How to Create A Dropdown Variable With Tag Values In A Grafana?

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To create a dropdown variable with tag values in Grafana, you can add a variable in the dashboard settings and choose the type as "Query". In the query field, you can enter a PromQL query that fetches the tag values you want to display in the dropdown. Once you have set up the query, you can enable "Multi-value" and "Include All" options if you want to allow multiple values to be selected and include an option for selecting all values. Save the variable and add it to your dashboard as a dropdown component. Now, when you view the dashboard, you will see a dropdown menu with the tag values retrieved from the query.

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How to create hierarchical dropdown variables in Grafana?

To create hierarchical dropdown variables in Grafana, you can follow these steps:

  1. Go to the dashboard where you want to create the hierarchical dropdown variable.
  2. Click on the dashboard settings (the gear icon) in the top-right corner of the screen.
  3. In the settings menu, click on "Variables" in the left sidebar.
  4. Click on "New" to create a new variable.
  5. In the "Name" field, give your variable a name.
  6. In the "Type" dropdown menu, select "Query" as the type of variable.
  7. In the "Data source" dropdown menu, select the data source from which you want to populate the dropdown options.
  8. In the "Query" field, write a query that will fetch the data for the first level of the hierarchy. For example, if you are creating a dropdown for countries, the query might look something like "SELECT DISTINCT(country) FROM table_name".
  9. In the "Multi-value" dropdown menu, select whether you want to allow multiple selections in the dropdown.
  10. Click on "Add query" to add additional queries for each level of the hierarchy. For example, you could add another query to fetch the cities within the selected country.
  11. Repeat step 10 for each level of the hierarchy.
  12. Click on "Save" to save the variable.
  13. Go back to your dashboard and add a panel where you want to use the hierarchical dropdown variable.
  14. In the panel settings, click on the dropdown menu next to the field where you want to use the variable, and select the variable you just created.
  15. The dropdown menu should now populate with the hierarchical options based on the queries you configured.
  16. You can now use the dropdown variable to filter the data displayed in your panel based on the selected hierarchy.


How to create tags for dropdown variables in Grafana?

To create tags for dropdown variables in Grafana, follow these steps:

  1. Open your Grafana dashboard and click on the settings icon in the top right corner of the screen.
  2. In the left sidebar menu, click on the "Variables" option.
  3. Click on the "New" button to create a new variable.
  4. Choose the type of variable you want to create (e.g. Query, Custom, etc.).
  5. In the "Tags" field, enter the tags you want to assign to this variable. Separate multiple tags with a comma.
  6. Save your changes and close the variable settings window.
  7. To use the tags in a dropdown menu, add the variable to a dashboard panel by clicking on the "Add panel" button and selecting the variable from the dropdown menu.
  8. The tags you entered in the variable settings will now appear as options in the dropdown menu on the dashboard panel.


By following these steps, you can create tags for dropdown variables in Grafana and use them to filter and customize your dashboard visuals.


How to use regex patterns in dropdown variables in Grafana?

To use regex patterns in dropdown variables in Grafana, follow these steps:

  1. In Grafana, navigate to the dashboard where you want to use the regex pattern in the dropdown variable.
  2. Click on the "Settings" icon in the top right corner of the dashboard.
  3. In the settings menu, click on "Variables" to open the variables tab.
  4. Click on the variable that you want to apply the regex pattern to.
  5. In the variable configuration panel, under the "Regex" section, enter the desired regex pattern in the "Regex" field. For example, if you want to filter for values that start with a specific prefix, you could use the regex pattern "^prefix.*".
  6. Save the changes to the variable configuration.
  7. Now when using the dropdown variable in a panel or query, the regex pattern will be applied to filter the available options based on the predefined pattern.


By following these steps, you can effectively use regex patterns in dropdown variables in Grafana to filter and refine the available options based on your requirements.


What is the significance of tags in dropdown variables in Grafana?

Tags in dropdown variables in Grafana are significant as they allow users to filter and narrow down the data they are viewing in the dashboard. By using tags, users can easily select specific values from the dropdown menu to customize their view and analyze the data more effectively. Tags can categorize and organize data, making it easier for users to find and select the information they need. This can improve the user experience and help users quickly access the data that is most relevant to their analysis.

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