Specifications

Using LifeKeeper for Linux

The following topics provide detailed information on the LifeKeeper graphical user interface (GUI) as

well as the many tasks that can be performed within the LifeKeeper GUI.

GUI

The GUI components should have already been installed as part of the LifeKeeper Core installation.

The LifeKeeper GUI uses Java technology to provide a graphical user interface to LifeKeeper and its

configuration data. Since the LifeKeeper GUI is a client/server application, a user will run the

graphical user interface on a client system in order to monitor or administer a server system where

LifeKeeper is running. The client and the server components may or may not be on the same system.

GUI Overview - General

The GUI allows users working on any machine to administer, operate or monitor servers and

resources in any cluster as long as they have the required group memberships on the cluster

machines. (For details, see Configuring GUI Users.) The GUI Server and Client components are

described below.

GUI Server

The GUI server by default is not initialized on each LifeKeeper server at system startup. The GUI

server communicates with GUI clients using Hypertext Transfer Protocol (HTTP) and Remote

Method Invocation (RMI). By default, the GUI server is not initialized during LifeKeeper startup but

can be configured to start with the core LifeKeeper process. See Starting/Stopping the GUI Server.

GUI Client

The GUI client can be run either as an application on any LifeKeeper server or as a web client on any

Java-enabled system.

The client includes the following components:

l The status table on the upper left displays the high level status of connected servers and their

resources.

l The properties panel on the upper right displays detailed information about the most recently

selected status table object.

l The output panel on the bottom displays command output.

l The message bar at the very bottom of the window displays processing status messages.

l The context (in the properties panel) and global toolbars provide fast access to frequently used

146User Guide