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Applies to SUSE Linux Enterprise High Availability Extension 12 SP3

About This Guide Edit source

This guide is intended for administrators who need to set up, configure, and maintain clusters with SUSE® Linux Enterprise High Availability Extension. For quick and efficient configuration and administration, the High Availability Extension includes both a graphical user interface (GUI) and a command line interface (CLI). For performing key tasks, both approaches (GUI and CLI) are covered in detail in this guide. Thus, administrators can choose the appropriate tool that matches their needs.

This guide is divided into the following parts:

Installation, Setup and Upgrade

Before starting to install and configure your cluster, make yourself familiar with cluster fundamentals and architecture, get an overview of the key features and benefits. Learn which hardware and software requirements must be met and what preparations to take before executing the next steps. Perform the installation and basic setup of your HA cluster using YaST. Learn how to upgrade your cluster to the most recent release version or how to update individual packages.

Configuration and Administration

Add, configure and manage cluster resources with either the Web interface (Hawk2), or the command line interface (crmsh). To avoid unauthorized access to the cluster configuration, define roles and assign them to certain users for fine-grained control. Learn how to use load balancing and fencing. If you consider writing your own resource agents or modifying existing ones, get some background information on how to create different types of resource agents.

Storage and Data Replication

SUSE Linux Enterprise High Availability Extension ships with the cluster-aware file systems OCFS2 and GFS2, and the clustered Logical Volume Manager (cLVM). For replication of your data, use DRBD*. It lets you mirror the data of a High Availability service from the active node of a cluster to its standby node. Furthermore, a clustered Samba server also provides a High Availability solution for heterogeneous environments.

Appendix

Contains an overview of common problems and their solution. Presents the naming conventions used in this documentation with regard to clusters, resources and constraints. Shows the published documentation updates including a detailed list of the content changes for each update. Contains a glossary with HA-specific terminology.

Many chapters in this manual contain links to additional documentation resources. These include additional documentation that is available on the system as well as documentation available on the Internet.

For an overview of the documentation available for your product and the latest documentation updates, refer to http://www.suse.com/doc/.

1 Available Documentation Edit source

Note
Note: Online Documentation and Latest Updates

Documentation for our products is available at http://www.suse.com/documentation/, where you can also find the latest updates, and browse or download the documentation in various formats. The latest documentation updates can usually be found in the English language version.

In addition, the product documentation is usually available in your installed system under /usr/share/doc/manual.

The following documentation is available for this product:

Administration Guide

This guide is intended for administrators who need to set up, configure, and maintain clusters with SUSE® Linux Enterprise High Availability Extension. For quick and efficient configuration and administration, the High Availability Extension includes both a graphical user interface (GUI) and a command line interface (CLI). For performing key tasks, both approaches (GUI and CLI) are covered in detail in this guide. Thus, administrators can choose the appropriate tool that matches their needs.

Installation and Setup Quick Start

This document guides you through the setup of a very basic two-node cluster, using the bootstrap scripts provided by the ha-cluster-bootstrap package. This includes the configuration of a virtual IP address as a cluster resource and the use of SBD on shared storage as fencing mechanism.

Highly Available NFS Storage with DRBD and Pacemaker

This document describes how to set up highly available NFS storage in a two-node cluster, using the following components of SUSE Linux Enterprise High Availability Extension 12 SP3: DRBD* (Distributed Replicated Block Device), LVM (Logical Volume Manager), and Pacemaker, the cluster resource management framework.

Geo Clustering Quick Start

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.

2 Giving Feedback Edit source

Your feedback and contribution to this documentation is welcome! Several channels are available:

Service Requests and Support

For services and support options available for your product, refer to http://www.suse.com/support/.

To open a service request, you need a subscription at SUSE Customer Center. Go to https://scc.suse.com/support/requests, log in, and click Create New.

Bug Reports

Report issues with the documentation at https://bugzilla.suse.com/. To simplify this process, you can use the Report Documentation Bug links next to headlines in the HTML version of this document. These preselect the right product and category in Bugzilla and add a link to the current section. You can start typing your bug report right away. A Bugzilla account is required.

Contributions

To contribute to this documentation, use the Edit Source links next to headlines in the HTML version of this document. They take you to the source code on GitHub, where you can open a pull request. A GitHub account is required.

Mail

Alternatively, you can report errors and send feedback concerning the documentation to <>. Make sure to include the document title, the product version and the publication date of the documentation. Refer to the relevant section number and title (or include the URL) and provide a concise description of the problem.

3 Documentation Conventions Edit source

The following notices and typographical conventions are used in this documentation:

  • tux > command

    Commands that can be run by any user, including the root user.

  • root # command

    Commands that must be run with root privileges. Often you can also prefix these commands with the sudo command to run them.

  • /etc/passwd: directory names and file names

  • PLACEHOLDER: replace PLACEHOLDER with the actual value

  • PATH: the environment variable PATH

  • ls, --help: commands, options, and parameters

  • user: users or groups

  • packagename: name of a package

  • Alt, AltF1: a key to press or a key combination; keys are shown in uppercase as on a keyboard

  • File, File › Save As: menu items, buttons

  • amd64, em64t, ipf This paragraph is only relevant for the architectures amd64, em64t, and ipf. The arrows mark the beginning and the end of the text block.

  • Dancing Penguins (Chapter Penguins, ↑Another Manual): This is a reference to a chapter in another manual.

  • Notices

    Warning
    Warning

    Vital information you must be aware of before proceeding. Warns you about security issues, potential loss of data, damage to hardware, or physical hazards.

    Important
    Important

    Important information you should be aware of before proceeding.

    Note
    Note

    Additional information, for example about differences in software versions.

    Tip
    Tip

    Helpful information, like a guideline or a piece of practical advice.

For an overview of naming conventions with regard to cluster nodes and names, resources, and constraints, see Appendix B, Naming Conventions.

4 About the Making of This Documentation Edit source

This documentation is written in SUSEDoc, a subset of DocBook 5. The XML source files were validated by jing (see https://code.google.com/p/jing-trang/), processed by xsltproc, and converted into XSL-FO using a customized version of Norman Walsh's stylesheets. The final PDF is formatted through FOP from Apache Software Foundation. The open source tools and the environment used to build this documentation are provided by the DocBook Authoring and Publishing Suite (DAPS). The project's home page can be found at https://github.com/openSUSE/daps.

The XML source code of this documentation can be found at https://github.com/SUSE/doc-sleha.

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