Managing Serviceguard 12th Edition, March 2006

Building an HA Cluster Configuration
Managing the Running Cluster
Chapter 5 263
• Halt the node. In Serviceguard Manager menu use Halt Node.
On the command line, use the cmhaltnode command.
• Check the cluster membership on the map or tree to verify that
the node has left the cluster. In Serviceguard Manager, open the
map or tree or Cluster Properties. On the command line, use the
cmviewcl command.
• Start the node. In Serviceguard Manager use the Run Node
command. On the command line, use the cmrunnode command.
• To verify that the node has returned to operation, check the
Serviceguard Manager map or tree, or use the cmviewcl
command again.
4. Bring down the cluster. In Serviceguard Manager, use the Halt
Cluster command. On the command line, use the cmhaltcl -v -f
command.
Additional cluster testing is described in See “Troubleshooting Your
Cluster” on page 359. 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.
NOTE The root volume group does not need to be included in the
custom_vg_activation function, since it is automatically activated
before the /etc/lvmrc file is used at boot time.