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.

Documentation Grafana documentation Templates and variables Filter variables with regex

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:

text Copy

backend_01
backend_02
backend_03
backend_04

Filter so that only the options that end with 01 or 02 are returned:

Regex:

regex Copy

/.*[01|02]/

Result:

text Copy

backend_01
backend_02

Filter and modify the options using a regex capture group to return part of the text:

Regex:

regex Copy

/.*(01|02)/

Result:

text Copy

01
02

Filter and modify - Prometheus Example

List of options:

text Copy

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:

regex Copy

/.*instance="([^"]*).*/

Result:

text Copy

demo.robustperception.io:9090
demo.robustperception.io:9093
demo.robustperception.io:9100

Copy