Exploring the Concepts, Components, and Features of a RHEL High Availability Cluster

Contents

Overview

Applicable Environments

• Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add-On

Useful References and Guides

• Design guides for RHEL High Availability clusters
• This content is not included.Deployment examples for RHEL High Availability clusters
• Support policies for RHEL High Availability clusters

Explore

General Cluster Layout and Components

Components

• corosync
• pacemaker

Membership and Quorum

Concepts

• Quorum

Components

• corosync-qdevice and corosync-qnetd

Network Communications

Features

• Member communication and heartbeat monitoring
• Transport protocols

STONITH/Fencing

Concepts

• Fencing/STONITH

Components

• sbd and fence_sbd