Specifications
Expected Behaviors
vmware-cmd -H 10.0.0.1 -U root -P secret/vmfs/volumes/4e08c1b9-d741c09c-1d3e-
0019b9cb28be/lampserver/lampserver.vmxstop hard
Note: For further information on VMware commands, use vmware-cmd with no arguments to display
a help page about all options.
Expected Behaviors
When LifeKeeper detects a communication failure with a node, that node will be powered off and a
failover will occur. Once the issue is repaired, the node will have to be manually powered on.
Watchdog
Watchdog is a method of monitoring a server to ensure that if the server is not working properly,
corrective action (reboot) will be taken so that it does not cause problems. Watchdog can be
implemented using special watchdog hardware or using a software-only option.
(Note: This configuration has only been tested with Red Hat Enterprise Linux Versions 5 and 6. No
other operating systems have been tested; therefore, no others are supported at this time.)
Components
l Watchdog timer software driver or an external hardware component
l Watchdog daemon – rpm available through the Linux distribution
l LifeKeeper core daemon – installed with the LifeKeeper installation
l Health check script – LifeKeeper monitoring script
LifeKeeper Interoperability with Watchdog
118Configuration