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

Ceilometer dependencies

Ceilometer has a few external dependencies that troubleshooters need to be familiar with. Like the other OpenStack services, Ceilometer makes heavy use of the message broker. In most installations, the message broker will be RabbitMQ. Ceilometer will read events and notifications from the message queue, and translate that data into meters. In addition, Ceilometer relies on a database to store all the meters, events, notifications, and so on. The recommended database for Ceilometer is MongoDB. Ceilometer introduces the MongoDB noSQL database, while most other OpenStack projects use a relational database, such as MySQL. When troubleshooting Ceilometer, you want to make sure that each of these dependencies are in good working order.

The message broker

During the Ceilometer installation process, you will need to make sure that RabbitMQ, or another message broker, is installed and configured properly. The configuration for the message broker can be found in Ceilometer's...