Templating variables for metrics dashboards
GitLab 13.0から導入されました。
Templating variables can be used to make your metrics dashboard more versatile.
templating is a top-level key in the
dashboard YAML.
Define your variables in the variables key, under templating. The value of
the variables key should be a hash, and each key under variables
defines a templating variable on the dashboard, and may contain alphanumeric and underscore characters.
A variable can be used in a Prometheus query in the same dashboard using the syntax described in Using Variables.
text variable type
For each text variable defined in the dashboard YAML, there will be a free text
box on the dashboard UI, allowing you to enter a value for each variable.
The text variable type supports a simple and a full syntax.
Simple syntax
This example creates a variable called variable1, with a default value
of default value:
templating:
variables:
variable1: 'default value' # `text` type variable with `default value` as its default.
Full syntax
This example creates a variable called variable1, with a default value of default.
The label for the text box on the UI will be the value of the label key:
templating:
variables:
variable1: # The variable name that can be used in queries.
label: 'Variable 1' # (Optional) label that will appear in the UI for this text box.
type: text
options:
default_value: 'default' # (Optional) default value.
custom variable type
Each custom variable defined in the dashboard YAML creates a dropdown
selector on the dashboard UI, allowing you to select a value for each variable.
The custom variable type supports a simple and a full syntax.
Simple syntax
This example creates a variable called variable1, with a default value of value1.
The dashboard UI will display a dropdown with value1, value2 and value3
as the choices.
templating:
variables:
variable1: ['value1', 'value2', 'value3']
Full syntax
This example creates a variable called variable1, with a default value of value_option_2.
The label for the text box on the UI will be the value of the label key.
The dashboard UI will display a dropdown with Option 1 and Option 2
as the choices.
If you select Option 1 from the dropdown, the variable will be replaced with value option 1.
Similarly, if you select Option 2, the variable will be replaced with value_option_2:
templating:
variables:
variable1: # The variable name that can be used in queries.
label: 'Variable 1' # (Optional) label that will appear in the UI for this dropdown.
type: custom
options:
values:
- value: 'value option 1' # The value that will replace the variable in queries.
text: 'Option 1' # (Optional) Text that will appear in the UI dropdown.
- value: 'value_option_2'
text: 'Option 2'
default: true # (Optional) This option should be the default value of this variable.
metric_label_values variable type
Full syntax
This example creates a variable called variable2. The values of the dropdown will
be all the different values of the backend label in the Prometheus series described by
up{env="production"}.
templating:
variables:
variable2: # The variable name that can be interpolated in queries.
label: 'Variable 2' # (Optional) label that will appear in the UI for this dropdown.
type: metric_label_values
options:
series_selector: 'up{env="production"}'
label: 'backend'
