Book Image

Mastering KVM Virtualization - Second Edition

By : Vedran Dakic, Humble Devassy Chirammal, Prasad Mukhedkar, Anil Vettathu
Book Image

Mastering KVM Virtualization - Second Edition

By: Vedran Dakic, Humble Devassy Chirammal, Prasad Mukhedkar, Anil Vettathu

Overview of this book

Kernel-based Virtual Machine (KVM) enables you to virtualize your data center by transforming your Linux operating system into a powerful hypervisor that allows you to manage multiple operating systems with minimal fuss. With this book, you'll gain insights into configuring, troubleshooting, and fixing bugs in KVM virtualization and related software. This second edition of Mastering KVM Virtualization is updated to cover the latest developments in the core KVM components - libvirt and QEMU. Starting with the basics of Linux virtualization, you'll explore VM lifecycle management and migration techniques. You’ll then learn how to use SPICE and VNC protocols while creating VMs and discover best practices for using snapshots. As you progress, you'll integrate third-party tools with Ansible for automation and orchestration. You’ll also learn to scale out and monitor your environments, and will cover oVirt, OpenStack, Eucalyptus, AWS, and ELK stack. Throughout the book, you’ll find out more about tools such as Cloud-Init and Cloudbase-Init. Finally, you'll be taken through the performance tuning and troubleshooting guidelines for KVM-based virtual machines and a hypervisor. By the end of this book, you'll be well-versed with KVM virtualization and the tools and technologies needed to build and manage diverse virtualization environments.
Table of Contents (22 chapters)
Section 1: KVM Virtualization Basics
Section 2: libvirt and ovirt for Virtual Machine Management
Section 3: Automation, Customization, and Orchestration for KVM VMs
Section 4: Scalability, Monitoring, Performance Tuning, and Troubleshooting

Chapter 5: Libvirt Storage

This chapter provides you with an insight into the way that KVM uses storage. Specifically, we will cover both storage that's internal to the host where we're running virtual machines and shared storage. Don't let the terminology confuse you here – in virtualization and cloud technologies, the term shared storage means storage space that multiple hypervisors can have access to. As we will explain a bit later, the three most common ways of achieving this are by using block-level, share-level, or object-level storage. We will use NFS as an example of share-level storage, and Internet Small Computer System Interface (iSCSI) and Fiber Channel (FC) as examples of block-level storage. In terms of object-based storage, we will use Ceph. GlusterFS is also commonly used nowadays, so we'll make sure that we cover that, too. To wrap everything up in an easy-to-use and easy-to-manage box, we will discuss some open source projects that might...