Managing Serviceguard Seventeenth Edition, First Reprint December 2009

Rules for a Package in Maintenance Mode or Partial-Startup Maintenance Mode
IMPORTANT: See the latest Serviceguard release notes for important information
about version requirements for package maintenance.
• The package must have package switching disabled before you can put it in
maintenance mode.
• You can put a package in maintenance mode only on one node.
— The node must be active in the cluster and must be eligible to run the package
(on the package's node_name list).
— If the package is not running, you must specify the node name when you run
cmmodpkg (1m) to put the package in maintenance mode.
— If the package is running, you can put it into maintenance only on the node on
which it is running.
— While the package is in maintenance mode on a node, you can run the package
only on that node.
• You cannot put a package in maintenance mode, or take it out maintenance mode,
if doing so will cause another running package to halt.
• Since package failures are ignored while in maintenance mode, you can take a
running package out of maintenance mode only if the package is healthy.
Serviceguard checks the state of the package’s services, subnets and EMS resources
to determine if the package is healthy. If it is not, you must halt the package before
taking it out of maintenance mode.
• You cannot do online configuration as described under “Reconfiguring a Package”
(page 350).
• You cannot configure new dependencies involving this package; that is, you cannot
make it dependent on another package, or make another package depend on it.
See also “Dependency Rules for a Package in Maintenance Mode or Partial-Startup
Maintenance Mode ” (page 321).
• You cannot use the -t option of any command that operates on a package that is
in maintenance mode; see “Previewing the Effect of Cluster Changes” (page 326)
for information about the -t option.
Additional Rules for Partial-Startup Maintenance Mode
• You must halt the package before taking it out of partial-startup maintenance
mode.
• To run a package normally after running it in partial-startup maintenance mode,
you must take it out of maintenance mode, and then restart it.
320 Cluster and Package Maintenance