Book Image

OpenStack Orchestration

By : Adnan Ahmed Siddiqui
Book Image

OpenStack Orchestration

By: Adnan Ahmed Siddiqui

Overview of this book

This book is focused on setting up and using one of the most important services in OpenStack orchestration, Heat. First, the book introduces you to the orchestration service for OpenStack to help you understand the uses of the templating mechanism, complex control groups of cloud resources, and huge-potential and multiple-use cases. We then move on to the topology and orchestration specification for cloud applications and standards, before introducing the most popular IaaS cloud framework, Heat. You will get to grips with the standards used in Heat, overview and roadmap, architecture and CLI, heat API, heat engine, CloudWatch API, scaling principles, JeOS and installation and configuration of Heat. We wrap up by giving you some insights into troubleshooting for OpenStack. With easy-to-follow, step-by-step instructions and supporting images, you will be able to manage OpenStack operations by implementing the orchestration services of Heat.
Table of Contents (14 chapters)
OpenStack Orchestration
About the Author
About the Reviewers
Stack Group of Connected Cloud Resources


Autoscaling is a feature in cloud computing that allows computing resources to be added or removed from a computing group (also called a stack) dynamically. This modification of resources is made depending upon the load requirements of the stack. Automatic elasticity is another term used for autoscaling. Automatically growing or shrinking the computing power allows the datacenter resource optimization and cost savings.

Vertical scaling versus horizontal scaling

We will now seek to understand the basic differences between these two scaling methods.

Vertical scaling

Vertical scaling refers to adding more resources to a server or computing machine by adding more CPU, RAM, storage, and so on. Vertical scaling is also known as scale up. There are pros and cons of vertically scaling a computer which are mentioned in the following diagram:

Let's discuss the pros and cons of vertical scaling:



  • Vertical scaling will require less power consumption then running multiple servers

  • Cooling...