Managing Serviceguard 12th Edition, March 2006

Planning and Documenting an HA Cluster
Package Configuration Planning
Chapter 4 169
RESOURCE_NAME /net/interfaces/lan/status/lan0
RESOURCE_POLLING_INTERVAL 60
RESOURCE_START DEFERRED
RESOURCE_UP_VALUE = UP
RESOURCE_NAME /net/interfaces/lan/status/lan1
RESOURCE_POLLING_INTERVAL 60
RESOURCE_START DEFERRED
RESOURCE_UP_VALUE = UP
RESOURCE_NAME /net/interfaces/lan/status/lan2
RESOURCE_POLLING_INTERVAL 60
RESOURCE_START AUTOMATIC
RESOURCE_UP_VALUE = UP
In the package control script, specify only the deferred resources, using
the DEFERRED_RESOURCE_NAME parameter:
DEFERRED_RESOURCE_NAME[0]="/net/interfaces/lan/status/lan0"
DEFERRED_RESOURCE_NAME[1]="/net/interfaces/lan/status/lan1"
Planning for Expansion
You can add packages to a running cluster. This process is described in
the chapter “Cluster and Package Administration.”
When adding packages, be sure not to exceed the value of
MAX_CONFIGURED_PACKAGES as defined in the cluster configuration file.
Choosing Switching and Failover Behavior
Failover type packages can be configured so that IP addresses switch
from a failed LAN card to a standby LAN card on the same physical
subnet. Enable the package configuration parameter for
LOCAL_LAN_FAILOVER. (Enabled, or YES, is the default.)
To determine the failover behavior of a failover package, you define the
policy that governs where Serviceguard will automatically start up a
package that is not running. In addition, you can define a failback policy
that determines whether a package will be automatically returned to its
primary node when that is possible.