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 Heat basic workflow

Two kinds of workflows are supported by Heat. Using the first type of workflow, Heat starts several tasks in parallel and waits till they are completed. In the second workflow type, a parallelized task is run for an arbitrary dependency graph.

The following diagram shows a basic workflow for the OpenStack Heat component:

The Heat CLI tools

The Heat CLI tools (already described in the previous sections) are used to send the queries to the Heat engine. This is done via the Heat API and the CloudWatch API.

The Heat API

The Heat API implements the REST API for OpenStack. It is used to send queries to the Heat engine via the AMPQ messaging system. This can be initiated from using Heat CLI Tools or a web application such as the horizon dashboard.

The Heat CloudWatch API

The Heat CloudWatch API component is used to get the metrics from the stacks. It actually refers to...