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Abstract
This document provides a step-by-step guide to building a simple high-availability cluster using Pacemaker.
The example cluster will use:
CentOS 7.5 as the host operating system
Corosync to provide messaging and membership services,
Pacemaker 1.1.18
DRBD as a cost-effective alternative to shared storage,
GFS2 as the cluster filesystem (in active/active mode)
Given the graphical nature of the install process, a number of screenshots are included. However the guide is primarily composed of commands, the reasons for executing them and their expected outputs.
