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 5. Troubleshooting OpenStack Compute

Nova is one of the central services of OpenStack, and it is also one of the largest in terms of lines of code. It's also worth noting that Nova is one of the oldest OpenStack projects, and it has seen a lot of changes and development over the years. Nova leverages and interacts with many of the other OpenStack services. As a result, isolating and troubleshooting problems with Nova can be challenging, but in this chapter, we will give you the necessary tips to be successful.

When troubleshooting Nova, it helps to follow a series of steps as you seek to isolate the problems you may encounter. In this chapter, we will work through each of the following topics step by step as we troubleshoot Nova:

  • Checking the services

  • Checking the database

  • Checking the authentication settings

  • Checking the Glance integration

  • Checking the Neutron integration