Managing HP Serviceguard for Linux, Sixth Edition, August 2006

Troubleshooting Your Cluster
Solving Problems
Chapter 8282
where
<ip-address> is the address indicated above and <subnet> is
the result of masking the
<ip-address> with the mask found in the
same line as the inet address in the ifconfig output.
3. Ensure that package volume groups are deactivated. First unmount
any package logical volumes which are being used for file systems.
This is determined by inspecting the output resulting from running
the command df -l. If any package logical volumes, as specified by
the LV[] array variables in the package control script, appear under
the “Filesystem” column, use umount to unmount them:
# fuser -ku <logical-volume>
# umount <logical-volume>
Next, deactivate the package volume groups. These are specified by
the VG[] array entries in the package control script.
# vgchange -a n <volume-group>
4. Finally, re-enable the package for switching.
# cmmodpkg -e <package-name>
If after cleaning up the node on which the timeout occurred it is
desirable to have that node as an alternate for running the package,
remember to re-enable the package to run on the node:
# cmmodpkg -e -n <node-name> <package-name>
The default Serviceguard control scripts are designed to take the
straightforward steps needed to get an application running or stopped. If
the package administrator specifies a time limit within which these steps
need to occur and that limit is subsequently exceeded for any reason,
Serviceguard takes the conservative approach that the control script
logic must either be hung or defective in some way. At that point the
control script cannot be trusted to perform cleanup actions correctly, thus
the script is terminated and the package administrator is given the
opportunity to assess what cleanup steps must be taken.
If you want the package to switch automatically in the event of a control
script timeout, set the NODE_FAIL_FAST_ENABLED parameter to YES. In
this case, Serviceguard will cause a TOC on the node where the control
script timed out. This effectively cleans up any side effects of the
package’s run or halt attempt. In this case the package will be
automatically restarted on any available alternate node for which it is
configured.