Managing HP Serviceguard for Linux, Tenth Edition, September 2012

• You cannot detach a package that is in maintenance mode, and you cannot place
a package into maintenance mode if any of its dependent packages are detached.
For more information about maintenance mode, see“Maintaining a Package:
Maintenance Mode” (page 255). For more information about dependencies, see
“About Package Dependencies” (page 130).
• You cannot make configuration changes to a cluster in which any packages are
detached.
cmapplyconf (1m) will fail.
• You cannot halt detached packages while the cluster is down.
If you have halted a node and detached its packages, you can log in as superuser
on any other node still running in the cluster and halt any of the detached packages.
But if you have halted the cluster, you must restart it, re-attaching the packages,
before you can halt any of the packages
• If you are using LVM, all the cluster nodes must have Base LVM version B.11.31.0909
or later.
• HPVM shared volume groups are not supported with Live Application detach.
• cmeval (1m) does not support Live Application Detach.
See “Previewing the Effect of Cluster Changes” (page 261) for more information
about cmeval.
• In preview mode (-t) cmrunnode and cmruncl can provide only a partial
assessment of the effect of re-attaching packages.
The assessment may not accurately predict the placement of packages that depend
on the packages that will be re-attached. For more information about preview mode,
see “Previewing the Effect of Cluster Changes” (page 261).
• cmmodpkg -e -t is not supported for a detached package.
• You cannot run a package that has been detached.
This could come up if you detect that a package has failed while detached (and
hence not being monitored by Serviceguard). Before you could restart the package
on another node, you would need to run cmhaltpkg (1m) to halt the package
on the node where it is detached.
• You cannot halt a package that is in a transitory state such as STARTING or
HALTING.
For more information about package states, see “Package Status and State”
(page 234).
248 Cluster and Package Maintenance