Installation guide

Section 9.1:Setting up the JRE 145
9 Configuring and using the Red Hat
Cluster Manager GUI
Red Hat Cluster Manager includes a graphical user interface (GUI) which allows an administrator
to graphically monitor cluster status. The GUI does not allow configuration changes or management
of the cluster, however.
9.1 Setting up the JRE
The Red Hat Cluster Manager GUI can be run directly on a cluster member, or from a non-cluster
member to facilitate remote web based monitoring. The GUI itself is implemented as a java applet that
runs in a Web browser. For this reason, it is required that all systems on which the GUI is intended to
be run must have the Java Runtime Environment (JRE) installed and configured as a browser plug-in.
The cluster manager GUI can be run using either the IBM JRE or the Sun JRE.
WARNING
The IBM JRE is included and installed by default on Red Hat Linux
Advanced Server. The installation and use of the Sun JRE with Red Hat
Linux Advanced Server is not supported. The information in Section
9.1.2, Setting up the Sun JRE is provided only as a convenience to users
who wish to deploy it.
9.1.1 Setting up the IBM JRE
The IBM JRE is automatically installed on the cluster members in the IBMJava2-JRE-
1.3.
<version> RPM package (where <version> is the version of the IBM JRE currently
available). This package places the JRE in /opt/IBMJava2-13/.
The RPM installation of the JRE will automatically setup the required plugin link as required by the
Mozilla Web browser.
To enable the IBM JRE for usage with the Netscape Navigator version 4.x, follow the instruc-
tions supplied with the JRE. For example, as specified in /opt/IBMJava2-131/docs/README-
EN.JRE.HTML of IBM JRE v.1.3.1-3,the instructions specifiy the following commands:
cd /usr/lib/netscape/plugins
ln -s /opt/IBMJava2-131/jre/bin/javaplugin.so