Managing Serviceguard 13th Edition, February 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7 331
NOTE If you are removing a volume group from the cluster configuration, make
sure that you also modify or delete any package control script that
activates and deactivates this volume group. In addition, you should use
the LVM vgexport command on the removed volume group from each
node that will no longer be using the volume group.
Using Serviceguard Commands to Change the LVM
Configuration While the Cluster is Running From the LVM’s
cluster, follow these steps:
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 send the new 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 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 - 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).