Managing HP Serviceguard for Linux, Eighth Edition, March 2008

Troubleshooting Your Cluster
Testing Cluster Operation
Chapter 8 301
Depending on the specific databases you are running, perform the
appropriate database recovery.
Testing the Cluster Manager
To test that the cluster manager is operating correctly, perform the
following steps for each node on the cluster:
1. Turn off the power to the node.
2. To observe the cluster reforming, enter the following command on
some other configured node:
cmviewcl -v
You should be able to observe that the powered down node is halted,
and that its packages have been correctly switched to other nodes.
3. Turn on the power to the node.
4. To verify that the node is rejoining the cluster, enter the following
command on any configured node:
cmviewcl -v
The node should be recognized by the cluster, but its packages should
not be running.
5. Move the packages back to the original node:
cmhaltpkg <pkgname>
cmmodpkg -e -n <originalnode>
cmrunpkg <pkgname>
Depending on the specific databases you are running, perform the
appropriate database recovery.
6. Repeat this procedure for all nodes in the cluster one at a time.