Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2
Release Notes #
Geo Clustering for SUSE Linux Enterprise High Availability is a suite of clustering technologies that enable enterprises to implement highly available Linux clusters and eliminate single points of failure. This document gives an overview of features of Geo Clustering for SUSE Linux Enterprise High Availability and their limitations. Some sections do not apply to a particular architecture or product, this is explicitly marked.
Manuals can be found in the docu directory of the
installation media for SUSE Linux Enterprise High Availability
Extension 12 SP2. Any documentation (if installed) can be found in the
/usr/share/doc/ directory of the installed system.
- 1 Geo Clustering for SUSE Linux Enterprise High Availability
- 2 What Is New?
- 3 Supported Deployment Scenarios of Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2
- 4 Support Statement for Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2
- 5 Cluster
- 6 Storage
- 7 How to Obtain Source Code
- 8 More Information and Feedback
1 Geo Clustering for SUSE Linux Enterprise High Availability #
Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2 extends the support of SUSE Linux Enterprise High Availability Extension 12 SP2 for the use case of multi-site geographically resilient clusters.
Used with SUSE Linux Enterprise Server 12 SP2 and SUSE Linux Enterprise High Availability Extension 12 SP2, it helps firms maintain business continuity, protect data integrity, and reduce unplanned downtime for their mission-critical Linux workloads.
2 What Is New? #
- IP Relocation Resource Agent
Switch DNS/network to backup data center in case of a fail-over.
- Geo Cluster Status
Hawk displays the status of a Geo Cluster for easier access and monitoring.
- Arbitrator
Multi-tenancy booth arbitrator for managing multiple Geo clusters.
- Configuration Replication Between Geo Sites
Configuration replication between Geo sites reduces manual admin work while keeping track of configuration changes.
Make sure to also review the release notes for the following base products:
SUSE Linux Enterprise Server 12 SP2: https://www.suse.com/releasenotes/x86_64/SUSE-SLES/12-SP2/
SUSE Linux Enterprise High Availability Extension 12 SP2: https://www.suse.com/releasenotes/x86_64/SLE-HA/12-SP2/
2.1 Documentation for SLE HA 12 SP2 and SLE HA GEO 12 SP2 #
The documentation for this product has been extended. Some manuals are only available online.
The new Installation and Setup Quick Start guides you through the setup of a very basic two-node cluster.
The Geo Clustering Quick Start explains how to set up an example scenario with a two-site Geo cluster, one arbitrator, and data replication via DRBD.
Both Quick Starts are available on the installation media and online.
The comprehensive Administration Guide has been removed from the installation media, but is available online. Find the complete documentation for this product at https://www.suse.com/documentation/sle-ha-12/ (https://www.suse.com/documentation/sle-ha-12/).
3 Supported Deployment Scenarios of Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2 #
See the release notes of SUSE Linux Enterprise High Availability Extension 12 SP2 for the discussion of which scenarios require Geo Clustering for SUSE Linux Enterprise High Availability 12.
4 Support Statement for Geo Clustering for SUSE Linux Enterprise High Availability 12 SP2 #
Support requires an appropriate subscription from SUSE. For more information, see: http://www.suse.com/products/server/.
General Support Statement
The following definitions apply:
L1: Installation and problem determination - technical support designed to provide compatibility information, installation and configuration assistance, usage support, on-going maintenance and basic troubleshooting. Level 1 Support is not intended to correct product defect errors.
L2: Reproduction of problem isolation - technical support designed to duplicate customer problems, isolate problem areas and potential issues, and provide resolution for problems not resolved by Level 1 Support.
L3: Code Debugging and problem resolution - technical support designed to resolve complex problems by engaging engineering in patch provision, resolution of product defects which have been identified by Level 2 Support.
SUSE will only support the usage of original (unchanged or not recompiled) packages.
5 Cluster #
5.1 Support for Multiple Test Scripts (before-acquire-handler) #
Booth can currently invoke only one external script to check whether granting/keeping the ticket is advisable. Often, it would be helpful if there were support for multiple checks, such as for cluster state, data center connectivity, and air conditioning.
You can now create a directory with multiple scripts which are then run
in alphabetical order. For the ticket to be granted or renewed, all
scripts must succeed. The semantics are otherwise exactly the same as in
the case of a single script (before-acquire-handler).
5.2 Support for Geo Attributes in booth #
Sometimes, additional information may be required before deciding whether to start an application. This information needs to be transferred between sites.
SLE HA Geo 12 SP2 now provides support for setting and retrieving
attributes in a Geo cluster. Attributes are set directly at the site
using booth for transfer. Every attribute is tied to
a ticket. The program geostore is used to manage or
retrieve attributes. For more information, see man 8
geostore.
6 Storage #
6.1 Data Synchronization Across Geo Clusters Using Stacked DRBD devices #
Geo clusters need to synchronize data between sites, where each site is a separate cluster.
Data synchronization between clusters is supported using stacked DRBD devices: Each cluster has a two-node DRBD device and another DRBD device is layered on top. For more information about configuring the stacked DRBD device, see "Geo Clustering Quick Start", Section "Setting Up DRBD".
7 How to Obtain Source Code #
This SUSE product includes materials licensed to SUSE under the GNU General Public License (GPL). The GPL requires SUSE to provide the source code that corresponds to the GPL-licensed material. The source code is available for download at http://www.suse.com/download-linux/source-code.html. Also, for up to three years after distribution of the SUSE product, upon request, SUSE will mail a copy of the source code. Requests should be sent by e-mail to mailto:sle_source_request@suse.com or as otherwise instructed at http://www.suse.com/download-linux/source-code.html. SUSE may charge a reasonable fee to recover distribution costs.
8 More Information and Feedback #
Read the READMEs on the media.
Get detailed changelog information about a particular package from the RPM (where FILENAME is the name of the RPM):
rpm --changelog -qp FILENAME.rpm
Check the
ChangeLogfile in the top level of first medium for a chronological log of all changes made to the updated packages.Find more information in the
docudirectory of first medium of the Geo Clustering for SUSE Linux Enterprise High Availability media. This directory includes a PDF version of the High Availability Guide.http://www.suse.com/documentation/sle_ha/ contains additional or updated documentation for Geo Clustering for SUSE Linux Enterprise High Availability.
Visit http://www.suse.com/products/ for the latest product news from SUSE and http://www.suse.com/download-linux/source-code.html for additional information on the source code of SUSE Linux Enterprise products.
Copyright © 2010- 2016 SUSE LLC.
Thanks for using Geo Clustering for SUSE Linux Enterprise High Availability in your business.
The SUSE Linux Enterprise High Availability Extension Team.