3.5. Naming The Cluster
Naming the cluster consists of specifying a cluster name, a configuration version (optional), and values for Post-Join Delay and Post-Fail Delay. Name the cluster as follows:
At the left frame, click Cluster.
At the bottom of the right frame (labeled Properties), click the Edit Cluster Properties button. Clicking that button causes a Cluster Properties dialog box to be displayed. The Cluster Properties dialog box presents text boxes for Name, Config Version, and two Fence Daemon Properties parameters: Post-Join Delay and Post-Fail Delay.
At the Name text box, specify a name for the cluster. The name should be descriptive enough to distinguish it from other clusters and systems on your network (for example, nfs_cluster or httpd_cluster). The cluster name cannot exceed 15 characters.
Tip Choose the cluster name carefully. The only way to change the name of a Red Hat cluster is to create a new cluster configuration with the new name.
(Optional) The Config Version value is set to 1 by default and is automatically incremented each time you save your cluster configuration. However, if you need to set it to another value, you can specify it at the Config Version text box.
Specify the Fence Daemon Properties parameters: Post-Join Delay and Post-Fail Delay.
The Post-Join Delay parameter is the number of seconds the fence daemon (fenced) waits before fencing a node after the node joins the fence domain. The Post-Join Delay default value is 3. A typical setting for Post-Join Delay is between 20 and 30 seconds, but can vary according to cluster and network performance.
The Post-Fail Delay parameter is the number of seconds the fence daemon (fenced) waits before fencing a node (a member of the fence domain) after the node has failed. The Post-Fail Delay default value is 0. Its value may be varied to suit cluster and network performance.
Note For more information about Post-Join Delay and Post-Fail Delay, refer to the fenced(8) man page.
Save cluster configuration changes by selecting File => Save.