Configuring Fence Devices - Red Hat CLUSTER SUITE FOR ENTERPRISE LINUX 5.1 Configuration Manual

Chapter 3. Configuring Red Hat Cluster With Conga
Parameter
Minimum Score
Device
Label
Heuristics
Apply
Table 3.1. Quorum-Disk Parameters

5. Configuring Fence Devices

Configuring fence devices consists of creating, modifying, and deleting fence devices. Creating
a fence device consists of selecting a fence device type and entering parameters for that fence
device (for example, name, IP address, login, and password). Modifying a fence device consists
of selecting an existing fence device and changing parameters for that fence device. Deleting a
fence device consists of selecting an existing fence device and deleting it.
Tip
If you are creating a new cluster, you can create fence devices when you
configure cluster nodes. Refer to
With Conga you can create shared and non-shared fence devices.
32
Description
The minimum score for a node to be considered "alive". If omitted or
set to 0, the default function,
sum of the heuristics scores. The Minimum Score value must never
exceed the sum of the heuristic scores; otherwise, the quorum disk
cannot be available.
The storage device the quorum daemon uses. The device must be the
same on all nodes.
Specifies the quorum disk label created by the
field contains an entry, the label overrides the Device field. If this field
is used, the quorum daemon reads
for qdisk signatures on every block device found, comparing the label
against the specified label. This is useful in configurations where the
quorum device name differs among nodes.
Path to Program — The program used to determine if this heuristic is
alive. This can be anything that can be executed by
return value of 0 indicates success; anything else indicates failure.
This field is required.
Interval — The frequency (in seconds) at which the heuristic is polled.
The default interval for every heuristic is 2 seconds.
Score — The weight of this heuristic. Be careful when determining
scores for heuristics. The default score for each heuristic is 1.
Propagates the changes to the cluster configuration file
(
/etc/cluster/cluster.conf
floor((n+1)/2)
/proc/partitions
) in each cluster node.
Section 6, "Configuring Cluster
, is used, where is the
n
utility. If this
mkqdisk
and checks
. A
/bin/sh -c
Members".