Managing Serviceguard Sixteenth Edition, March 2009

1. If the cluster is not already running, start it. From the Serviceguard Manager menu,
choose Run Cluster. From the command line, use cmruncl -v.
By default, cmruncl will check the networks. Serviceguard will probe the actual
network configuration with the network information in the cluster configuration.
If you do not need this validation, use cmruncl -v -w none instead, to turn off
validation and save time
2. When the cluster has started, make sure that cluster components are operating
correctly. you can use Serviceguard Manager to do this, or use the command
cmviewcl -v.
Make sure that all nodes and networks are functioning as expected. For more
information, see Chapter 7: “Cluster and Package Maintenance” (page 297).
3. Verify that nodes leave and enter the cluster as expected using the following steps:
• Halt the node. You can use Serviceguard Manager or use the cmhaltnode
command.
• Check the cluster membership to verify that the node has left the cluster. You
can do this in Serviceguard Manager, or use the cmviewcl command.
• Start the node. You can use Serviceguard Manager or use the cmrunnode
command.
• To verify that the node has returned to operation, check in Serviceguard
Manager, or use the cmviewcl command again.
4. Bring down the cluster. You can do this in Serviceguard Manager, or use the
cmhaltcl -v -f command.
Additional cluster testing is described in See “Troubleshooting Your Cluster” (page 361).
Refer to Appendix A for a complete list of Serviceguard commands. Refer to the
Serviceguard Manager Help for a list of Serviceguard Administrative commands.
Preventing Automatic Activation of LVM Volume Groups
It is important to prevent LVM volume groups that are to be used in packages from
being activated at system boot time by the/etc/lvmrc file. One way to ensure that
this does not happen is to edit the /etc/lvmrc file on all nodes, setting
AUTO_VG_ACTIVATE to 0, then including all the volume groups that are not
cluster-bound in the custom_vg_activation function. Volume groups that will be
used by packages should not be included anywhere in the file, since they will be
activated and deactivated by control scripts.
Managing the Running Cluster 247