Novell LINUX ENTERPRISE 11 - HIGH AVAILABILITY, Руководство пользователя, Страница: 97 / 298

Example 8.5 Configuration of an UPS Fencing Device
The configuration of a UPS type of fencing device is similar to the examples above.
The details are left (as an exercise) to the reader. All UPS devices employ the same
mechanics for fencing, but how the device itself is accessed varies. Old UPS devices
used to have just a serial port, in most cases connected at 1200baud using a special se-
rial cable. Many new ones still have a serial port, but often they also utilize a USB or
ethernet interface. The kind of connection you can use is dependent on what the plug-
in supports.
For example, compare the
apcmaster
with the
apcsmart
device by using the
stonith -t stonith-device-type -n
command:
stonith -t apcmaster -h
returns the following information:
STONITH Device: apcmaster - APC MasterSwitch (via telnet)
NOTE: The APC MasterSwitch accepts only one (telnet)
connection/session a time. When one session is active,
subsequent attempts to connect to the MasterSwitch will fail.
For more information see http://www.apc.com/
List of valid parameter names for apcmaster STONITH device:
ipaddr
login
password
With
stonith -t apcsmart -h
you get the following output:
STONITH Device: apcsmart - APC Smart UPS
(via serial port - NOT USB!).
Works with higher-end APC UPSes, like
Back-UPS Pro, Smart-UPS, Matrix-UPS, etc.
(Smart-UPS may have to be >= Smart-UPS 700?).
See http://www.networkupstools.org/protocols/apcsmart.html
for protocol compatibility details.
For more information see http://www.apc.com/
List of valid parameter names for apcsmart STONITH device:
ttydev
hostlist
The first plug-in supports APC UPS with a network port and telnet protocol. The second
plug-in uses the APC SMART protocol over the serial line, which is supported by many
different APC UPS product lines.
Fencing and STONITH 87