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OpenStack Essentials - Second Edition

By : Dan Radez

2.7 (3)

OpenStack Essentials

2.7 (3)

By: Dan Radez

Overview of this book

OpenStack is a widely popular platform for cloud computing. Applications that are built for this platform are resilient to failure and convenient to scale. This book, an update to our extremely popular OpenStack Essentials (published in May 2015) will help you master not only the essential bits, but will also examine the new features of the latest OpenStack release - Mitaka; showcasing how to put them to work straight away. This book begins with the installation and demonstration of the architecture. This book will tech you the core 8 topics of OpenStack. They are Keystone for Identity Management, Glance for Image management, Neutron for network management, Nova for instance management, Cinder for Block storage, Swift for Object storage, Ceilometer for Telemetry and Heat for Orchestration. Further more you will learn about launching and configuring Docker containers and also about scaling them horizontally. You will also learn about monitoring and Troubleshooting OpenStack.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. RDO Installation

1. RDO Installation

OpenStack architecture

Dashboard

Keystone

Glance

Neutron

Nova

Cinder

Swift

Ceilometer

Heat

OpenStack installation

Installing RDO using Packstack

Installing RDO using Triple-O

Connecting to your Overcloud

Summary

2. Identity Management

2. Identity Management

Services and endpoints

Interacting with Keystone in the dashboard

Endpoints in the dashboard

Summary

3. Image Management

3. Image Management

Glance as a registry of images

Using the web interface

Building an image

Summary

4. Network Management

4. Network Management

Networking and Neutron

Open vSwitch configuration

Creating a network

Web interface management

External network access

Web interface external network setup

Summary

5. Instance Management

5. Instance Management

Managing flavors

Managing key pairs

Launching an instance

Managing floating IP addresses

Managing security groups

Communicating with the instance

Launching an instance using the web interface

Summary

6. Block Storage

6. Block Storage

Use case

Creating and using block storage

Attaching the block storage to an instance

Managing Cinder volumes in the web interface

Backing storage

Ceph setup

Summary

7. Object Storage

7. Object Storage

Use case

Architecture of a Swift cluster

Creating and using object storage

Object file management in the web interface

Using object storage on an instance

Ring files

Summary

8. Telemetry

8. Telemetry

Understanding the data store

Definitions of Ceilometer's configuration terms

Graphing the data

Summary

9. Orchestration

9. Orchestration

About orchestration

Writing templates

The Heat Orchestration Template format

Launching a stack

Autoscaling instances with Heat

LBaaS setup

Web interface

Summary

10. Docker

10. Docker

Containers

OpenStack integration

Nova compute configuration

Glance configuration

Launching a Docker instance

Summary

11. Scaling Horizontally

11. Scaling Horizontally

Scaling compute nodes

Installing more control nodes

Load-balancing control services

High availability

Highly available database and message bus

Summary

12. Monitoring

12. Monitoring

Monitoring defined

Installing Nagios

Monitoring methods

Non-OpenStack service checks

Monitoring control services

Monitoring network services

Monitoring compute services

Summary

13. Troubleshooting

13. Troubleshooting

The OpenStack debug command-line option

Tailing the server logs

Troubleshooting Keystone and authentication

Troubleshooting Glance image management

Troubleshooting Neutron networking

Troubleshooting Nova launching instances

Troubleshooting post-boot metadata

Troubleshooting console access

Troubleshooting Cinder block storage

Troubleshooting Swift object storage

Troubleshooting Ceilometer Telemetry

Troubleshooting Heat orchestration

Getting more help

Summary

Index

Index

Troubleshooting Keystone and authentication

Nothing is more frustrating than not being able to log in to your cluster to see what is going on. Thankfully, OpenStack offers an authentication override to bypass authentication and allow you to make Keystone calls to see services, endpoints, and other Keystone resources. This is called using the Keystone admin service token. In Chapter 2, Identity Management, we looked at creating a keystonerc file. To use this service token to override authentication, you need to use a similar methodology.

Note

If you encounter trouble using your admin token to override authentication, check the file /usr/share/keystone/keystone-dist-paste.ini and look in the sections [pipeline:public_api], [pipeline:admin_api], and [pipeline:api_v3] for admin_token_auth. If the key admin_token_auth is missing then this method of authentication has been disabled.

Start by getting the current service token value from the keystone.conf file:

$ grep admin_token /etc/keystone/keystone...

Visually different images

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