4.11. Fence Virt (Serial/VMChannel Mode)

Table 4.12, “Fence virt (Serial/VMChannel Mode)” lists the fence device parameters used by fence_virt, the fence agent for virtual machines using VM channel or serial mode .

Table 4.12. Fence virt (Serial/VMChannel Mode)
luci Field	`cluster.conf` Attribute	Description
Name	`name`	A name for the Fence virt fence device.
Serial Device	`serial_device`	On the host, the serial device must be mapped in each domain's configuration file. For more information, see the `fence_virt` man page. If this field is specified, it causes the `fence_virt` fencing agent to operate in serial mode. Not specifying a value causes the `fence_virt` fencing agent to operate in VM channel mode.
Serial Parameters	`serial_params`	The serial parameters. The default is 115200, 8N1.
VM Channel IP Address	`channel_address`	The channel IP. The default value is 10.0.2.179.
Timeout (optional)	`timeout`	Fencing timeout, in seconds. The default value is 30.
Domain	`port` (formerly `domain`)	Virtual machine (domain UUID or name) to fence.
	`ipport`	The channel port. The default value is 1229, which is the value used when configuring this fence device with luci.
Delay (optional)	`delay`	Fencing delay, in seconds. The fence agent will wait the specified number of seconds before attempting a fencing operation. The default value is 0.

The following command creates a fence device instance for virtual machines using serial mode.

ccs -f cluster.conf --addfencedev fencevirt1 agent=fence_virt serial_device=/dev/ttyS1 serial_params=19200, 8N1

The following is the cluster.conf entry for the fence_virt device:


 <fencedevices>
   <fencedevice agent="fence_virt" name="fencevirt1" serial_device="/dev/ttyS1" serial_params="19200, 8N1"/>
 </fencedevices>