Installation guide

To delete a member functioning only as a GULM client from an existing cluster that is currently in
operation, follow these steps:
1. At one of the running nodes (not at a node to be deleted), start system-config-cluster (refer
to Section 5.2, “Starting the Cluster Configuration Tool”). At the Cluster Status Tool tab,
under Services, disable or relocate each service that is running on the node to be deleted.
2. Stop the cluster software on the node to be deleted by running the following commands at that
node in this order:
a. service rgm anager stop, if the cluster is running high-availability services
(rgm anager)
b. service gfs stop, if you are using Red Hat GFS
c. service clvm d stop, if CLVM has been used to create clustered volumes
d. service lock_gulm d stop
e. service ccsd stop
3. At system-config-cluster (running on a node that is not to be deleted), in the Cluster
Configurat ion T ool tab, delete the member as follows:
a. If necessary, click the triangle icon to expand the Cluster Nodes property.
b. Select the cluster node to be deleted. At the bottom of the right frame (labeled Properties),
click the Delete Node button.
c. Clicking the Delete Node button causes a warning dialog box to be displayed requesting
confirmation of the deletion (Figure 5.8, “Confirm Deleting a Member”).
Figure 5.8. Confirm Deleting a Member
d. At that dialog box, click Yes to confirm deletion.
e. Propagate the updated configuration by clicking the Send to Cluster button.
(Propagating the updated configuration automatically saves the configuration.)
4. Stop the cluster software on the remaining running nodes by running the following commands at
each node in this order:
a. service rgm anager stop, if the cluster is running high-availability services
(rgm anager)
b. service gfs stop, if you are using Red Hat GFS
c. service clvm d stop, if CLVM has been used to create clustered volumes
d. service lock_gulm d stop
e. service ccsd stop
5. Start cluster software on all remaining cluster nodes by running the following commands in this
order:
a. service ccsd start
b. service lock_gulm d start
c. service clvm d start, if CLVM has been used to create clustered volumes
Chapter 5. Configuring Red Hat Cluster With system-config-cluster
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