Commit 1caddcf9 authored by Mike Jang's avatar Mike Jang

Merge branch...

Merge branch '270107-add-metrics-yml-file-for-usage-data-metrics-definition-add-documentation' into 'master'

Add documentation for metrics definition

See merge request gitlab-org/gitlab!50770
parents 727307a8 a9d740d8
---
stage: Growth
group: Product Intelligence
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/#assignments
---
# Metrics Dictionary Guide
This guide describes Metrics Dictionary and how it's implemented
## Metrics Definition and validation
We are using [JSON Schema](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/schema.json) to validate the metrics definition.
This process is meant to ensure consistent and valid metrics defined for Usage Ping. All metrics *must*:
- Comply with the definied [JSON schema](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/schema.json).
- Have a unique `full_path` .
- Have an owner.
All metrics are stored in YAML files:
- [`config/metrics`](https://gitlab.com/gitlab-org/gitlab/-/tree/master/config/metrics)
Each metric is definied in a separate YAML file consisting of a number of fields:
| Field | Required | Additional information |
|---------------------|----------|----------------------------------------------------------------|
| `name` | yes | |
| `description` | yes | |
| `value_type` | yes | |
| `status` | yes | |
| `default_generation`| yes | Default generation path of the metric. One full_path value. (1) |
| `full_path` | yes | Full path of the metric for one or multiple generations. Path of the metric in Usage Ping payload. (1) |
| `group` | yes | The [group](https://about.gitlab.com/handbook/product/categories/#devops-stages) that owns the metric. |
| `time_frame` | yes | `string`; may be set to a value like "7d" |
| `data_source` | yes | `string`: may be set to a value like `database` or `redis_hll`. |
| `distribution` | yes | The [distribution](https://about.gitlab.com/handbook/marketing/strategic-marketing/tiers/#definitions) where the metric applies. |
| `tier` | yes | The [tier]( https://about.gitlab.com/handbook/marketing/strategic-marketing/tiers/) where the metric applies. |
| `product_category` | no | The [product category](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/categories.yml) for the metric. |
| `stage` | no | The [stage](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/stages.yml) for the metric. |
| `milestone` | no | The milestone when the metric is introduced. |
| `milestone_removed` | no | The milestone when the metric is removed. |
| `introduced_by_url` | no | The URL to the Merge Request that introduced the metric. |
1. The default generation path is the location of the metric in the Usage Ping payload.
The `full_path` is the list locations for multiple Usage Ping generaations.
### Example metric definition
The linked [`uuid`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/metrics/license/uuid.yml)
YAML file includes an example metric definition, where the `uuid` metric is the GitLab
instance unique identifier.
```yaml
name: uuid
description: GitLab instance unique identifier
value_type: string
product_category: collection
stage: growth
status: data_available
default_generation: generation_1
full_path:
generation_1: uuid
generation_2: license.uuid
milestone: 9.1
introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/1521
group: group::product intelligence
time_frame: none
data_source: database
distribution: [ee, ce]
tier: ['free', 'starter', 'premium', 'ultimate', 'bronze', 'silver', 'gold']
```
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