Manualshelf

Installation guide

ManualsBrandsRed Hat ManualsOtherCLUSTER SUITE 4.7 DM MULTIPATH
81828384858687888990
Chapter 4. Cluster Administration 73
4.5. Backing Up and Restoring the Cluster Database
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 misconfig-
uration 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 configu-
ration file according to the following steps:
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. Increment the configuration version beyond the current working version number as
follows:
a. Click Cluster => Edit Cluster Properties.
b. At the Cluster Properties dialog box, change the Config Version value and
click OK.
5. Click File => Save As.
6. Clicking File => Save As causes the system-config-cluster dialog box to be dis-
played.
7. At the the system-config-cluster dialog box, select
/etc/cluster/cluster.conf and click OK. (Verify the file selection in the
Selection box.)
8. Clicking OK causes an Information dialog box to be displayed. At that dialog box,
click OK.
9. Propagate the updated configuration file throughout the cluster by clicking Send to
Cluster.