Adding A Member To A Running Cluster - Red Hat ENTERPRISE LINUX 5 - ADMINISTRATION Manual

Chapter 5. Configuring Red Hat Cluster With system-config-cluster
a. Click the node that you added in the previous step.
b. At the bottom of the right frame (below Properties), click Manage Fencing For This Node.
Clicking Manage Fencing For This Node causes the Fence Configuration dialog box to be
displayed.
c. At the Fence Configuration dialog box, bottom of the right frame (below Properties), click
Add a New Fence Level. Clicking Add a New Fence Level causes a fence-level element (for
example, Fence-Level-1, Fence-Level-2, and so on) to be displayed below the node in the
left frame of the Fence Configuration dialog box.
d. Click the fence-level element.
e. At the bottom of the right frame (below Properties), click Add a New Fence to this Level.
Clicking Add a New Fence to this Level causes the Fence Properties dialog box to be
displayed.
At the Fence Properties dialog box, click the Fence Device Type drop-down box and select
f.
the fence device for this node. Also, provide additional information required (for example, Port
and Switch for an APC Power Device).
g. At the Fence Properties dialog box, click OK. Clicking OK causes a fence device element to
be displayed below the fence-level element.
h. To create additional fence devices at this fence level, return to step 6d. Otherwise, proceed to
the next step.
i. To create additional fence levels, return to step 6c. Otherwise, proceed to the next step.
If you have configured all the fence levels and fence devices for this node, click Close.
j.
7. Choose File => Save to save the changes to the cluster configuration.

5.5.2. Adding a Member to a Running Cluster

The procedure for adding a member to a running cluster depends on whether the cluster contains only
two nodes or more than two nodes. To add a member to a running cluster, follow the steps in one of
the following sections according to the number of nodes in the cluster:
• For clusters with only two nodes —
Section 5.5.2.1, "Adding a Member to a Running Cluster That Contains Only Two Nodes"
• For clusters with more than two nodes —
Section 5.5.2.2, "Adding a Member to a Running Cluster That Contains More Than Two Nodes"
5.5.2.1. Adding a Member to a Running Cluster That Contains Only Two
Nodes
To add a member to an existing cluster that is currently in operation, and contains only two nodes,
follow these steps:
1. Add the node and configure fencing for it as in
56