Book Image

OpenStack Cloud Computing Cookbook - Fourth Edition

By : Kevin Jackson, Cody Bunch, Egle Sigler, James Denton
Book Image

OpenStack Cloud Computing Cookbook - Fourth Edition

By: Kevin Jackson, Cody Bunch, Egle Sigler, James Denton

Overview of this book

This is the fourth edition of the industry-acclaimed OpenStack Cloud Computing Cookbook, created by four recognized OpenStack experts. It has now been updated to work with the latest OpenStack builds, using tools and processes based on their collective and vast OpenStack experience. OpenStack Open Source Cloud software is one of the most used cloud infrastructures to support a wide variety of use cases, from software development to big data analysis. It is developed by a thriving community of individual developers from around the globe and backed by most of the leading players in the cloud space today. We make it simple to implement, massively scalable, and able to store a large pool of data and networking resources. OpenStack has a strong ecosystem that helps you provision your cloud storage needs. Add OpenStack's enterprise features to reduce the cost of your business. This book will begin by showing you the steps to build up an OpenStack private cloud environment using Ansible. You'll then discover the uses of cloud services such as the identity service, image service, and compute service. You'll dive into Neutron, the OpenStack Networking service, and get your hands dirty with configuring networks, routers, load balancers, and more. You’ll then gather more expert knowledge on OpenStack cloud computing by managing your cloud's security and migration. After that, we delve into OpenStack Object storage and you’ll see how to manage servers and work with objects, cluster, and storage functionalities. Finally, you will learn about OpenStack dashboard, Ansible, Keystone, and other interesting topics.
Table of Contents (15 chapters)
OpenStack Cloud Computing Cookbook Fourth Edition
Contributors
Preface
Another Book You May Enjoy
Index

Setting CPU limits for a flavor


In addition to defining the number of vCPUs assigned to an instance, limits on the use of these CPU cycles can be further imposed. Nova relies on the underlying hypervisor for the specific implementation of the CPU limits, and thus the values available may vary. Our example is based on QEMU/KVM.

CPU limits are a special case of flavor attributes that you may encounter.

Getting ready

To add a CPU limit to a flavor, you will need the following:

  • The openstack command-line client

  • The openrc file containing appropriate credentials

  • The name of the flavor to change

  • The values you would like to set the CPU limit to (share of time the allotted CPU is allowed to consume in milliseconds per cycle)

These values in our example are as follows:

  • cpu_quota = 5000 ms

  • cpu_period = 2500 ms

How to do it…

The following commands are used to add CPU limits to a flavor.

Note

CPU limits are not applied live. Rather, they are applied on instance launch.

At the time of this writing, the openstack...