Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Building an HA Cluster Configuration
Managing the Running Cluster
Chapter 5 173
• cmhaltnode is used to manually stop a running node. (This
command is also used by shutdown(1m).) A non-root with the role of
Full Admin can run this command from a cluster node or through
Serviceguard Manager.
• cmruncl is used to manually start a stopped cluster. A non-root user
with Full Admin access can run this command from a cluster node, or
through Serviceguard Manager.
• cmhaltcl is used to manually stop a cluster. A non-root user with
Full Admin access, can run this command from a cluster node or
through Serviceguard Manager.
You can use these commands to test cluster operation, as in the
following:
1. If the cluster is not already online, 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. In Serviceguard Manager, open the cluster on the
map or tree, and perhaps check its Properties. On the command line,
use the cmviewcl -v command.
Make sure that all nodes and networks are functioning as expected.
For more information, refer to the chapter on “Cluster and Package
Maintenance.”
3. Verify that nodes leave and enter the cluster as expected using the
following steps:
• Halt the cluster. In Serviceguard Manager menu use Halt
Cluster. 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.