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The STONITH module (a.k.a. STOMITH) provides an extensible interface
for remotely powering down a node in the cluster. The idea is quite simple:
When the software running on one machine wants to make sure another
machine in the cluster is not using a resource, pull the plug on the other
machine. It's simple and reliable, albiet admittedly brutal.
Here's an example command line invocation used to power off a machine
named 'nodeb'. The parameters are dependent on the type of device you
are using for this capability.
stonith -t rps10 -p "/dev/ttyS5 nodeb 0 " nodeb
Currently supported devices:
apcsmart: APCSmart (tested with 2 old 900XLI)
baytech: Baytech RPC5
meatware: Alerts an operator to manually turn off a device.
nw_rpc100s: Micro Energetics Night/Ware RPC100S
rps10: Western Telematics RPS10
vacm_stonith: VA Linux Cluster Manager (see README.vacm)
To see the parameter syntax for a module, run the 'stonith' command and omit the
-p parameter. For example:
$ /usr/sbin/stonith -t rps10 test
stonith: Invalid config file for rps10 device.
stonith: Config file syntax: <serial_device> <node> <outlet> [ <node> <outlet> [...] ]
All tokens are white-space delimited.
Blank lines and lines beginning with # are ignored
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