# Dependencies

## Sunbird Telemetry <a href="#sunbird-telemetry" id="sunbird-telemetry"></a>

Sunbird Telemetry is a specification to instrument all the key events. Using this specification reference applications & services will generate telemetry events.

{% hint style="info" %}
Resolution : *Obsrv* as a building block serves to collect and process telemetry. Just like it works with the Sunbird telemetry spec, it can work seamlessly with any spec that a system may adopt as its choice of reference. The events generated will be in accordance with the spec of choice, and *Obsrv* can carry out validation and aggregate telemetry accordingly.
{% endhint %}

## Sunbird Lern

The User and Org service of Sunbird Lern is used for obtaining various metadata about the user - including fetching user roles & privileges to authenticate exhaust requests.

{% hint style="info" %}
Resolution: *Obsrv* uses the meta data provided by the *Lern* building block in order to gather user data. An alternate service can be used in place of L\_ern\_ to make this data available to *Obsrv* as well.
{% endhint %}

## Keycloak & Kong <a href="#sunbird-telemetry" id="sunbird-telemetry"></a>

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{% hint style="info" %}
Resolution :
{% endhint %}


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