How to show series name in Time Series chart legend

Grafana Dashboards
1

  • What Grafana version and what operating system are you using?

    • grafana version 12.1.0
    • OS: Raspberry Pi OS lite Bookworm

  • What are you trying to achieve?

    • Create a dashboard to monitor my lan performance metrics

  • How are you trying to achieve it?

    • Python script populates influxdb. Grafana for visualization
    • I have created a dashboard and a visualization panel in that dashboard. The panel has a query to fetch the data from the db. The data is fetched correctly.
    • I have also, based on instructions online, created a dashboard “variable”.

  • What happened?

    • Data is accessible. I’m attempting to create a Time series chart for ping measurement to various servers. The DB contains “tags” for each server
    • If I don’t use any template variable, the legend displays the full content of the db value (f.e.: ping_monitor.latency_avg { target: amazon_com })
    • If I use the dashboard variable, it shows a dropdown on the top-left above the chart where I can select one or more series. If I use the variable in the “Alias by Name” field, all the legend options show the value selected in the drop-down.

  • What did you expect to happen?

    • The different “tag” series are shown as their own time-series lines in the chart.
    • The legend displays the tag name correctly

  • Can you copy/paste the configuration(s) that you are having problems with?

    • N/A

  • Did you receive any errors in the Grafana UI or in related logs? If so, please tell us exactly what they were.
    ** N/A

  • Did you follow any online instructions? If so, what is the URL?

Screenshots:

Grafana - Panel Editor 1
Grafana - Panel Editor 12204Ă—1633 179 KB

2

Hi, did you try setting Display Name (a setting on the right panel, closer to the bottom end of the settings) to ${__series.name}? That should work. You can also check other stuff you can write there in Data Links section, just type $ sign in the link section and there will be a popup with all the fields you can use, but the one I said I think would work for you

3

Hello,
Thank you for the tip. I tried this but it did not work for me. The legend is still showing in the form “ping_monitor.jitter { target: quad9_dns }”

I didn’t quite get it about the data links section. When I go to that section, click on add link, it asks me for a title and a link. Trying to type $ in the Title field doesn’t show any popup.

4

Ok, I’m also not very fluent in InfluxDB, but wouldn’t your query need something like WHERE target = $target? And not using alias as the variable? In PromQL you would need to pass the variable to the query, not to the legend.

1 Like
5

But wouldn’t that only show the graph for the selected value of the variable (for example amazon_com as in the screenshot). What I want to do is display the latency for all the “targets” in a single graph

6

I still think using it in Alias field is what causing all the legends to be called that. Can you delete it and see what happens? Then can you share a screenshot of table view toggled (right beside the time picker)?

7

It shows the full “tag”
Removed the $target from the alias field and this is how it appears:

Grafana - Panel Editor - Empty Alias Field
Grafana - Panel Editor - Empty Alias Field2172Ă—1541 205 KB

Grafana - Panel Editor - Empty Alias Field - Table View
Grafana - Panel Editor - Empty Alias Field - Table View2189Ă—1549 193 KB

8

Do I understand correctly that you want to see the name of the “target” in the legend, not the metric name? So you’d like to have your legend be of labels “amazon_com”, “cloudflare_dns_primary” etc? If so, try typing $tag_target in the Alias by input.