Managing Serviceguard Seventeenth Edition, First Reprint December 2009

Dependency Rules for a Package in Maintenance Mode or Partial-Startup Maintenance Mode
You cannot configure new dependencies involving a package running in maintenance
mode, and in addition the following rules apply (we'll call the package in maintenance
mode pkgA).
• The packages that depend on pkgA must be down with package switching disabled
when you place pkgA in maintenance mode. This applies to all types of dependency
(including exclusionary dependencies) as described under “About Package
Dependencies” (page 168).
— You cannot enable a package that depends on pkgA.
— You cannot run a package that depends on pkgA, unless the dependent package
itself is in maintenance mode.
• Dependency rules governing packages that pkgA depends on to be UP are bypassed
so that these packages can halt and fail over as necessary while pkgA is in
maintenance mode.
• If both packages in a dependency relationship are in maintenance mode,
dependency rules are ignored for those two packages.
For example, both packages in an exclusionary dependency can be run and halted
in maintenance mode at the same time.
Performing Maintenance Using Maintenance Mode
You can put a package in maintenance mode, perform maintenance, and take it out of
maintenance mode, whether the package is down or running.
This mode is mainly useful for making modifications to networking or EMS resources.
To modify other components of the package, such as services or storage, follow the
additional rules and instructions under “Performing Maintenance Using Partial-Startup
Maintenance Mode” (page 322).
If you want to reconfigure the package (using cmapplyconf (1m)) see “Reconfiguring
a Package” (page 350) and “Allowable Package States During Reconfiguration ”
(page 354).
Procedure
Follow these steps to perform maintenance on a package's networking or EMS
components.
In this example, we'll call the package pkg1 and assume it is running on node1.
1. Place the package in maintenance mode:
cmmodpkg -m on -n node1 pkg1
2. Perform maintenance on the networks or resources and test manually that they
are working correctly.
Managing Packages and Services 321