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)

Advanced deployment

The oc new-app command takes a number of parameters, allowing you to modify the deployment process according to your needs. For example, you may need to modify names, specify environment variables, and so on.

Advanced options can always be displayed by using the built-in help function, which can be displayed by oc new-app --help:

$ oc new-app --help
Create a new application by specifying source code, templates, and/or images

...
<OMITTED>
...

If you provide source code, a new build will be automatically triggered. You can use 'oc status' to
check the progress.

Usage:
oc new-app (IMAGE | IMAGESTREAM | TEMPLATE | PATH | URL ...) [options]

Examples:
# List all local templates and image streams that can be used to create an app
oc new-app --list

# Create an application based on the source code in the current git repository (with a public
remote)
# and...