Managing HP Serviceguard A.11.20.10 for Linux, December 2012

Assuming nodeA is pkg1’s primary node (where it normally starts), create node_name entries in
the package configuration file as follows:
node_name nodeA
node_name nodeB
node_name nodeC
node_name nodeD
4.8.12.2.2 Configuring monitored_subnet_access
In order to monitor subnet 15.244.65.0 or 15.244.56.0, depending on where pkg1 is running,
you would configure monitored_subnet and monitored_subnet_access in pkg1’s
package configuration file as follows:
monitored_subnet 15.244.65.0
monitored_subnet_access PARTIAL
monitored_subnet 15.244.56.0
monitored_subnet_access PARTIAL
NOTE: Configuring monitored_subnet_access as FULL (or not configuring
monitored_subnet_access) for either of these subnets will cause the package configuration
to fail, because neither subnet is available on all the nodes.
4.8.12.2.3 Configuring ip_subnet_node
Now you need to specify which subnet is configured on which nodes. In our example, you would
do this by means of entries such as the following in the package configuration file:
ip_subnet 15.244.65.0
ip_subnet_node nodeA
ip_subnet_node nodeB
ip_address 15.244.65.82
ip_address 15.244.65.83
ip_subnet 15.244.56.0
ip_subnet_node nodeC
ip_subnet_node nodeD
ip_address 15.244.56.100
ip_address 15.244.56.101
4.8.13 Configuring a Package: Next Steps
When you are ready to start configuring a package, proceed to Chapter 6: “Configuring Packages
and Their Services ” (page 163); start with “Choosing Package Modules” (page 163). (If you find it
helpful, you can assemble your package configuration data ahead of time on a separate worksheet
for each package; blank worksheets are in Appendix C).
4.9 Planning for Changes in Cluster Size
If you intend to add additional nodes to the cluster online (while it is running) ensure that they are
connected to the same heartbeat subnets and to the same lock disks as the other cluster nodes.
In selecting a cluster lock configuration, be careful to anticipate any potential need for additional
cluster nodes. Remember that while a two-node cluster must use a cluster lock, a cluster of more
than four nodes must not use a lock LUN, but can use a quorum server. So if you will eventually
need five nodes, you should build an initial configuration that uses a quorum server.
4.9 Planning for Changes in Cluster Size 127