Managing Serviceguard 14th Edition, June 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7360
1. Use the cmgetconf command to store a copy of the cluster's existing
cluster configuration in a temporary file. For example: cmgetconf
clconfig.ascii
2. Edit the file clconfig.ascii to add or delete volume groups.
3. Use the cmcheckconf command to verify the new configuration.
4. Use the cmapplyconf command to apply the changes to the
configuration and distribute the new binary configuration file to all
cluster nodes.
NOTE If the volume group that you are deleting from the cluster is currently
activated by a package, the configuration will be changed but the
deletion will not take effect until the package is halted; thereafter, the
package will no longer be able to run without further modification, such
as removing the volume group from the package configuration file or
control script.
Changing the VxVM or CVM Storage Configuration
You can add VxVM disk groups to the cluster configuration while the
cluster is running. Before you can add new CVM disk groups, the cluster
must be running.
NOTE CVM (and CFS, the Veritas Cluster File System) are supported on some,
but not all, current releases of HP-UX. Check the latest Release Notes
for your version of Serviceguard for up-to-date information
(http://www.docs.hp.com -> High Availability - >
Serviceguard).
Create CVM disk groups from the CVM Master Node:
• For CVM 3.5, and for CVM 4.1 and later without CFS, edit the
configuration file of the package that uses CVM storage. Add the
CVM storage group by means of the cvm_dg parameter (or
STORAGE_GROUP in a legacy package). Then run the cmapplyconf
command.