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

The template structure

HOT (Heat Orchestration Template) is a native format that has been recently developed to be used with Heat. Besides HOT, Heat is also compatible with AWS CloudFormation templates. Heat Orchestration Templates uses the YAML format. The following is the structure of a basic HOT template:

heat_template_version: 2013-05-23
# This describes the purpose of template
# Here input parameters groups are defined in an order
#In this section, input parameters are declared in an order
# Template resources are declared in this section
# In this section output parameters are declared.

The different parameters of a basic HOT template are:

  • heat_template_version: This parameter is used to mention the version of the template. The date is the release date of OpenStack (for example, Juno, Icehouse, and so on).

  • description: This parameter is used to explaining the purpose of this template.

  • parameter_groups: This section explains...