docker-compose.yml

services:
  kafka:
    image: confluentinc/cp-kafka:latest
    ports:
      - "9092:9092"
    environment:
      CLUSTER_ID: '5qdbV-WNRhq8FYGm-z_Ziw' # Use the ID you generated
      KAFKA_NODE_ID: 1
      KAFKA_PROCESS_ROLES: 'broker,controller'
      KAFKA_CONTROLLER_LISTENER_NAMES: 'CONTROLLER'
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: 'CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT'
      KAFKA_CONTROLLER_QUORUM_VOTERS: '1@kafka:29093'
      
      # Correctly define internal and external listeners
      KAFKA_LISTENERS: 'PLAINTEXT://kafka:29092,PLAINTEXT_HOST://0.0.0.0:9092,CONTROLLER://kafka:29093'
      KAFKA_ADVERTISED_LISTENERS: 'PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092'
      
      # Settings for consumer groups
      KAFKA_GROUP_INITIAL_REBALANCE_DELAY_MS: 0
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1