@opentelemetry/instrumentation-kafkajs

OpenTelemetry kafkajs Instrumentation for Node.js

This module provides automatic instrumentation for the kafkajs package, which may be loaded using the @opentelemetry/sdk-trace-node package and is included in the @opentelemetry/auto-instrumentations-node bundle.

If total installation size is not constrained, it is recommended to use the @opentelemetry/auto-instrumentations-node bundle with @opentelemetry/sdk-node for the most seamless instrumentation experience.

Compatible with OpenTelemetry JS API and SDK 1.0+.

Installation

npm install --save @opentelemetry/instrumentation-kafkajs

Supported versions

• kafkajs versions >=0.3.0 <3

Usage

const { NodeTracerProvider } = require('@opentelemetry/sdk-trace-node');
const {
  KafkaJsInstrumentation,
} = require('@opentelemetry/instrumentation-kafkajs');
const { registerInstrumentations } = require('@opentelemetry/instrumentation');

const provider = new NodeTracerProvider();
provider.register();

registerInstrumentations({
  instrumentations: [
    new KafkaJsInstrumentation({
      // see below for available configuration
    }),
  ],
});

Instrumentation Options

You can set the following:

Options	Type	Description
producerHook	KafkaProducerCustomAttributeFunction	Function called before a producer message is sent. Allows for adding custom attributes to the span.
consumerHook	KafkaConsumerCustomAttributeFunction	Function called before a consumer message is processed. Allows for adding custom attributes to the span.

Semantic Conventions

This package uses @opentelemetry/semantic-conventions version 1.30+, which implements Semantic Convention Version 1.30.0

Spans Emitted

KafkaJS Object	Action	Span Kind	Span Name	Operation Type / Name
Consumer	eachBatch	Client	poll <topic-name>	receive / poll
Consumer	eachBatch, eachMessage	Consumer	process <topic-name> [1]	process / process
Producer	send	Producer	send <topic-name>	send / send

[1] process <topic-name>: In the context of eachBatch, this span will be emitted for each message in the batch but the timing (start, end, duration) will reflect the timing of the batch.

Metrics Emitted

KafkaJS Object	Metric Name	Short Description
Consumer	messaging.process.duration	Duration of processing operation. [1]
Consumer	messaging.client.consumed.messages	Number of messages that were delivered to the application.
Consumer and Producer	messaging.client.operation.duration	Number of messages that were delivered to the application. (Only emitted for kafkajs@1.5.0 and later.)
Producer	messaging.client.sent.messages	Number of messages producer attempted to send to the broker.

[1] messaging.process.duration: In the context of eachBatch, this metric will be emitted once for each message but the value reflects the duration of the entire batch.

Attributes Collected

These attributes are added to both spans and metrics, where possible.

Attribute	Short Description
messaging.system	An identifier for the messaging system being used (i.e. "kafka").
messaging.destination.name	The message destination name.
messaging.operation.type	A string identifying the type of messaging operation.
messaging.operation.name	The system-specific name of the messaging operation.
messaging.operation.name	The system-specific name of the messaging operation.
messaging.kafka.message.key	A stringified value representing the key of the Kafka message (if present).
messaging.kafka.message.tombstone	A boolean that is true if the message is a tombstone.
messaging.kafka.offset	The offset of a record in the corresponding Kafka partition.
messaging.destination.partition.id	The identifier of the partition messages are sent to or received from, unique within the messaging.destination.name. Note: only available on producer spans.

Useful links

• For more information on OpenTelemetry, visit: https://opentelemetry.io/
• For more about OpenTelemetry JavaScript: https://github.com/open-telemetry/opentelemetry-js
• For help or feedback on this project, join us in GitHub Discussions

License

Apache 2.0 - See LICENSE for more information.

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