Managing HP Serviceguard for Linux Ninth Edition, April 2009

Table 7-2 Types of Changes to Packages (continued)
Required Package StateChange to the Package
Package can be either running or halted.
See “Choosing Switching and Failover Behavior” (page 120).
Change package auto_run
Both packages can be either running or halted.
Special rules apply to packages in maintenance mode; see “Dependency
Rules for a Package in Partial-Startup Maintenance Mode” (page 240).
For dependency purposes, a package being reconfigured is considered to
be UP. This means that if pkgA depends on pkgB, and pkgA is down and
pkgB is being reconfigured, pkgA will run if it becomes eligible to do so,
even if pkgB's reconfiguration is not yet complete.
HP recommends that you separate package dependency changes from
changes that affect resources and services that the newly dependent package
will also depend on; reconfigure the resources and services first and apply
the changes, then configure the package dependency.
For more information see “About Package Dependencies” (page 121).
Add or delete a configured
dependency
Changes that Will Trigger Warnings
Changes to the following will trigger warnings, giving you a chance to cancel, if the
change would cause the package to fail.
NOTE: You will not be able to cancel if you use cmapplyconf -f.
• Package nodes
• Package dependencies
• Package weights (and also node capacity, defined in the cluster configuration file)
• Package priority
• auto_run
• failback_policy
Responding to Cluster Events
Serviceguard does not require much ongoing system administration intervention. As
long as there are no failures, your cluster will be monitored and protected. In the event
of a failure, those packages that you have designated to be transferred to another node
will be transferred automatically. Your ongoing responsibility as the system
administrator will be to monitor the cluster and determine if a transfer of package has
occurred. If a transfer has occurred, you have to determine the cause and take corrective
actions.
268 Cluster and Package Maintenance