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

Applying traffic rate limiting


Let us see how we can apply traffic rate limiting on an interface for designing Network QoS. The steps mentioned next will walk you through the procedure:

  1. As a rate limiting policy is applied on the interface, find out the corresponding network interface name of the virtual machine. virsh domiflist <vm-name> is a handy command for this:

    [root@kvmHOST1 ~]# virsh domiflist Fed1
    Interface  Type     Source   Model     MAC
    -------------------------------------------------------
    fed1     bridge   NewNetwork virtio    52:54:00:b3:40:
    
  2. SSH to the virtual machine and check what the current ingress traffic bandwidth is. I am using the iperf command to determine it. There are many other utilities available such as netperf, check speed, and so on:

    [root@Fed1 ~]# iperf -s
    ------------------------------------------------------------
    Server listening on TCP port 5001
    TCP window size: 85.3 KByte (default)
    ------------------------------------------------------------
    [ ...