Installation guide

Important

Although the Cluster Configuration Tool provides a Quorum Votes parameter in

the Properties dialog box of each cluster member, that parameter is intended only

for use during initial cluster configuration. Furthermore, it is recommended that you

retain the default Quorum Votes value of 1. For more information about using the

Cluster Configuration Tool, refer to Chapter 4, Configuring Red Hat Cluster With

system-config-cluster.

To edit the cluster configuration file, click the Cluster Configuration tab in the cluster configur-

ation GUI. Clicking the Cluster Configuration tab displays a graphical representation of the

cluster configuration. Change the configuration file according the the following steps:

1. Make changes to cluster elements (for example, create a service).

2. Propagate the updated configuration file throughout the cluster by clicking Send to Cluster.

Note

The Cluster Configuration Tool does not display the Send to Cluster button

if the cluster is new and has not been started yet, or if the node from which

you are running the Cluster Configuration Tool is not a member of the

cluster. If the Send to Cluster button is not displayed, you can still use the

Cluster Configuration Tool; however, you cannot propagate the configura-

tion. You can still save the configuration file. For information about using the

Cluster Configuration Tool for a new cluster configuration, refer to

Chapter 4, Configuring Red Hat Cluster With system-config-cluster.

3. Clicking Send to Cluster causes a Warning dialog box to be displayed. Click Yes to save

and propagate the configuration.

4. Clicking Yes causes an Information dialog box to be displayed, confirming that the current

configuration has been propagated to the cluster. Click OK.

5. Click the Cluster Management tab and verify that the changes have been propagated to

the cluster members.

4. Backing Up and Restoring the Cluster

Database

The Cluster Configuration Tool automatically retains backup copies of the three most recently

used configuration files (besides the currently used configuration file). Retaining the backup

copies is useful if the cluster does not function correctly because of misconfiguration and you

need to return to a previous working configuration.

4. Backing Up and Restoring the Cluster Database