Modifying Series Display Name

Grafana Time Series Panel
1

Hello - I am using Grafana 8.3.4 with a Graphite data source. Both Grafana and Graphite reside on CentoOS 8. I have the following panel:

Screen Shot 2022-01-23 at 1.24.25 PM
Screen Shot 2022-01-23 at 1.24.25 PM1334×1090 250 KB

I am trying to change the display name to use just the text that follows the period. In the first series I want to display only VRF_Training and the second series should be Home, etc. I believe the proper way to do this is to create a dashboard variable that extracts the field of interest and then update the panel Standard options called Display name.

Screen Shot 2022-01-23 at 1.31.31 PM
Screen Shot 2022-01-23 at 1.31.31 PM1428×1206 110 KB

When I change the Display name to $pages my thinking is that I should see the the last part of the query results. However, instead what i am seeing is

Screen Shot 2022-01-23 at 1.31.59 PM
Screen Shot 2022-01-23 at 1.31.59 PM1354×512 116 KB

Can someone tell me what I am going wrong and how to accomplish my goal?

Thank you.

2

Unless I have misunderstood your needs, I think setting up variables is not necessary. Have you tried using an Override as shown in the mockup below?

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image2387×1262 252 KB

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3

Hello. No you did not understand. I have reviewed the Override feature and it appears exactly what I need. Thank you. I have follow up question. Since I have MANY panels with different page names, I will need to use a Match with RegEx. I cannot seem to find the right way to reference the RegEx capture group. Do you know where that is documented?

4

Hello again. As it turns out the solution to my issue is to use a Transformation, specifically using Rename by RegEx.

5

Hi, I got a similar requirement as your case, can you please show how to use those “transformation”?

6

I needed to do the same thing and this is how I did it:
Edit Query
Click ‘Transform’ tab (search in browser if you don’t see it)
Click ‘Add transformation’
Choose ‘Rename by regex’

I had a string like this: host:traffic.non_negative_derivative {host: 10.0.2.57}
and wanted just the IP address, so here is the regex I used for the Match: .*host\:\s(.*)\}$

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