Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying CentOS High Availability
  • Table Of Contents Toc
CentOS High Availability

CentOS High Availability

By : Resman
4.5 (12)
Buy this Book
close
close
CentOS High Availability

CentOS High Availability

4.5 (12)
By: Resman
Buy this Book

Overview of this book

This book is targeted at system engineers and system administrators who want to upgrade their knowledge and skills in high availability and want to learn practically how to achieve high availability with CentOS Linux. You are expected to have good CentOS Linux knowledge and basic networking experience.
Table of Contents (16 chapters)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
1. Getting Started with High Availability
Icon
1. Getting Started with High Availability
Icon
What is high availability?
Icon
System design
Icon
Computer clusters
Icon
High-availability solutions
Icon
Summary
2
2. Meet the Cluster Stack on CentOS
Icon
2. Meet the Cluster Stack on CentOS
Icon
Cluster stack software
Icon
The cluster communication layer
Icon
The cluster resource management layer
Icon
A theoretical cluster service example
Icon
Cluster stack on CentOS Linux
Icon
Preparing for cluster stack software installation
Icon
Summary
3
3. Cluster Stack Software on CentOS 6
chevron up
Icon
3. Cluster Stack Software on CentOS 6
Icon
Cluster infrastructure
Icon
Cluster operating system preparation
Icon
Installing and configuring Corosync
Icon
Installing and configuring CMAN
Icon
Summary
4
4. Resource Manager on CentOS 6
Icon
4. Resource Manager on CentOS 6
Icon
Working with RGManager
Icon
Configuring failover domains
Icon
Adding cluster resources and services
Icon
Managing cluster services
Icon
Removing cluster resources and services
Icon
Summary
5
5. Playing with Cluster Nodes on CentOS 6
Icon
5. Playing with Cluster Nodes on CentOS 6
Icon
Adding a new cluster node
Icon
Removing a cluster node
Icon
Summary
6
6. Fencing on CentOS 6
Icon
6. Fencing on CentOS 6
Icon
Fencing
Icon
Fencing configuration
Icon
IPMI management board fencing
Icon
HP iLO management board fencing
Icon
Fencing test
Icon
Summary
7
7. Testing Failover on CentOS 6
Icon
7. Testing Failover on CentOS 6
Icon
Hardware failure
Icon
Network failure
Icon
Summary
8
8. Two-node Cluster Considerations on CentOS 6
Icon
8. Two-node Cluster Considerations on CentOS 6
Icon
Quorum in a two-node cluster
Icon
Two-node cluster configuration
Icon
Quorum disk
Icon
Summary
9
9. Cluster Stack Software on CentOS 7
Icon
9. Cluster Stack Software on CentOS 7
Icon
Cluster infrastructure
Icon
Installing and configuring Corosync
Icon
Summary
10
10. Resource Manager on CentOS 7
Icon
10. Resource Manager on CentOS 7
Icon
Working with pcs
Icon
Adding cluster resources, constraints, and resource groups
Icon
Managing resources
Icon
Removing cluster constraints, resource groups, and resources
Icon
Summary
11
11. Playing with Cluster Nodes on CentOS 7
Icon
11. Playing with Cluster Nodes on CentOS 7
Icon
Adding a new cluster node
Icon
Cluster node standby mode
Icon
Removing a cluster node
Icon
Summary
12
12. STONITH on CentOS 7
Icon
12. STONITH on CentOS 7
Icon
Fencing
Icon
Configuring fence devices
Icon
IPMI management board fencing
Icon
HP iLO management board fencing
Icon
Fence test
Icon
Summary
13
13. Testing Failover on CentOS 7
Icon
13. Testing Failover on CentOS 7
Icon
Hardware failure
Icon
Network failure
Icon
Summary
14
14. Two-node Cluster Considerations on CentOS 7
Icon
14. Two-node Cluster Considerations on CentOS 7
Icon
Quorum in a two-node cluster
Icon
Two-node cluster configuration
Icon
Summary
15
Index
Icon
Index

Installing and configuring Corosync

Let's get down to business now. You must configure IPtables to allow cluster communication traffic among cluster nodes. You must add an iptables rule to allow UDP traffic on 5404 and 5405, and another rule to allow multicast traffic communication. In this screenshot, you can see the commands to use for the iptables configuration:

Installing and configuring Corosync

Note

The default Corosync cluster communication ports are 5404 and 5405, and the UDP protocol is used. The ports are configured in the /etc/corosync/corosync.conf configuration file. If you want to change the default Corosync communication ports, make sure you change iptables accordingly.

Once you've run the commands, save the iptables configuration. In the following screenshot, you can see the command used to save the iptables configuration:

Installing and configuring Corosync

Note

You must add the IPTables rules and save the IPTables configuration on all cluster nodes. Then continue to install Corosync.

In this screenshot, you can see the command used to...

Visually different images
CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
CentOS High Availability
End of Section 3
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon