Kafka Architecture Diagram Template

What this template is for

A Kafka architecture diagram shows how producers, the Kafka cluster, and consumer groups fit together. This template lays out the canonical shape: producers on top emitting messages, a cluster of brokers in the middle holding a partitioned topic, Zookeeper or KRaft providing cluster coordination, and consumer groups at the bottom — each group receives every message, while consumers within a group split partitions among themselves. Use it to design a Kafka deployment, document an existing one, or explain why scaling consumers means adding partitions, not just consumer instances.

When to use this template

• Design a Kafka deployment before sizing brokers and partitions.
• Explain to a stakeholder how consumer groups deliver messages once-per-group.
• Document a topic's partition strategy and consumer-to-partition mapping.
• Plan replication and broker failover for a fault-tolerant cluster.
• Show how Zookeeper (or KRaft mode) provides cluster metadata and leader election.
• Compare Kafka against RabbitMQ or other brokers by pointing to the partition model.

How to use it

1. 1Draw the producer layer at the top — services publishing messages to topics.
2. 2Add the Kafka cluster as a frame containing multiple brokers.
3. 3Add a topic inside the cluster, labeled with partition count.
4. 4Add Zookeeper or KRaft beside the cluster for coordination.
5. 5Draw consumer groups at the bottom — each group is a logical subscriber.
6. 6Show consumers inside each group; they split partitions among themselves.

Quick example