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


The OpenStack telemetry service is similar to other services when it comes to troubleshooting. A wise course of action is to check the various Ceilometer processes that we discussed in the previous sections. You will also want to confirm the successful operation of your message bus, of which Ceilometer will make heavy use. One unique dependency introduced by Ceilometer is the MongoDB database. You can confirm successful configuration and operation of Mongo using the tips discussed in this chapter. It is also worth noting that each service that you want to use with Ceilometer will need to be configured to send its metering data to Ceilometer. Finally, the Ceilometer command-line tool comes with several useful commands that can be leveraged when troubleshooting OpenStack telemetry as well as most of the other OpenStack services. In the next chapter, we will explore some tips to avoid emergency troubleshooting by watching our cluster's performance availability and reliability.