The database and the message bus are not necessarily OpenStack services, but they are services that OpenStack depends on and that you want to be sure are highly available too. One option to make the database highly available is to add it to Pacemaker with a shared storage device. If the database were to fail on a node, then Pacemaker would move the shared storage to another node and start the database on a different node. There are also active/passive and active/active replication scenarios that can be configured for the database. Active/passive means that there is more than one instance of the database running, but only one of them is used as the active writable instance. The other instance(s) are there as passive backups and only become active if the current active instance needs to fail over for some reason. Active/active means that there is more than one active writable instance of the database. These are running on different nodes and each can...
OpenStack Essentials - Second Edition
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OpenStack Essentials - Second Edition
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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.
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OpenStack Essentials - Second Edition
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Table of Contents (20 chapters)
OpenStack Essentials Second Edition
Credits
About the Author
About the Reviewer
www.PacktPub.com
Preface
Free Chapter
RDO Installation
Identity Management
Image Management
Network Management
Instance Management
Block Storage
Object Storage
Telemetry
Orchestration
Docker
Scaling Horizontally
Monitoring
Troubleshooting
Index
Customer Reviews