fragile.md

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promql/fragile

This check will try to find alerting rules that might produce flapping alerts due to how they use sampling functions like topk().

Consider this alert:

- alert: oops
  expr: topk(10, mymetric > 0)

The topk(10, mymetric > 0) query used here might return a different set of time series on each rule evaluation. Different time series will have different labels, and because labels from returned time series are added to the alert labels it means that a different set of alerts will fire each time. This will cause flapping alerts from this rule.

Configuration

This check doesn't have any configuration options.

How to enable it

This check is enabled by default.

How to disable it

You can disable this check globally by adding this config block:

checks {
  disabled = ["promql/fragile"]
}

You can also disable it for all rules inside given file by adding a comment anywhere in that file. Example:

# pint file/disable promql/fragile

Or you can disable it per rule by adding a comment to it. Example:

# pint disable promql/fragile

How to snooze it

You can disable this check until given time by adding a comment to it. Example:

# pint snooze $TIMESTAMP promql/fragile

Where $TIMESTAMP is either use RFC3339 formatted or YYYY-MM-DD. Adding this comment will disable promql/fragile until $TIMESTAMP, after that check will be re-enabled.