Add built in variable called __range
What does this MR do?
Add a __range variable which will be useful in Prometheus range vector selectors.
The value of this variable will be the number of seconds in the time range of the
dashboard. For example, if the dashboard time range is set to 8 hours, the value
of __range will be 28800s.
Example usage:
Instead of
sum(rate(nginx_upstream_responses_total{upstream=~"{{kube_namespace}}-{{ci_environment_slug}}-.*"}[60m])) by (status_code)
we can do
sum(rate(nginx_upstream_responses_total{upstream=~"{{kube_namespace}}-{{ci_environment_slug}}-.*"}[{{__range}}])) by (status_code)
Using __range, the query will automatically show data from the time range of the dashboard, rather than a fixed time range.
This is similar to Grafana's $__range variable.
Issue: #213923 (closed)
Screenshots
Does this MR meet the acceptance criteria?
Conformity
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Changelog entry -
Documentation (if required) -
Code review guidelines -
Merge request performance guidelines -
Style guides -
Database guides -
Separation of EE specific content
Availability and Testing
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Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process. -
Tested in all supported browsers -
Informed Infrastructure department of a default or new setting change, if applicable per definition of done
Security
If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:
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Label as security and @ mention @gitlab-com/gl-security/appsec -
The MR includes necessary changes to maintain consistency between UI, API, email, or other methods -
Security reports checked/validated by a reviewer from the AppSec team