Correct docker-compose for zookeeper, kafka, and kafka-ui

[vysogot]

Hi! I'm using the default karafka docker-compose.yml. I added the kafka-ui part from kafka-ui repo.
The issue is that kafka-ui can't connect to kafka. How should this file be corrected?

version: '2'
services:
  zookeeper:
    container_name: karafka_20_zookeeper
    image: wurstmeister/zookeeper
    restart: on-failure
    ports:
      - '2181:2181'

  kafka:
    container_name: karafka_20_kafka
    image: wurstmeister/kafka
    ports:
      - '9092:9092'
    environment:
      KAFKA_ADVERTISED_HOST_NAME: localhost
      KAFKA_ADVERTISED_PORT: 9092
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'
      KAFKA_CREATE_TOPICS:
        "benchmarks_00_01:1:1,\
         benchmarks_00_05:5:1,\
         benchmarks_01_05:5:1,\
         benchmarks_00_10:10:1"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
    restart: on-failure
  kafka-ui:
    image: provectuslabs/kafka-ui
    container_name: kafka-ui
    ports:
      - "8080:8080"
    restart: always
    environment:
      - KAFKA_CLUSTERS_0_NAME=local
      - KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=kafka:9092

kafka-ui log:

2022-12-31 10:04:53 2022-12-31 09:04:53,327 INFO  [main] o.s.b.w.e.n.NettyWebServer: Netty started on port 8080
2022-12-31 10:04:53 2022-12-31 09:04:53,429 INFO  [main] c.p.k.u.KafkaUiApplication: Started KafkaUiApplication in 24.228 seconds (JVM running for 27.364)
2022-12-31 10:10:49 2022-12-31 09:10:49,656 WARN  [kafka-admin-client-thread | kafka-ui-admin-client-1672477493568] o.a.k.c.NetworkClient: [AdminClient clientId=kafka-ui-admin-client-1672477493568] Connection to node 1002 (localhost/127.0.0.1:9092) could not be established. Broker may not be available.

Connection to node 1002 (localhost/127.0.0.1:9092) could not be established. Broker may not be available.

[Haarolean]

HI, your issue is KAFKA_ADVERTISED_HOST_NAME. It contains "localhost" which is a kafka container's host. But you access the kafka from another container which has a different host.
Please refer to one of our examples