docker-compose bitnami kafka container I have no name

Question

I'm trying to get a kafka instance going inside a docker container. The docker-compose.yml looks like this:

version: '2'

services:
  zookeeper:
    image: 'bitnami/zookeeper:3'
    ports:
      - '2181:2181'
    volumes:
      - 'zookeeper_data:/bitnami'
    environment:
      - ALLOW_ANONYMOUS_LOGIN=yes
  kafka:
    image: 'bitnami/kafka:2'
    ports:
      - '9092:9092'
    volumes:
      - 'kafka_data:/bitnami'
    environment:
      - KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper:2181
      - ALLOW_PLAINTEXT_LISTENER=yes
      - KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9092
      - KAFKA_CREATE_TOPICS=A_TOPIC,ANOTHER_TOPIC
    depends_on:
      - zookeeper

volumes:
  zookeeper_data:
    driver: local
  kafka_data:
    driver: local

The container gives no evident errors when I run docker-compose up . However, when I connect to the container's shell

docker exec -it [container] /bin/bash

I see

I have no name!@7fe183af5e2a:/$

where 7fe183af5e2a is the container.

Any reason for I have no name! ? Am I missing something simple?

Answer 1

If you look at the Dockerfile for the Kafka image (the Zookeeper one is similar), you'll see that the user used in the container is the one with the uid 1001 .

So when you see I have no name.@... , this simply means that there is no user mapped to the uid 1001. You can verify that if you look into the file /etc/passwd you won't see any entry for a user with the id 1001.