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250 vFoglight
Administration and Configuration Guide
Defining rule types
There are two types of rules in vFoglight. Each rule type of is associated with a
topology type and can be scoped to one or more specific topology objects. Those types
are:
Simple rules. A simple rule has a single condition, and can be in one of three
states:
•Fire
Undefined
Normal
If its condition is met, the state of the rule is set to Fire and any actions that are
associated with this state are performed. If the condition is not met, the rule
remains in the Normal state. If the rules condition cannot be evaluated because
data is missing or unavailable, the state of the rule is set to Undefined and any
actions that are associated with this state are performed.
The condition for a simple rule is regularly evaluated against monitoring data.
Therefore, the state of the rule can change if the data changes. For example, if a
set of monitoring data matches a simple rule’s condition, the rule enters the Fire
state. If the next set does not match the condition, the rule exits the Fire state and
enters the Normal state. You can configure a simple rule to perform one or more
actions upon entering and/or exiting each state.
Multiple-Severity rules. A multiple-severity rule is a more complex type of rule
that can have up to five severity levels:
Undefined
•Fatal
•Critical
Warning
Normal
When you create a multiple-severity rule, you must specify a condition for at least
one severity level (Fatal, Critical, or Warning).
As with simple rules, the conditions for a multiple-severity rule are regularly
evaluated against monitoring data. All conditions in a rule are evaluated; the
severity state is set to the highest level for which the condition evaluates to true. If
none of the conditions are met, the severity state is set to Normal. If a condition
cannot be evaluated because data is missing or unavailable, the state is set to
Undefined.
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