Red Hat CLUSTER FOR ENTERPRISE LINUX 5.0, Руководство по настройке

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Parameter Description
Minimum Score The minimum score for a node to be considered "alive". If omitted or
set to 0, the default function,
floor((n+1)/2)
, is used, where
n
is the
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.
Device The storage device the quorum daemon uses. The device must be the
same on all nodes.
Label Specifies the quorum disk label created by the
mkqdisk
utility. If this
field contains an entry, the label overrides the Device field. If this field
is used, the quorum daemon reads
/proc/partitions
and checks
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.
Heuristics
Path to Program — The program used to determine if this heuristic is
alive. This can be anything that can be executed by
/bin/sh -c
. A
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.
Apply Propagates the changes to the cluster configuration file
(
/etc/cluster/cluster.conf
) in each cluster node.
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 Section 6, “Configuring Cluster Members” .
With Conga you can create shared and non-shared fence devices.
Chapter 3. Configuring Red Hat Cluster With Conga
32