Installation guide

Figure 1.6. Cluster Configuration Tool
The Cluster Configurat ion T ool represents cluster configuration components in the configuration file
(/etc/cluster/cluster.conf) with a hierarchical graphical display in the left panel. A triangle icon
to the left of a component name indicates that the component has one or more subordinate components
assigned to it. Clicking the triangle icon expands and collapses the portion of the tree below a
component. The components displayed in the GUI are summarized as follows:
Cluster Nodes — Displays cluster nodes. Nodes are represented by name as subordinate
elements under Cluster Nodes. Using configuration buttons at the bottom of the right frame (below
Properties), you can add nodes, delete nodes, edit node properties, and configure fencing
methods for each node.
Fence Devices — Displays fence devices. Fence devices are represented as subordinate
elements under Fence Devices. Using configuration buttons at the bottom of the right frame
(below Properties), you can add fence devices, delete fence devices, and edit fence-device
properties. Fence devices must be defined before you can configure fencing (with the Manage
Fencing For This Node button) for each node.
Managed Resources — Displays failover domains, resources, and services.
Failover Dom ains — For configuring one or more subsets of cluster nodes used to run a
high-availability service in the event of a node failure. Failover domains are represented as
subordinate elements under Failover Dom ains. Using configuration buttons at the bottom of
the right frame (below Properties), you can create failover domains (when Failover
Domains is selected) or edit failover domain properties (when a failover domain is selected).
Resources — For configuring shared resources to be used by high-availability services. Shared
Red Hat Enterprise Linux 4 Cluster Administration
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