Installation guide

3. Specify the information in the Fence Device Configuration dialog box according to the type
of fence device. Refer to Appendix B, Fence Device Parameters for more information about fence
device parameters.
4. Click OK.
5. Choose File => Save to save the changes to the cluster configuration.
5.5. Adding and Deleting Members
The procedures to add or delete a cluster member vary depending on whether the cluster is a newly
configured cluster or a cluster that is already configured and running.
To add a member to a new cluster, refer to Section 5.5.1, “Adding a Member to a New Cluster”.
To add or delete a cluster member in an existing cluster, refer to the following sections:
Section 5.5.2, “Adding a Member to a Running DLM Cluster”
Section 5.5.3, “Deleting a Member from a DLM Cluster”
Section 5.5.4, “Adding a GULM Client-only Member”
Section 5.5.5, “Deleting a GULM Client-only Member”
Section 5.5.6, “Adding or Deleting a GULM Lock Server Member”
5.5.1. Adding a Member to a New Cluster
To add a member to a new cluster, follow these steps:
1. At system-config-cluster, in the Cluster Configuration Tool tab, click Cluster Node.
2. At the bottom of the right frame (labeled Propert ies), click the Add a Cluster Node button.
Clicking that button causes a Node Properties dialog box to be displayed. For a DLM cluster,
the Node Properties dialog box presents text boxes for Cluster Node Name and Quorum
Votes (refer to Figure 5.5, “Adding a Member to a New DLM Cluster”). For a GULM cluster, the
Node Properties dialog box presents text boxes for Cluster Node Name and Quorum
Votes, and presents a checkbox for GULM Lockserver (refer to Figure 5.6, “Adding a Member to
a New GULM Cluster”)
Important
The number of nodes that can be configured as GULM lock servers is limited to either one,
three, or five.
Figure 5.5. Adding a Member to a New DLM Cluster
Chapter 5. Configuring Red Hat Cluster With system-config-cluster
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