128 lines
4.5 KiB
Markdown
128 lines
4.5 KiB
Markdown
---
|
|
stage: Monitor
|
|
group: APM
|
|
info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#designated-technical-writers
|
|
---
|
|
|
|
# Templating variables for metrics dashboards **(CORE)**
|
|
|
|
> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/214539) in GitLab 13.0.
|
|
|
|
Templating variables can be used to make your metrics dashboard more versatile.
|
|
|
|
`templating` is a top-level key in the
|
|
[dashboard YAML](yaml.md#dashboard-top-level-properties).
|
|
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](variables.md).
|
|
|
|
## `text` variable type
|
|
|
|
CAUTION: **Warning:**
|
|
This variable type is an _alpha_ feature, and is subject to change at any time
|
|
without prior notice!
|
|
|
|
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`:
|
|
|
|
```yaml
|
|
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:
|
|
|
|
```yaml
|
|
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
|
|
|
|
CAUTION: **Warning:**
|
|
This variable type is an _alpha_ feature, and is subject to change at any time
|
|
without prior notice!
|
|
|
|
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.
|
|
|
|
```yaml
|
|
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`:
|
|
|
|
```yaml
|
|
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
|
|
|
|
CAUTION: **Warning:**
|
|
This variable type is an _alpha_ feature, and is subject to change at any time
|
|
without prior notice!
|
|
|
|
### 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"}`.
|
|
|
|
```yaml
|
|
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'
|
|
```
|