regexgrafana

Regex in Grafana

I want to write a regex in the variables page for a query. The regex should - exclude all values starting with "$.artemis" OR Values starting with "notif."

Solution

  • Try using (?!\$\.artemis|notif\.)(.+). We use a negative lookahead assertion with (?!...) to make sure we do not match anything starting with notif. or $.artemis. Example:

    >>> import re
>>> pattern = re.compile(r"(?!\$\.artemis|notif\.)(.+)")
>>> pattern.match("hello") # Match
<re.Match object; span=(0, 5), match='hello'>
>>> pattern.match("$hello") # Match
<re.Match object; span=(0, 6), match='$hello'>
>>> pattern.match("$.artemis") # No match
>>> pattern.match("$.artemiswithsomething") # No match
>>> pattern.match("notif.") # No match
>>> pattern.match("notif.a") # No match
>>> pattern.match("notifwithoutfullstop") # Match
<re.Match object; span=(0, 20), match='notifwithoutfullstop'>