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rules.md

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Rules

The rule-system works via an exclude list, matching rules will include or exclude the matching items, depending on the type of dashboard.

The configuration is done via toml.

For example:

[[rule]]
description = "blocked because not needed"
what = "fooo service"
  • The description field provides a visible explanation, why the item is excluded.
  • The what field selects all items where the What matches the given regular expression.
[[rule]]
description = "Ignore Drafts"
what = "Thing"
when = "> 60"
[rule.label]
Draft = "true"
  • The label section selects items via labels. In this example it would match an item which has the label Draft which matches the given regular expression.
  • The label rules will combine as AND with other label rules and when and what rules.
  • when rules interpreted as "X seconds from now". The above example would match an alert when the alert has lasted a minimum of 60 seconds. Times in the future have an undefined behaviour.

Matching Rules

The default is to match the value in the configuration as a regular expression. However, this can be changed by specifying an operator.

  • =~ string: Explicitly require a regular expression to be matched. This is the same as just leaving =~ out.
  • !~ string: Require non-matching regular expression to be matched.
  • = string|number: Require the string or number to exactly match. In case
    the value is numeric, this will mean that the value will compared like a floating point value. This means that differences below 1e-8 will be considered to be the same.
  • != string|number: Require not matching the exact string/number.
  • > number: Require both configuration and the value in the alert to be a numerical value and that the value in the alert to be bigger than the configured number. This also applies to the <, >=, <= operators.

Example

[[rule]]
description = "Ignore certain group"
[rule.label]
groups = "= A-Group"

[[rule]]
description = "Ignore all with group beginning with A"
[rule.label]
groups = "~= (^|,)A"

[[rule]]
description = "Ignore old things"
when = ">= 60"