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

Managing load balancers


Neutron includes a service known as Load Balancing as-a-Service (LBaaS), which provides users with the ability to create load balancers that balance traffic to applications deployed across instances in the cloud. In a reference architecture, Neutron relies on an open source load balancing package known as HAProxy to provide the load balancing functionality. Much like the Neutron L3 agent handles virtual routers and the DHCP agent handles virtual DHCP servers, the Neutron LBaaS agent handles the construction and configuration of virtual load balancers upon request.

Note

LBaaS should not be confused with another load balancing project known as Octavia. Both provide similar load balancing functions, but only LBaaS is covered here.

There are three major components to a load balancer in OpenStack:

  • Pool members

  • Pools

  • Listeners

A pool member describes a layer 4 object that is composed of the IP address and port of a service residing on an instance. For example, a pool member might...