Book Image

Mastering KVM Virtualization

Book Image

Mastering KVM Virtualization

Overview of this book

A robust datacenter is essential for any organization – but you don’t want to waste resources. With KVM you can virtualize your datacenter, transforming a Linux operating system into a powerful hypervisor that allows you to manage multiple OS with minimal fuss. This book doesn’t just show you how to virtualize with KVM – it shows you how to do it well. Written to make you an expert on KVM, you’ll learn to manage the three essential pillars of scalability, performance and security – as well as some useful integrations with cloud services such as OpenStack. From the fundamentals of setting up a standalone KVM virtualization platform, and the best tools to harness it effectively, including virt-manager, and kimchi-project, everything you do is built around making KVM work for you in the real-world, helping you to interact and customize it as you need it. With further guidance on performance optimization for Microsoft Windows and RHEL virtual machines, as well as proven strategies for backup and disaster recovery, you’ll can be confident that your virtualized data center is working for your organization – not hampering it. Finally, the book will empower you to unlock the full potential of cloud through KVM. Migrating your physical machines to the cloud can be challenging, but once you’ve mastered KVM, it’s a little easie.
Table of Contents (22 chapters)
Mastering KVM Virtualization
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Deploying VMs using the thin provisioning method


Perform the following steps to get started with VM deployment using the thin provisioning method:

  1. Create two new qcow2 images using /vms/win7.raw as the backing file:

    # qemu-img create -b /vms/win7.img -f qcow2 /vms/vm1.qcow2
    #qemu-img create -b /vms/win7.img -f qcow2 /vms/vm2.qcow2
    
  2. Verify that the backing file attribute for newly created qcow2 images is pointing correctly to the image /vms/win7.raw, using the qemu-img command:

    qemu-img info /vms/vm2.qcow2
    image: /vms/vm2.qcow2
    file format: qcow2
    virtual size: 10G (10737418240 bytes)
    disk size: 196K
    cluster_size: 65536
    backing file: /vms/win7.img
    Format specific information:
      compat: 1.1
      lazy refcounts: false
      refcount bits: 16
      corrupt: false
    
  3. Now deploy the virtual machines named Windows1 and Windows2 using the virt-clone command:

    virt-clone --original-xml=/root/small.xml -f /vms/vm1.qcow2 -n Windows7-01 --preserve-data
    virt-clone --original-xml=/root/large.xml -f /vms/vm2.qcow2 -n Windows7...