Add Kafka Consumer Group to Kafka Instrumentation

What problem do you want to solve?

When a Kafka topic is shared among multiple consumer groups, the current Kafka consumer span doesn't include consumer group information. As a result, it is impossible to distinguish which consumer group a given span belongs to.

The attribute of consumer group is defined as messaging.consumer.group.name in semconv

Describe the solution you'd like

Extract the group id from the instance config as shown below:

consumer_group = (KafkaPropertiesExtractor.extract_consumer_group(instance))

def extract_consumer_group(instance) -> Optional[str]:
    try:
        return instance.config.get("group_id")
    except AttributeError:
        return None

Describe alternatives you've considered

No response

Additional Context

No response

Would you like to implement a fix?

None

Tip

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Start with the Kafka instrumentation's consumer span and the proposed KafkaPropertiesExtractor.extract_consumer_group entry point. Verify that the consumer group's instance config value is associated with the messaging.consumer.group.name semantic-convention attribute and that the resulting span distinguishes consumer groups.