Add client-side Apache Kafka® producer and consumer Datadog metrics

When you enable the Datadog integration in Aiven for Apache Kafka®, the service supports all of the broker-side metrics listed in the Datadog Kafka integration documentation and allows you to send additional custom metrics.

Additionally, you can collect client-side metrics directly from the producer or consumer and send them to Datadog. For guidance, refer to the Missing producer and consumer metrics section in the Datadog documentation, which outlines the process for integrating missing metrics natively for Java-based producers and consumers. For clients using languages other than Java, incorporating these metrics can be achieved through DogStatsD.