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)

Understanding the PHP build process

Now that we know that the phpinfo application works as expected, let's focus on the low-level details that are required to understand the build process. OpenShift created a number of API resources to make the build possible. Some of them are related to the deployment process, which we learned about in previous chapters. We can display all entities as follows:

$ oc get all
NAME TYPE FROM LATEST
buildconfigs/phpinfo Source Git@master 1

NAME TYPE FROM STATUS STARTED DURATION
builds/phpinfo-1 Source Git@638030d Complete About an hour ago 34s

NAME DOCKER REPO TAGS UPDATED
imagestreams/phpinfo 172.30.1.1:5000/phpinfo/phpinfo latest
About an hour ago

NAME REVISION DESIRED CURRENT TRIGGERED BY
deploymentconfigs/phpinfo 1...