Before Configuring A Red Hat Cluster; Compatible Hardware; Enabling Ip Ports; Enabling Ip Ports On Cluster Nodes - Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual

Chapter 2.

Before Configuring a Red Hat Cluster

This chapter describes tasks to perform and considerations to make before installing and configuring a
Red Hat Cluster, and consists of the following sections:
Section 2.1, "Compatible Hardware"
•
Section 2.2, "Enabling IP Ports"
•
Section 2.3, "Configuring ACPI For Use with Integrated Fence Devices"
•
Section 2.4, "Configuring max_luns"
•
Section 2.5, "Considerations for Using Quorum Disk"
•
Section 2.7, "Considerations for Using Conga"
•
Section 2.8, "General Configuration Considerations"
•

2.1. Compatible Hardware

Before configuring Red Hat Cluster software, make sure that your cluster uses appropriate hardware
(for example, supported fence devices, storage devices, and Fibre Channel switches). Refer to the
hardware configuration guidelines at
current hardware compatibility information.

2.2. Enabling IP Ports

Before deploying a Red Hat Cluster, you must enable certain IP ports on the cluster nodes and on
computers that run luci (the Conga user interface server). The following sections specify the IP ports
to be enabled and provide examples of iptables rules for enabling the ports:
Section 2.2.1, "Enabling IP Ports on Cluster Nodes"
•
Section 2.2.2, "Enabling IP Ports on Computers That Run luci"
•
Section 2.2.3, "Examples of iptables Rules"
•

2.2.1. Enabling IP Ports on Cluster Nodes

To allow Red Hat Cluster nodes to communicate with each other, you must enable the IP ports
assigned to certain Red Hat Cluster components.
Nodes"
lists the IP port numbers, their respective protocols, the components to which the port
numbers are assigned, and references to iptables rule examples. At each cluster node, enable
Table 2.1, "Enabled IP Ports on Red Hat Cluster
IP ports according to
Section 2.2.3, "Examples of iptables
IP Port Protocol
Number
6809 UDP
http://www.redhat.com/cluster_suite/hardware/
Rules".)
Component
cman (Cluster Manager), for use
in clusters with Distributed Lock
Manager (DLM) selected
Table 2.1, "Enabled IP Ports on Red Hat Cluster
Nodes". (All examples are in
Reference to Example of
iptables Rules
Example 2.1, "Port 6809: cman"
for the most
11