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

Heat components

The following are the main components for the Heat orchestration framework:

  • The Heat CLI

  • heat-api

  • heat-api-cfn

  • heat-engine

  • Heat Orchestration Template (HOT)

The Heat CLI

The Heat CLI is the command-line tool for Heat. It interacts with heat-api to run AWS CloudFormation commands; or otherwise, it can directly run REST API commands for Heat.


The heat-api component offers a REST API, which is OpenStack native. To process the user requests, this API forwards those requests to the Heat engine using the RPC.


The heat-api-cfn module offers another API that is compatible with AWS CloudFormation. It also processes queries after forwarding them to heat-engine over RPC.


The heat-engine is the core component of the Orchestration service for OpenStack. It is responsible for launching new services and instances according to the given templates.

Heat Orchestration Template (HOT) specification

Heat Orchestration Template (HOT) is a new template format developed as an...