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

Cinder dependencies

Like most other OpenStack services, Cinder has dependencies on other OpenStack components. These components must be present and operate successfully in order for Cinder to do its job. In a troubleshooting scenario, you want to check these dependencies and confirm that they are up and running.

Keystone authentication problems

Cinder leverages Keystone to provide authentication and authorization services. If the Keystone service is not running, it shouldn't take long for you to see the result. If you run a cinder command, such as cinder list or cinder create without running Keystone, you will see an error like the one shown here:

In this case, you want to check and make sure that the Keystone service is up and running. Refer to Chapter 2, Troubleshooting OpenStack Identity, for details on how to make sure that Keystone is running successfully. Imagine a scenario where you have confirmed that Keystone is up and running and yet when you run a cinder command you receive an error...