Red Hat GFS 6.0 -, Administrator'S Manual

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Chapter 6. Creating the Cluster Configuration System Files 47
Warning
Manual fencing should not be used in a production environment. Manual fencing depends on human
intervention whenever a node needs recovery. Cluster operation is halted during the intervention.
Parameter Description
CserverName
For Egenera BladeFrame fencing device: The name of an Egenera
control blade, the Egenera control blade with which the fence agent
communicates via ssh.
DeviceName
The name of a fencing device. The
DeviceName
parameter specifies
the name of a fencing device and makes that fencing device available
for use by the fence section of a
nodes.ccs
file
(
nodes.ccs: NodeName /fence/ MethodName
). The fence section
of a
nodes.ccs
file also contains
DeviceName
parameters each
mapping to a
DeviceName
in the
fence.ccs
file.
HostName
The host name of a RILOE card on the network to which stunnel
connections can be made.
IPAddress
For fencing with power and Fibre Channel switches: The IP address
of a switch to which Telnet connections can be established.
LoginName
The login name for a power switch, an FC switch, or a RILOE card.
LoginPassword
The password for logging in to a power switch, an FC switch, or a
RILOE card.
multipath Selects GNBD multipath style fencing.
CAUTION: When multipath style fencing is used, if the
gnbd_servd
process of a GNBD server node cannot be contacted, it is fenced as
well, using its specified fencing method. That means that when a
GNBD client (GFS node) is fenced, any node listed as its GNBD
server that does not have the
gnbd_serv
module loaded (which starts
gnbd_servd
) is also fenced.
RpowerBinaryPath
For xCAT fencing device, the path to the
rpower
binary.
Number
The number of times to retry connecting to the GNBD server after a
failed attempt, before the server is fenced. The parameter entry is for
the
retrys =
entry and is only valid when used with multipath style
fencing. (Refer to the multipath entry in this table.) The default value
of
Number
is 3.
Seconds
The length of time, in seconds, to wait between retries. This parameter
entry is for the
wait_time =
entry and is only valid when used with
multipath style fencing. (Refer to the multipath entry in this table.)
The default value of
Seconds
is 2.
ServerName
The host name of a GNBD server. Each GNBD server is represented
with a "
server =
" line in the
fence.ccs
file. For example, if you
have three GNBD servers, then the
fence.ccs
file needs three
"
server =
" lines one for each GNBD server.
Table 6-2. File Syntax Description: Variables for
fence.ccs