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
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
3
Stack Group of Connected Cloud Resources
Index

VM instances cannot connect to the external network or the Internet


If the virtual machine instances in OpenStack that were created using Heat are not able to communicate with the outside world, then there is a chance that the following configuration is missing in the Nova configuration file:

flat_interface = eth0
public_interface = eth0

These parameters should be set properly according to the physical interfaces on the host machine. In this example, it is assumed that eth0 is the public facing interface on a physical host where all-in-one OpenStack is installed.

It is necessary to adjust the name of the physical interface according to the actual configuration on the physical host machine.

If these configuration parameters are not set properly, then Nova will not be able to make entries for the IPTable rules, which might be required in order for the newly created instance to be able communicate to the Internet. Secondly, it is important to enable IP forwarding and making it persistent by using...