Managing HP Serviceguard for Linux Ninth Edition, April 2009

NOTE: If you want to remove a node from the cluster, run the cmapplyconf
command from another node in the same cluster. If you try to issue the command on
the node you want removed, you will get an error message.
1. Use the following command to store a current copy of the existing cluster
configuration in a temporary file:
cmgetconf -c cluster1 temp.conf
2. Specify the new set of nodes to be configured (omitting ftsys10) and generate
a template of the new configuration:
cmquerycl -C clconfig.conf -c cluster1 -n ftsys8 -n ftsys9
3. Edit the file clconfig.conf to check the information about the nodes that remain
in the cluster.
4. Halt the node you are going to remove (ftsys10in this example):
cmhaltnode -f -v ftsys10
5. Verify the new configuration:
cmcheckconf -C clconfig.conf
6. From ftsys8 or ftsys9, apply the changes to the configuration and distribute
the new binary configuration file to all cluster nodes.:
cmapplyconf -C clconfig.conf
NOTE: If you are trying to remove an unreachable node on which many packages
are configured to run, you may see the following message:
The configuration change is too large to process while the cluster is running.
Split the configuration change into multiple requests or halt the cluster.
In this situation, you must halt the cluster to remove the node.
Changing the Cluster Networking Configuration while the Cluster Is Running
What You Can Do
Online operations you can perform include:
• Add a network interface and its HEARTBEAT_IP or STATIONARY_IP.
• Delete a network interface and its HEARTBEAT_IP or STATIONARY_IP.
• Change a HEARTBEAT_IP or STATIONARY_IP interface from IPv4 to IPv6, or
vice versa.
• Change the designation of an existing interface from HEARTBEAT_IP to
STATIONARY_IP, or vice versa.
• Change the NETWORK_POLLING_INTERVAL.
Reconfiguring a Cluster 247