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)

OpenShift single-DC HA design

In the previous chapter, we briefly covered HA OpenShift HA in general, but we didn't discuss how to practically design OpenShift in your data center environment.

Let's recall what main OpenShift components we have and how they provide redundancy:

  • Openshift infrastructure nodes
  • OpenShift master nodes
  • OpenShift nodes
  • Etcd key-value store
  • Persistent storage

OpenShift infrastructure nodes

OpenShift infrastructure nodes are essential components that provide access from the outside of an OpenShift cluster. OpenShift infrastructure nodes scale horizontally, which means that we can add as many nodes as we need in order to add network throughput. If you recall from the previous chapter...