Static variables

Creating a variable

To create a variable, click on the settings icon on the top right corner of the dashboard.

The click on Add variable button.

You will see following options:

1. Query values
2. Dynamic variables
3. Constant
4. Text box
5. Custom

1. Query values

Query values are used to fetch distinct values from a field in a single stream. e.g. You can pick the hostname or k8s namespace from a stream and use it as a filter.

This will give you a drop down of all the distinct values from the field you selected.

You could then use this variable in a chart query. Below are 2 ways to use a variable in a query:

1. '$variable_name' - This will replace the variable with the value selected by the user in a filter either in Auto or Custom SQL mode.
2. "$variable_name" - This will replace the variable with the value selected by the user in PromQL mode.

SQL example:

PromQL example:

Other variable types

TBD