Configuring Fence Devices - Red Hat Cluster for Enterprise Linux 5 Configuration

Cluster Properties dialog box presents text boxes for Name, Config Version, and two
Fence Daemon Properties parameters: Post-Join Delay and Post-Fail Delay.
3. At the Cluster Alias text box, specify a name for the cluster. The name should be descript-
ive enough to distinguish it from other clusters and systems on your network (for example,
or
nfs_cluster httpd_cluster
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.
4. (Optional) The Config Version value is set to
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.
5. Specify the Fence Daemon Properties parameters: Post-Join Delay and Post-Fail
Delay.
a. The Post-Join Delay parameter is the number of seconds the fence daemon (
waits before fencing a node after the node joins the fence domain. The Post-Join
Delay default value is
seconds, but can vary according to cluster and network performance.
b. The Post-Fail Delay parameter is the number of seconds the fence daemon (
waits before fencing a node (a member of the fence domain) after the node has
failed.The Post-Fail Delay default value is
network performance.
Note
For more information about Post-Join Delay and Post-Fail Delay, refer to the
fenced(8) man page.
6. Save cluster configuration changes by selecting File => Save.

4. Configuring Fence Devices

Configuring fence devices for the cluster consists of selecting one or more fence devices and
specifying fence-device-dependent parameters (for example, name, IP address, login, and
password).
To configure fence devices, follow these steps:
1. Click Fence Devices. At the bottom of the right frame (labeled Properties), click the Add a
4. Configuring Fence Devices
). The cluster name cannot exceed 15 characters.
by default and is automatically incremented
1
. A typical setting for Post-Join Delay is between 20 and 30
3
. Its value may be varied to suit cluster and
0
40
)
fenced
)
fenced