift

By : Denis Zuev, Artemii Kropachev, Aleksey Usov
Book Image

Learn OpenShift

By: Denis Zuev, Artemii Kropachev, Aleksey Usov

Overview of this book

Docker containers transform application delivery technologies to make them faster and more reproducible, and to reduce the amount of time wasted on configuration. Managing Docker containers in the multi-node or multi-datacenter environment is a big challenge, which is why container management platforms are required. OpenShift is a new generation of container management platforms built on top of both Docker and Kubernetes. It brings additional functionality to the table, something that is lacking in Kubernetes. This new functionality significantly helps software development teams to bring software development processes to a whole new level. In this book, we’ll start by explaining the container architecture, Docker, and CRI-O overviews. Then, we'll look at container orchestration and Kubernetes. We’ll cover OpenShift installation, and its basic and advanced components. Moving on, we’ll deep dive into concepts such as deploying application OpenShift. You’ll learn how to set up an end-to-end delivery pipeline while working with applications in OpenShift as a developer or DevOps. Finally, you’ll discover how to properly design OpenShift in production environments. This book gives you hands-on experience of designing, building, and operating OpenShift Origin 3.9, as well as building new applications or migrating existing applications to OpenShift.
Table of Contents (24 chapters)

Managing OpenShift Networking

In the previous chapter, we introduced you to the realm of security in OpenShift. OpenShift is an enterprise-ready application management platform that supports multiple security features, making it able to integrate into any corporate security landscape.

Like any cloud platform, OpenShift heavily relies on a networking stack on two different layers:

  • The underlying network topology, which is directly determined either by physical network equipment or virtual network devices in the case of OpenShift itself deployed in the virtual environment. This level provides connectivity to OpenShift masters and nodes, and is beyond the control of OpenShift itself.
  • The virtual network topology, which is determined by the OpenShift SDN plugin being used. This level is concerned with managing connectivity between applications and providing external access to them...