Red Hat ENTERPRISE LINUX 5 - ADMINISTRATION Manual

Also see for ENTERPRISE LINUX 5 - VIRTUAL SERVER ADMINISTRATION: Tuning guide Configuration guide Configuration guide Manual Use manual

Contents

Chapter 1. Red Hat Cluster Configuration and Management Overview8• Fence Devices — Displays fence devices. Fence devices are represented as subordinateelements under Fence Devices. Using configuration buttons at the bottom of the right frame (belowProperties), 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 ForThis 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 subordinateelements 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 editfailover domain properties (when a failover domain is selected).• Resources — For configuring shared resources to be used by high-availability services. Sharedresources consist of file systems, IP addresses, NFS mounts and exports, and user-createdscripts that are available to any high-availability service in the cluster. Resources are representedas subordinate elements under Resources. Using configuration buttons at the bottom of theright frame (below Properties), you can create resources (when Resources is selected) or editresource properties (when a resource is selected).NoteThe Cluster Configuration Tool provides the capability to configure privateresources, also. A private resource is a resource that is configured for use with onlyone service. You can configure a private resource within a Service component in theGUI.• Services — For creating and configuring high-availability services. A service is configured byassigning resources (shared or private), assigning a failover domain, and defining a recoverypolicy for the service. Services are represented as subordinate elements under Services. Usingconfiguration 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 ToolYou can access the Cluster Status Tool (Figure 1.7, “Cluster Status Tool”) through the ClusterManagement tab in Cluster Administration GUI.