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CentOS High Availability

You're reading from CentOS High Availability

Product type Book

Published in Apr 2015

Publisher

ISBN-13 9781785282485

Pages 174 pages

Edition 1st Edition

Languages

Concepts

High Performance Programming

Table of Contents (21) Chapters

CentOS High Availability

Credits

About the Author

About the Reviewers

www.PacktPub.com

Preface

1. Getting Started with High Availability

2. Meet the Cluster Stack on CentOS

3. Cluster Stack Software on CentOS 6

4. Resource Manager on CentOS 6

5. Playing with Cluster Nodes on CentOS 6

6. Fencing on CentOS 6

7. Testing Failover on CentOS 6

8. Two-node Cluster Considerations on CentOS 6

9. Cluster Stack Software on CentOS 7

10. Resource Manager on CentOS 7

11. Playing with Cluster Nodes on CentOS 7

12. STONITH on CentOS 7

13. Testing Failover on CentOS 7

14. Two-node Cluster Considerations on CentOS 7

Index

A theoretical cluster service example

In order to make it easy for you to understand the cluster service, you will be presented with a theoretical example of a two-node active/passive computer cluster providing a website cluster service. The active/passive cluster configuration only provides operational cluster services on the master cluster member at a given time, while the secondary cluster member waits on standby to take over if there is a master node failure. If the currently active cluster member fails, the cluster resources will be relocated and recovered on the operational secondary cluster member.

The following resources are required to run a simple website:

IP address—web server
Database server
Shared storage solution

All the listed resources must be installed and configured on the cluster node operating system and also added to the cluster resource manager configuration. In this way, the cluster resource manager is able to manage the resources and provide failover capabilities. The...

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