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Applies to SUSE Linux Enterprise High Availability Extension 11 SP4

Part IV Appendix

20 Troubleshooting

Strange problems may occur that are not easy to understand, especially when starting to experiment with High Availability. However, there are several utilities that allow you to take a closer look at the High Availability internal processes. This chapter recommends various solutions.

A Naming Conventions

This guide uses the following naming conventions for cluster nodes and names, cluster resources, and constraints.

B Example of Setting Up a Simple Testing Resource

This chapter provides a basic example for the configuration of a simple resource: an IP address. It demonstrates both approaches to do so, using either the Pacemaker GUI or the crm command line tool.

C Example Configuration for OCFS2 and cLVM

The following is an example configuration that can help you setting up your resources for use of either OCFS2, cLVM, or both. The configuration below does not represent a complete cluster configuration but is only an extract, including all resources needed for OCFS2 and cLVM, and ignoring any other …

D Cluster Management Tools

High Availability Extension ships with a comprehensive set of tools to assists you in managing your cluster from the command line. This chapter introduces the tools needed for managing the cluster configuration in the CIB and the cluster resources. Other command line tools for managing resource agen…

E Upgrading Your Cluster and Updating Software Packages

This chapter covers two different scenarios: upgrading a cluster to another version of SUSE® Linux Enterprise High Availability Extension (either a major release or a service pack) as opposed to updating individual packages on cluster nodes.

F What's New?

The most important software modifications from version to version are outlined in the following sections. This summary indicates, for example, whether basic settings have been completely reconfigured, configuration files have been moved to other places, or other significant changes happened.

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