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)

Using persistent storage in pods

Previously, we created all required PV OpenShift API objects, which are provided by OpenStack cluster administrators. Now, we are going to show you how to use persistent storage in your applications. Any OpenShift users can request persistent volume through the PVC concept.

Requesting persistent volume

Once the PV resource is available, any OpenShift user can create a PVC to request storage and later use that PVC to attach it as a volume to containers in pods.

Upcoming examples don't have to be run under the system:admin account. Any unprivileged OpenShift user can request persistent volumes using PVC.

Users should create PVC definitions using either YAML or JSON syntax. The following...