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CentOS High Availability
Mitja Resman
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eBook - ePub
CentOS High Availability
Mitja Resman
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Information
Thema
Computer ScienceThema
Computer NetworkingCentOS High Availability
Table of Contents
CentOS High Availability
Credits
About the Author
About the Reviewers
www.PacktPub.com
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Free access for Packt account holders
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Downloading the example code
Errata
Piracy
Questions
1. Getting Started with High Availability
What is high availability?
System design
Computer clusters
High-availability solutions
Summary
2. Meet the Cluster Stack on CentOS
Cluster stack software
The cluster communication layer
The cluster messaging and membership service
Quorum
The cluster resource management layer
A theoretical cluster service example
Cluster stack on CentOS Linux
Preparing for cluster stack software installation
Summary
3. Cluster Stack Software on CentOS 6
Cluster infrastructure
Cluster operating system preparation
Installing and configuring Corosync
Installing and configuring CMAN
Installing and configuring RGManager
Summary
4. Resource Manager on CentOS 6
Working with RGManager
Configuring failover domains
Adding cluster resources and services
Resources
Services
Managing cluster services
Removing cluster resources and services
Summary
5. Playing with Cluster Nodes on CentOS 6
Adding a new cluster node
Removing a cluster node
Summary
6. Fencing on CentOS 6
Fencing
Fencing configuration
APC switch fencing
IPMI management board fencing
HP iLO management board fencing
Fencing test
Fence master node
Fence check
Fence node
Summary
7. Testing Failover on CentOS 6
Hardware failure
Network failure
Summary
8. Two-node Cluster Considerations on CentOS 6
Quorum in a two-node cluster
Two-node cluster configuration
Quorum disk
Summary
9. Cluster Stack Software on CentOS 7
Cluster infrastructure
Cluster operating system preparation
Network configuration
NTP configuration
DNS configuration
Installing and configuring Corosync
Installing and configuring Pacemaker
Summary
10. Resource Manager on CentOS 7
Working with pcs
Adding cluster resources, constraints, and resource groups
Configuring resources
Configuring resource constraints
Configuring resource groups
Managing resources
Moving resources around
Stopping resources
Starting resources
Banning resources
Clearing resource constraints
Removing cluster constraints, resource groups, and resources
Removing resource constraints
Removing resource groups
Removing resources
Summary
11. Playing with Cluster Nodes on CentOS 7
Adding a new cluster node
Cluster node standby mode
Removing a cluster node
Summary
12. STONITH on CentOS 7
Fencing
Configuring fence devices
APC switch fencing
IPMI management board fencing
HP iLO management board fencing
Fence test
Summary
13. Testing Failover on CentOS 7
Hardware failure
Network failure
Summary
14. Two-node Cluster Considerations on CentOS 7
Quorum in a two-node cluster
Two-node cluster configuration
Summary
Index
CentOS High Availability
Copyright © 2015 Packt Publishing
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, without the prior written permission of the publisher, except in the case of brief quotations embedded in critical articles or reviews.
Every effort has been made in the preparation of this book to ensure the accuracy of the information presented. However, the information contained in this book is sold without warranty, either express or implied. Neither the author nor Packt Publishing, and its dealers and distributors will be held liable for any damages caused or alleged to be caused directly or indirectly by this book.
Packt Publishing has endeavored to provide trademark information about all of the companies and products mentioned in this book by the appropriate use of capitals. However, Packt Publishing cannot guarantee the accuracy of this information.
First published: April 2015
Production reference: 1220415
Published by Packt Publishing Ltd.
Livery Place
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Birmingham B3 2PB, UK.
ISBN 978-1-78528-248-5
www.packtpub.com
Credits
Author
Mitja Resman
Reviewers
Denis Fateyev
Christophe Grenier
Commissioning Editor
Veena Pagare
Acquisition Editor
Reshma Raman
Content Development Editor
Neeshma Ramakrishnan
Technical Editor
Abhishek R. Kotian
Copy Editor
Vikrant Phadke
Project Coordinator
Danuta Jones
Proofreaders
Stephen Copestake
Safis Editing
Paul Hindle
Indexer
Rekha Nair
Production Coordinator
Melwyn D'sa
Cover Work
Melwyn D'sa
About the Author
Mitja Resman hails from a small, beautiful country called Slovenia in south-central Europe. He is a fan of Linux and also an open source enthusiast. He is a Red Hat Certified Engineer and Linux Professional Institute professional. Working as a system administrator, Mitja gained years of professional experience with open source software and Linux system administration on local and international projects. The Swiss Army Knife syndrome makes him an expert in the field of VMware virtualization, Microsoft system administration, and more recently, Android system administration.
Mitja has a strong desire to lea...