Question 83053 in Docker Question posted in
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Unable to connect Offset Explorer to Kafka running in docker

I have a docker-compose.yml file:

version: '2'
services:
  zookeeper:
    image: confluentinc/cp-zookeeper:latest
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
      ZOOKEEPER_TICK_TIME: 2000
    ports:
      - 2181:2181

  kafka:
    image: confluentinc/cp-kafka:latest
    depends_on:
      - zookeeper
    ports:
      - 9092:9092
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:29092,PLAINTEXT_HOST://localhost:9092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT
      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1

The containers (based on these 2 images from this file) works well, but I can’t connect to localhost:9092 (using offset explorer for kafka)
Could you help me understand what is wrong in this docker-compose.yml file?

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2

Answers


  1. 0

    You are missing a line like this

    KAFKA_LISTENERS: PLAINTEXT://:29092,PLAINTEXT_HOST://0.0.0.0:9092

    https://www.confluent.io/blog/kafka-listeners-explained/

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  2. 0

    Setting up the Bootstrap servers like this under Advanced tabs did the trick for me: 1.
    In the properties tab, set the Zookeeper Host and port to "localhost" and "2181" .

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