Disabling The Cluster Software - Red Hat ENTERPRISE LINUX 4 - ADMINISTRATION Manual

1. At the Cluster Configuration Tool tab of the Red Hat Cluster Suite management GUI, click File
=> Open.
2. Clicking File => Open causes the system-config-cluster dialog box to be displayed.
3. At the the system-config-cluster dialog box, select a backup file (for example, /etc/cluster/
cluster.conf.bak.1). Verify the file selection in the Selection box and click OK.
4. Click File => Save As.
5. Clicking File => Save As causes the system-config-cluster dialog box to be displayed.
6. At the the system-config-cluster dialog box, select /etc/cluster/cluster.conf and click
OK. (Verify the file selection in the Selection box.)
7. Clicking OK causes an Information dialog box to be displayed. At that dialog box, click OK.
8. Propagate the updated configuration file throughout the cluster by clicking Send to Cluster.
Note
The Cluster Configuration Tool does not display the Send to Cluster button if
the cluster is new and has not been started yet, or if the node from which you are
running the Cluster Configuration Tool is not a member of the cluster. If the Send
to Cluster button is not displayed, you can still use the Cluster Configuration Tool;
however, you cannot propagate the configuration. You can still save the configuration
file. For information about using the Cluster Configuration Tool for a new cluster
configuration, refer to
cluster.
9. Clicking Send to Cluster causes a Warning dialog box to be displayed. Click Yes to propagate
the configuration.
10. Click the Cluster Management tab and verify that the changes have been propagated to the
cluster members.

6.5. Disabling the Cluster Software

It may become necessary to temporarily disable the cluster software on a cluster member. For
example, if a cluster member experiences a hardware failure, you may want to reboot that member,
but prevent it from rejoining the cluster to perform maintenance on the system.
Use the /sbin/chkconfig command to stop the member from joining the cluster at boot-up as
follows:
# chkconfig --level 2345 rgmanager off
# chkconfig --level 2345 gfs off
# chkconfig --level 2345 clvmd off
# chkconfig --level 2345 fenced off
# chkconfig --level 2345 lock_gulmd off
# chkconfig --level 2345 cman off
Chapter 5, Configuring Red Hat Cluster With system-config-
Disabling the Cluster Software
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