If you need an affordable and stable solution to offer high availability for virtual machines, this book is written for you. With this book you will learn how to build a HA solution with open source software. The solutions described in this book can help our organization save thousands of dollars on data center virtualization. You will learn how to create virtual machines using Xen and how to make them highly available using Pacemaker software. As a bonus, you will also read how to implement a cheap SAN solution, using open source software.