|Red Hat Cluster Suite: Configuring and Managing a Cluster|
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The following changes to Red Hat Cluster enable running it with Red Hat GFS in RHEL-U3:
The Cluster Configuration Tool has been changed. After entering members in the configuration section of the application, if a member is highlighted, and you click Add Child, a dialog box is displayed, offering fence method options. You can select a fence method by clicking a radio button next to the fence method in the dialog box. Earlier Red Hat Cluster releases provided only two fence method options (under Power Controller Type): Serial and Network. For Red Hat Enterprise Linux 3 Update 3, if Red Hat GFS is installed on the node, then a third fence-method option, GULM-STONITH (the gulm-bridge fence method), is available.
The Red Hat Cluster Manager now provides support for GULM-STONITH, the gulm-bridge fence method.
A druid application, the GFS Setup Druid, provides for configuring an initial instance of Red Hat GFS by writing the three Red Hat GFS configuration files: cluster.ccs, nodes.ccs, and fence.ccs. The GFS Setup Druid requires an /etc/cluster.xml file when started.