# Heroku **Status:** ![Development](https://img.shields.io/badge/-development-blue) **type:** `heroku` **Description:** [Heroku dyno metadata](https://devcenter.heroku.com/articles/dyno-metadata) | Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability | |---|---|---|---|---|---| | [`heroku.app.id`](/docs/registry/attributes/heroku.md) | string | Unique identifier for the application | `2daa2797-e42b-4624-9322-ec3f968df4da` | `Opt-In` | ![Development](https://img.shields.io/badge/-development-blue) | | [`heroku.release.commit`](/docs/registry/attributes/heroku.md) | string | Commit hash for the current release | `e6134959463efd8966b20e75b913cafe3f5ec` | `Opt-In` | ![Development](https://img.shields.io/badge/-development-blue) | | [`heroku.release.creation_timestamp`](/docs/registry/attributes/heroku.md) | string | Time and date the release was created | `2022-10-23T18:00:42Z` | `Opt-In` | ![Development](https://img.shields.io/badge/-development-blue) | **Mapping:** | Dyno metadata environment variable | Resource attribute | |------------------------------------|-------------------------------------| | `HEROKU_APP_ID` | `heroku.app.id` | | `HEROKU_APP_NAME` | `service.name` | | `HEROKU_DYNO_ID` | `service.instance.id` | | `HEROKU_RELEASE_CREATED_AT` | `heroku.release.creation_timestamp` | | `HEROKU_RELEASE_VERSION` | `service.version` | | `HEROKU_SLUG_COMMIT` | `heroku.release.commit` | Additionally, [the `cloud.provider` resource attribute MUST be set to `heroku`](../cloud.md).