58 lines
2.2 KiB
Markdown
58 lines
2.2 KiB
Markdown
---
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stage: Verify
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group: Testing
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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
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type: reference
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---
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# Metrics Reports **(PREMIUM)**
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> [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/9788) in [GitLab Premium](https://about.gitlab.com/pricing/) 11.10. Requires GitLab Runner 11.10 and above.
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## Overview
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GitLab provides a lot of great reporting tools for [merge requests](../user/project/merge_requests/index.md) - [Unit test reports](unit_test_reports.md), [code quality](../user/project/merge_requests/code_quality.md), performance tests, etc. While JUnit is a great open framework for tests that "pass" or "fail", it is also important to see other types of metrics from a given change.
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You can configure your job to use custom Metrics Reports, and GitLab will display a report on the merge request so that it's easier and faster to identify changes without having to check the entire log.
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## Use cases
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Consider the following examples of data that can utilize Metrics Reports:
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1. Memory usage
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1. Load testing results
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1. Code complexity
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1. Code coverage stats
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## How it works
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Metrics are read from the metrics report (default: `metrics.txt`). They are parsed and displayed in the MR widget.
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All values are considered strings and string compare is used to find differences between the latest available `metrics` artifact from:
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- `master`
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- The feature branch
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## How to set it up
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Add a job that creates a [metrics report](pipelines/job_artifacts.md#artifactsreportsmetrics) (default filename: `metrics.txt`). The file should conform to the [OpenMetrics](https://openmetrics.io/) format.
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For example:
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```yaml
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metrics:
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script:
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- echo 'metric_name metric_value' > metrics.txt
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artifacts:
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reports:
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metrics: metrics.txt
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```
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## Advanced Example
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An advanced example of an OpenMetrics text file (from the [Prometheus documentation](https://github.com/prometheus/docs/blob/master/content/docs/instrumenting/exposition_formats.md#text-format-example))
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renders in the merge request widget as:
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