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

Chapter 2. Troubleshooting OpenStack Identity

Keystone plays a crucial role in the OpenStack deployment. This project is responsible for providing services that support an identity, token management, a service catalog, and policy functionality. While Keystone does not depend on any other OpenStack services, most other OpenStack services depend on Keystone. This core dependency on Keystone means that problems with your Keystone services can cascade, causing problems for many of the other OpenStack services. Tracking down a problem in OpenStack can be complicated due to the different projects that operate together to provide a functionality. When troubleshooting OpenStack, it's smart to make sure that Keystone is operating as intended. In this chapter, we will explore the following topics:

  • Identifying different versions of the Keystone API and how to avoid configuration problems

  • Troubleshooting the command-line interface clients

  • Checking the Identity API

  • Fixing issues with the Keystone database...