Book Image

OpenShift Multi-Cluster Management Handbook

By : Giovanni Fontana, Rafael Pecora
5 (1)
Book Image

OpenShift Multi-Cluster Management Handbook

5 (1)
By: Giovanni Fontana, Rafael Pecora

Overview of this book

For IT professionals working with Red Hat OpenShift Container Platform, the key to maximizing efficiency is understanding the powerful and resilient options to maintain the software development platform with minimal effort. OpenShift Multi-Cluster Management Handbook is a deep dive into the technology, containing knowledge essential for anyone who wants to work with OpenShift. This book starts by covering the architectural concepts and definitions necessary for deploying OpenShift clusters. It then takes you through designing Red Hat OpenShift for hybrid and multi-cloud infrastructure, showing you different approaches for multiple environments (from on-premises to cloud providers). As you advance, you’ll learn container security strategies to protect pipelines, data, and infrastructure on each layer. You’ll also discover tips for critical decision making once you understand the importance of designing a comprehensive project considering all aspects of an architecture that will allow the solution to scale as your application requires. By the end of this OpenShift book, you’ll know how to design a comprehensive Red Hat OpenShift cluster architecture, deploy it, and effectively manage your enterprise-grade clusters and other critical components using tools in OpenShift Plus.
Table of Contents (23 chapters)
Part 1 – Design Architectures for Red Hat OpenShift
Part 2 – Leverage Enterprise Products with Red Hat OpenShift
Part 3 – Multi-Cluster CI/CD on OpenShift Using GitOps
Part 4 – A Taste of Multi-Cluster Implementation and Security Compliance
Part 5 – Continuous Learning

Troubleshooting reference guide – how to start

In this section, you will see some approaches to troubleshooting your OpenShift cluster if you face any issues. Due to the power of the oc command-line interface (CLI), you will have different ways to succeed in almost any troubleshooting scenario of your OpenShift cluster. Along with your training, you will gain the experience you need to take a step further in using and troubleshooting your OpenShift/Kubernetes cluster.

Describing objects

As we have mentioned, the oc CLI is a powerful tool to help OpenShift users to do a lot of operations and also do some troubleshooting. One of the first steps of troubleshooting is to get some details and descriptions of the objects. Suppose, for instance, you have an issue related to a pod that is not coming up, for some reason. Let’s start our troubleshooting by checking the pod details, as follows:

$ oc describe pod sso-10-qm2hc

Check the output in the Events section of...