SUSE Linux Enterprise High Availability Extension 12 SP5

Geo Clustering Guide #

Abstract#

Geo clustering allows you to have multiple, geographically dispersed sites with a local cluster each. Failover between these clusters is coordinated by a higher level entity: the booth cluster ticket manager. This document explains in detail the setup options and parameters for booth, the Csync2 setup for Geo clusters, how to configure the cluster resources and how to transfer them to other cluster site in case of changes. It also describes how to manage Geo clusters from command line and with Hawk and how to upgrade them to the latest product version.

Authors: Tanja Roth and Thomas Schraitle

Publication Date: 12/12/2024

1 Challenges for Geo Clusters

2 Conceptual Overview

3 Requirements

4 Setting Up the Booth Services

4.1 Booth Configuration and Setup Options
4.2 Using the Default Booth Setup
4.3 Using a Multi-Tenant Booth Setup
4.4 Synchronizing the Booth Configuration to All Sites and Arbitrators
4.5 Enabling and Starting the Booth Services
4.6 Reconfiguring Booth While Running

5 Synchronizing Configuration Files Across All Sites and Arbitrators

5.1 Csync2 Setup for Geo Clusters
5.2 Synchronizing Changes with Csync2

6 Configuring Cluster Resources and Constraints

6.1 Configuring Ticket Dependencies of Resources
6.2 Configuring a Resource Group for boothd
6.3 Adding an Ordering Constraint
6.4 Transferring the Resource Configuration to Other Cluster Sites

7 Setting Up IP Relocation via DNS Update

8 Managing Geo Clusters

8.1 Managing Tickets From Command Line
8.2 Managing Tickets With Hawk2

9 Troubleshooting

10 Upgrading to the Latest Product Version

10.1 Offline Migration (New Booth Mechanism)
10.2 Cluster Node and Arbitrator Upgrade

11 For More Information

A GNU Licenses

A.1 GNU Free Documentation License

List of Figures

2.1 Two-Site Cluster (2x2 Nodes + Arbitrator)
4.1 Example Ticket Dependency
5.1 Example Csync2 Setup for Geo Clusters
8.1 Hawk2—Ticket Details
8.2 Hawk2 Simulator—Tickets

List of Tables

10.1 Supported Upgrade Paths for SLE HA and SLE HA Geo

List of Examples

4.1 A Booth Configuration File
4.2 /etc/booth/apac.conf
4.3 /etc/booth/emea.conf
7.1 Resource Configuration for Dynamic DNS Update

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All information found in this book has been compiled with utmost attention to detail. However, this does not guarantee complete accuracy. Neither SUSE LLC, its affiliates, the authors nor the translators shall be held liable for possible errors or the consequences thereof.

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