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

Network segmentation

An important security aspect in any Kubernetes cluster is how Pods communicate between each other and also ingress and egress communication. Currently, there isn’t any graphical view on Kubernetes to check how the network communications are performed in real time, and neither allowed nor blocked flows. To help with that, ACS brings the Network Graph feature, which allows you to view the active communications in real time and also define and apply NPs to allow or block network traffic. Click on the Network Graph menu to access the feature:

Figure 12.54 – Network Graph feature

Select the rhacs-operator namespace to view what the network graph looks like:

Figure 12.55 – Network graph for the rhacs-operator namespace

You can change the view to see only active connections, allowed connections, or all types of connection flows.

Network flows

Red Hat Advanced Cluster Security can learn the network...