Book Image

Troubleshooting OpenStack

By : Tony Campbell
Book Image

Troubleshooting OpenStack

By: Tony Campbell

Overview of this book

OpenStack is a collection of software projects that work together to provide a cloud fabric. OpenStack is one of the fastest growing open source projects in history that unlocks cloud computing for everyone. With OpenStack, you are able to create public or private clouds on your own hardware. The flexibility and control afforded by OpenStack puts the cloud within reach of anyone willing to learn this technology. Starting with an introduction to OpenStack troubleshooting tools, we’ll walk through each OpenStack service and how you can quickly diagnose, troubleshoot, and correct problems in your OpenStack. Understanding the various projects and how they interact is essential for anyone attempting to troubleshoot an OpenStack cloud. We will start by explaining each of the major components and the dependencies between them, and move on to show you how to identify and utilize an effective set of OpenStack troubleshooting tools and fix common Keystone problems. Next, we will expose you to common errors and problems you may encounter when using the OpenStack Block Storage service (Cinder). We will then examine Heat, the OpenStack Orchestration Service, where you will learn how to trace errors, determine their root cause, and effectively correct the issue. Finally, you will get to know the best practices to architect your OpenStack cloud in order to achieve optimal performance, availability, and reliability.
Table of Contents (17 chapters)
Troubleshooting OpenStack
About the Author
About the Reviewer


In this chapter, we looked at how to resolve common issues with the Identity service. We learned how to tell which version of the Keystone API we are using and also looked at how to use the command-line interface clients to troubleshoot. We made calls to the Identity API in order to confirm that Keystone was running as expected and learned to troubleshoot issues with the Keystone database. We also checked the service catalog to make sure endpoints were properly configured and successfully ran Keystone as a WSGI application under Apache.

Keystone plays a central role in the successful operation of an OpenStack cluster. Each of the other OpenStack services depend on Keystone and the functionality it provides. As a result, successful troubleshooters will need to make sure that Keystone is running correctly. In the next chapter, we will look at how to troubleshoot the OpenStack Image service, code named Glance.