docker-compose.yml

services:
  kafka:
    image: apache/kafka:latest
    container_name: kafka
    ports:
      - "9092:9092"
      - "29092:29092"
    environment:
      # ---- KRaft core ----
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: broker,controller
      KAFKA_CONTROLLER_QUORUM_VOTERS: 1@kafka:9093

      # ---- Listeners (ALL roles must appear here) ----
      KAFKA_LISTENERS: PLAINTEXT://0.0.0.0:9092,PLAINTEXT_EXTERNAL://0.0.0.0:29092,CONTROLLER://0.0.0.0:9093

      # ---- Advertised addresses ----
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_EXTERNAL://localhost:29092

      # ---- Controller configuration ----
      KAFKA_CONTROLLER_LISTENER_NAMES: CONTROLLER
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT

      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_REPLICATION_FACTOR: 1
      KAFKA_TRANSACTION_STATE_LOG_MIN_ISR: 1

      # ---- Protocol mapping ----
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_EXTERNAL:PLAINTEXT,CONTROLLER:PLAINTEXT

      # ---- Storage ----
      KAFKA_LOG_DIRS: /tmp/kraft-combined-logs

  kafka-ui:
    image: provectuslabs/kafka-ui:latest
    container_name: kafka-ui
    depends_on:
      - kafka
    ports:
      - "8080:8080"
    environment:
      KAFKA_CLUSTERS_0_NAME: local-kafka
      KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS: kafka:9092