Managing Serviceguard 13th Edition, February 2007

Cluster and Package Maintenance
Reconfiguring a Cluster
Chapter 7 325
To update the values of the FIRST_CLUSTER_LOCK_PV and
SECOND_CLUSTER_LOCK_PV parameters without bringing down the
cluster, proceed as follows:
Step 1. Halt the node (cmhaltnode) on which you want to make the changes.
Step 2. In the cluster configuration ASCII file, modify the values of
FIRST_CLUSTER_LOCK_PV and SECOND_CLUSTER_LOCK_PV for this node.
Step 3. Run cmcheckconf to check the configuration.
Step 4. Run cmapplyconf to apply the configuration.
Step 5. Restart the node (cmrunnode).
Step 6. Repeat this procedure on each node on which you want to make the
changes.
Updating the Configuration Offline
If you cannot meet the conditions spelled out above for updating the
configuration online, or you prefer to make the changes while the cluster
is down, proceed as follows:
Step 1. Halt the cluster.
Step 2. In the cluster configuration ASCII file, modify the values of
FIRST_CLUSTER_LOCK_PV and SECOND_CLUSTER_LOCK_PV for each node.
Step 3. Run cmcheckconf to check the configuration.
Step 4. Run cmapplyconf to apply the configuration.
Removing a LAN or VLAN Interface
• Before removing a LAN or VLAN interface that is part of the cluster
configuration, you must bring down the cluster and remove the
interface from the cluster configuration; see “Reconfiguring a Halted
Cluster”.
• If you are not sure whether or not a physical interface (NIC) is part
of the cluster configuration, run olrad -C with the affected I/O slot
ID as argument. If the NIC is part of the cluster configuration, you’ll
see a warning message telling you to remove it from the
configuration before you proceed. See the olrad(1M) manpage for
more information about olrad.