Cluster Status Tool - Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual

Chapter 1. Red Hat Cluster Configuration and Management Overview
• 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 Domains — 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 Domains. 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
resources consist of file systems, IP addresses, NFS mounts and exports, and user-created
scripts that are available to any high-availability service in the cluster. Resources are represented
as subordinate elements under Resources. Using configuration buttons at the bottom of the
right frame (below Properties), you can create resources (when Resources is selected) or edit
resource properties (when a resource is selected).
Note
The Cluster Configuration Tool provides the capability to configure private
resources, also. A private resource is a resource that is configured for use with only
one service. You can configure a private resource within a Service component in the
GUI.
• Services — For creating and configuring high-availability services. A service is configured by
assigning resources (shared or private), assigning a failover domain, and defining a recovery
policy for the service. Services are represented as subordinate elements under Services. Using
configuration buttons at the bottom of the right frame (below Properties), you can create services
(when Services is selected) or edit service properties (when a service is selected).

1.3.2. Cluster Status Tool

You can access the Cluster Status Tool
Management tab in Cluster Administration GUI.
8
(Figure 1.7, "Cluster Status Tool") through the Cluster