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

Deploying an application into multiple clusters

Now that we already have multiple remote clusters, we can go ahead and use ACM and ArgoCD to make our pipeline able to deploy into all of them at once. We are going to change the deploy task to use an ApplicationSet object that will be responsible for deploying our application into both OpenShift remote clusters at once.

Figure 14.31 – Pipeline with deployment into multiple clusters

To make ArgoCD aware of the clusters managed by ACM, we first need to create a few objects, such as the GitOpsCluster Custom Resource. We covered a detailed explanation of these objects in Chapter 11, OpenShift Multi-Cluster GitOps and Management. Run the following commands to create these objects:

$ cd OpenShift-Multi-Cluster-Management-Handbook/chapter14/Multicluster-Deployment
$ oc apply -f GitOpsCluster/

Now let’s create and run the pipeline, which uses an ApplicationSet object to deploy the application into...