Installation guide

Chapter 2. Before Configuring the Red Hat High Availability Add-
On
This chapter describes tasks to perform and considerations to make before installing and
configuring the Red Hat High Availability Add-On, and consists of the following sections.
Important
Make sure that your deployment of Red Hat High Availability Add-On meets your needs and
can be supported. Consult with an authorized Red Hat representative to verify your
configuration prior to deployment. In addition, allow time for a configuration burn-in period to
test failure modes.
Section 2.1, “ General Configuration Considerations”
Section 2.2, “ Compatible Hardware”
Section 2.3, “ Enabling IP Ports”
Section 2.4, “ Configuring lu ci with /etc/sysco nfi g /l uci ”
Section 2.5, “ Configuring ACPI For Use with Integrated Fence Devices”
Section 2.6, “ Considerations for Configuring HA Services”
Section 2.7, “ Configuration Validation”
Section 2.8, “ Considerations for Net wo rkMan ag er”
Section 2.9, “ Considerations for Using Quorum Disk”
Section 2.10, “Red Hat High Availability Add-On and SELinux”
Section 2.11, “ Multicast Addresses”
Section 2.12, “UDP Unicast Traffic”
Section 2.13, “Considerations for ri cci ”
Section 2.14, “ Configuring Virtual Machines in a Clustered Environment”
2.1. General Configurat ion Considerat ions
You can configure the Red Hat High Availability Add-On in a variety of ways to suit your needs. Take
into account the following general considerations when you plan, configure, and implement your
deployment.
Nu mber o f clu st er n o d es su p p o rt ed
The maximum number of cluster nodes supported by the High Availability Add-On is 16.
Sin g le sit e clu st ers
Red Hat Ent erprise Linux 6 Clust er Administ rat ion
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