prometheusgrafanagrafana-variable

Grafana query variable regex replacement

Hello I'd like to create a variable with label_value and then replace the label by some regexp. The value should be entire string, the text should be only part which starts with uppercase (e.g. ManualAllocationPolicy:pending. I guess the regular expression is quite good, but it's not displayed as I want. What am I missing? Grafana version is 9.4.7

variable

select

Solution

  • This is more of the regex problem, then Grafana problem. Your application of alteration for regex is incorrect: in case of alteration only one of groups will be matched (text in your exact case).

    To match same text multiple times you'll need to employ a trick: capturing groups inside of lookaheads.

    Your regex will look like this: ^(?=.*?(?<text>[A-Z].*))(?<value>.+)

    For metric name

    elasticsearch_sync_queue_lowerlevelgiberishManualAllocationPolicy:pending

    It will produce two groups:

    Demo of this regex matching online here. Matched groups can be seen on the right panel.