With the help of an easy-to-use tool provided by Proxmox, users can easily improve their service by building up their own cluster. Proxmox is open source and combines two virtualization technologies (KVM- and container-based) under one platform, offering maximum flexibility for building virtual environments.This book starts with the basics and provides you with some background knowledge of server virtualization and then shows you the differences between other types of virtualization software, such as VMware, Hyper-V, Xen, and so on, versus Proxmox. By the end of this book, you will have a strong idea on how to plan, design, implement, and test your own cluster with a high level of availability.This book adopts a step-by-step, easy-to-follow approach and demonstrates a high availability cluster with brief descriptions and useful explanations on important topics.