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

Integrating OpenStack with Ansible

Dealing with any large-scale application is not easy, and not having the right tool can make it impossible. OpenStack provides a lot of ways for us to directly orchestrate and manage a huge horizontal deployment, but sometimes, this is not enough. Luckily, in our arsenal of tools, we have another one – Ansible. In Chapter 11, Ansible for Orchestration and Automation, we covered some other, smaller ways to use Ansible to deploy and configure individual machines, so we are not going to go back to that. Instead, we are going to focus on things that Ansible is good for in the OpenStack environment.

One thing that we must make clear, though, is that using Ansible in an OpenStack environment can be based on two very distinct scenarios. One is using Ansible to handle deployed instances, in a way that would pretty much look the same across all the other cloud or bare-metal deployments. You, as an administrator of a large number of instances, create...