The Cluster Configuration Tool
automatically retains backup copies of the three most recently used
configuration files (besides the currently used configuration
file). Retaining the backup copies is useful if the cluster does
not function correctly because of misconfiguration and you need to
return to a previous working configuration.
Each time you save a configuration file, the Cluster Configuration Tool saves backup copies of
the three most recently used configuration files as /etc/cluster/cluster.conf.bak.1, /etc/cluster/cluster.conf.bak.2, and /etc/cluster/cluster.conf.bak.3. The backup file
/etc/cluster/cluster.conf.bak.1 is the
newest backup, /etc/cluster/cluster.conf.bak.2 is the second
newest backup, and /etc/cluster/cluster.conf.bak.3 is the third newest
backup.
If a cluster member becomes inoperable because of
misconfiguration, restore the configuration file according to the
following steps:
-
At the Cluster Configuration Tool tab
of the Red Hat Cluster Suite management GUI, click => .
-
Clicking File => Open causes the
system-config-cluster dialog box to be
displayed.
-
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.
-
Increment the configuration version beyond the current working
version number as follows:
-
Click Cluster => Edit Cluster Properties.
-
At the Cluster Properties dialog box,
change the Config Version value and click
OK.
-
Click => .
-
Clicking => causes the system-config-cluster dialog box to be
displayed.
-
At the the system-config-cluster dialog
box, select /etc/cluster/cluster.conf and
click OK. (Verify the file selection in the
Selection box.)
-
Clicking OK causes an Information dialog box to be displayed. At that
dialog box, click OK.
-
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
Chapter 3 Cluster
Configuration.
|
-
Clicking Send to Cluster causes a
Warning dialog box to be displayed. Click
Yes to propagate the configuration.
-
Click the Cluster Management tab and
verify that the changes have been propagated to the cluster
members.
