Installation guide

Attribute Description
to CMAN when it has a high enough score.
log_level Controls the verbosity of the quorum daemon in the
system logs. 0 = emergencies; 7 = debug.
log_facility Controls the syslog facility used by the quorum
daemon when logging. For a complete list of available
facilities, see syslog.conf(5). The default value for this
is daemon.
min_score Absolute minimum score to be consider ones self
"alive". If omitted, or set to 0, the default function
"floor((n+1)/2)" is used, where n is the total of all of
defined heuristics score attributes. This must never
exceed the sum of the heuristic scores, or else the
quorum disk will never be available.
device The device the quorum daemon will use. This device
must be the same on all nodes.
label Overrides the device field if present. If specified, the
quorum daemon will read /proc/partitions and search
for qdisk signatures on every block device found,
comparing the label against the specified label. This is
useful in configurations where the block device name
differs on a per-node basis.
In the case of a split brain situation, heuristics can be used to identify the cluster partition that
is best to survive. Heuristics can be defined by adding a <heuristic> tag within the <quorumd>
tag.
The <heuristic> tag should define the following attributes:
Attribute Description
program The program used to determine if this heuristic is alive.
This can be anything executable by /bin/sh -c. A return
value of zero indicates success; anything else indicates
failure.
score The weight of this heuristic. Be careful when determining
scores for heuristics. The default score for each heuristic
is 1.
interval The frequency (in seconds) at which we poll the heuristic.
The default interval for every heuristic is 2 seconds.
tko The number of heuristic test failures before a node is
considered DOWN and its score is removed. The default
tko for each heuristic is 1, which can be inadequate for
actions such as 'ping'.
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