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

A template is not working after editing

It's easy to introduce JSON syntax errors when editing templates, so this can be useful to identify what/where is broken:

Nova starts creating instances that immediately go to the ERROR state. If it is observed that instances are not being created properly and if the command nova list shows ERROR state, then it will be necessary to check the scheduler log.

The following is a sample error message displayed under /var/log/nova/scheduler.log:

To solve this problem, it is necessary to set the Nova configuration file (/etc/nova.conf) as follows:


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