For Compose basics, see the Docker Compose overview. This post covers a single-node Kafka broker in KRaft mode with Kafka UI. Zookeeper is no longer required; it was removed in Kafka 4.0.

Prerequisites

• Docker Compose installed

Configuration

The following configuration spins up a single-node Kafka broker in KRaft mode with the Kafka UI tool.

The Kafka broker address is localhost:29092, and Kafka UI is available at http://localhost:8085.

# docker-compose.yml
services:
  kafka:
    image: apache/kafka:4.3.0
    hostname: kafka
    ports:
      - '29092:29092'
    environment:
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka:29093
      KAFKA_LISTENERS: CONTROLLER://:29093,PLAINTEXT://:9092,PLAINTEXT_HOST://:29092
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:29092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1
      CLUSTER_ID: MkU3OEVBNTcwNTJENDM2Qk
  kafka-ui:
    image: provectuslabs/kafka-ui:latest
    ports:
      - 8085:8080
    depends_on:
      - kafka
    environment:
      KAFKA_CLUSTERS_0_NAME: local
      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka:9092

Run the following command to spin up the containers.

docker compose up

Demo

Docker Compose files for this post live in the kafka-docker-compose folder. Get access via code demos.