Managing HP Serviceguard A.11.20.20 for Linux, March 2014

7.5.1.2 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 and 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 113).
◦ 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.
NOTE: If you have a package configured with generic resources and you attempt to take it out
of the maintenance mode back to the running state, the status of generic resources are evaluated.
If any of the generic resources is 'down', the package cannot be taken out of the maintenance
mode.
7.5.2 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 and generic resources
components. 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 224).
If you want to reconfigure the package (using cmapplyconf (1m)) see “Reconfiguring a Package”
(page 240) and “Allowable Package States During Reconfiguration ” (page 242).
7.5.2.1 Procedure
Follow these steps to perform maintenance on a package's networking 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.
NOTE: If you now run cmviewcl, you'll see that the STATUS of pkg1 is up and its STATE
is maintenance.
3. If everything is working as expected, take the package out of maintenance mode:
cmmodpkg -m off pkg1
7.5 Maintaining a Package: Maintenance Mode 223