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

Running Keystone under Eventlet

If you are running Keystone using the Eventlet-based process, you will use the keystone-all command to start the Keystone services. This command will start both the Service API and the Administration API in a single process.

Checking the Keystone service

You can confirm that Keystone was started successfully by running ps -aux | grep keystone, which should show you several keystone-all processes. The output should look similar to the following output:

You can also check this by running pgrep -l keystone. The output from this command should look similar to this output:

Checking the Keystone client

You can use the openstack client or the keystone command-line client to double check whether Keystone is running properly. Before you use the client, make sure that you have sourced the credentials in your openrc file or be prepared to pass the required auth attributes in with the command. If you forget to take one of these steps, you may see an error like the following...