Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.
Filter variables with regex
Using the Regex Query option, you filter the list of options returned by the variable query or modify the options returned.
This page shows how to use regex to filter/modify values in the variable dropdown.
Using the Regex Query Option, you filter the list of options returned by the Variable query or modify the options returned. For more information, refer to the Mozilla guide on Regular expressions.
Examples of filtering on the following list of options:
backend_01
backend_02
backend_03
backend_04
Filter so that only the options that end with 01
or 02
are returned:
Regex:
/.*[01|02]/
Result:
backend_01
backend_02
Filter and modify the options using a regex capture group to return part of the text:
Regex:
/.*(01|02)/
Result:
01
02
Filter and modify - Prometheus Example
List of options:
up{instance="demo.robustperception.io:9090",job="prometheus"} 1 1521630638000
up{instance="demo.robustperception.io:9093",job="alertmanager"} 1 1521630638000
up{instance="demo.robustperception.io:9100",job="node"} 1 1521630638000
Regex:
/.*instance="([^"]*).*/
Result:
demo.robustperception.io:9090
demo.robustperception.io:9093
demo.robustperception.io:9100