Installation guide

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