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3.6. Configuring Fencing for Cluster Members
Once you have completed the initial steps of creating a cluster and creating fence devices, you need to configure fencing for the cluster nodes. To configure fencing for the nodes after creating a new cluster and configuring the fencing devices for the cluster, follow the steps in this section. Note that you must configure fencing for each node in the cluster.
The following sections provide procedures for configuring a single fence device for a node, configuring a node with a backup fence device, and configuring a node with redundant power supplies:
3.6.1. Configuring a Single Fence Device for a Node
Use the following procedure to configure a node with a single fence device.
From the cluster-specific page, you can configure fencing for the nodes in the cluster by clicking on Nodes along the top of the cluster display. This displays the nodes that constitute the cluster. This is also the default page that appears when you click on the cluster name beneath Manage Clusters from the menu on the left side of the luci Homebase page.
Click on a node name. Clicking a link for a node causes a page to be displayed for that link showing how that node is configured.
The node-specific page displays any services that are currently running on the node, as well as any failover domains of which this node is a member. You can modify an existing failover domain by clicking on its name. For information on configuring failover domains, see Section 3.7, “Configuring a Failover Domain”.
On the node-specific page, click Add a fence method.
Enter a name for the fencing method that you are configuring for this node.
Click Submit. This displays the node-specific screen that now displays the method you have just added under Fence Devices.
Configure a fence instance for this method by clicking Add a Fence Instance. This displays a drop-down menu from which you can select a fence device you have previously configured, as described in Section 3.5.1, “Creating a Fence Device”.
Select a fence device for this method. If this fence device requires that you configure node-specific parameters, the display shows the parameters to configure. For information on fencing parameters, refer to Appendix A, Fence Device Parameters.
Click Submit. This returns you to the node-specific screen with the fence method and fence instance displayed.
