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The metrics format for PushTelemetryRequestV0 is OpenTelemetry Protobuf protocol definitions version 0.1011.

Future versions of PushTelemetryRequest and GetTelemetrySubscriptionsRequest may include a content-type field to allow for updated OTLP format versions (or additional formats), but this field is currently not included since only one format is specified by this proposal.

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While future protocol-level request could allow for other metrics formats, Kafka will only ship with OpenTelemetry and it is required for a client that claims support of this KIP to use the OpenTelemetry v0.10 11 protobuf format.

Metric payloads are encoded as OpenTelemetry ExportMetricsServiceRequestMetricsData protobuf objects.

Naming

Metrics will be named in a hierarchical format:

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