Configuring Cluster Monitoring Parameters - Red Hat CLUSTER MANAGER - INSTALLATION AND Administration Manual

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9.1.2 Setting up the Sun JRE
If the cluster GUI is to be installed on a non-cluster member, it may be necessary to download and
install the JRE. The JRE can be obtained from Sun's java.sun.com site. For example, at the time of
publication, the specific page is http://java.sun.com/j2se/1.3/jre/download-linux.html
After downloading the JRE, run the downloaded program (for example, j2re-1_3_1_02-linux-
i386-rpm.bin) and confirm the license agreement. This results in the extraction of the JRE's RPM,
jre-1.3.1_02.i386.rpm, which is installed using rpm.
After installing the JRE, enable the browser that is intended to run the GUI applet with Java support.
The procedure needed to enable java support is dependent on the specific browser and browser version
used. Refer to the installation instructions for java plugins found on the JRE download page.
For example, to enable java for usage with release 4 of Netscape Navigator/Communicator, add
the following in the ~/.bash_profile file:
export NPX_PLUGIN_PATH=/usr/java/jre1.3.1_02/plugin/i386/ns4:/usr/lib/netscape/plugins
The specific directory path may vary. Also, note that the JRE's installation instructions are different
for release 6 of Netscape Communicator.
The following example describes the setup step necessary to configure the Mozilla browser to enable
the java plugin:
ln -s /usr/java/jre1.3.1_02/plugin/i386/ns600/libjavaplugin_oji.so \
/usr/lib/mozilla/plugins/

9.2 Configuring Cluster Monitoring Parameters

When the cluconfig utility is run to configure the cluster, it will prompt for configuration information
which relates to operation of the Cluster Manager GUI.
The first GUI related parameter asks whether or not to configure a cluster alias. For example:
Enter IP address for cluster alias [NONE]: 172.16.33.128
A cluster alias consists of a floating IP address which will be active on either of the cluster members.
For the purposes of this example, the IP is set to 172.16.33.128. It is useful to use this IP address (or
associated hostname) within the browser when pointing it at the cluster member to monitor. If electing
not to configure a cluster alias, then it is required to designate individual cluster members in order to
monitor the cluster status using the GUI. The benefit of specifying the cluster alias is that the GUI will
continue to be responsive as long as at least one cluster member is active.
The second GUI related parameter prompted for in cluconfig asks whether or not to allow remote
monitoring. For example:
Chapter 9:Configuring and using the Red Hat Cluster Manager GUI