Docker Kafka w/ Python consumer

Question

I am using dockerized Kafka and written one Kafka consumer program. It works perfectly when I run Kafka in docker and application at my local machine. But when I configured

Answer 1

In my case I wanted to access the Kafka Container from an external python client running locally (as a producer) and here is the combination of containers and python code that worked for me (Platform MAC OS and docker version 2.4.0):

zookeeper container:

docker run -d \
-p 2181:2181 \
--name=zookeeper \
-e ZOOKEEPER_CLIENT_PORT=2181 \
confluentinc/cp-zookeeper:5.2.3

kafka container:

docker run -d \ 
-p 29092:29092 \ 
-p 9092:9092 \ 
--name=kafka \ 
-e KAFKA_ZOOKEEPER_CONNECT=host.docker.internal:2181 \ 
-e KAFKA_LISTENER_SECURITY_PROTOCOL_MAP=BROKER:PLAINTEXT,PLAINTEXT:PLAINTEXT \ 
-e KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://kafka:29092,BROKER://localhost:9092 \ 
-e KAFKA_INTER_BROKER_LISTENER_NAME=BROKER \ 
-e KAFKA_BROKER_ID=1 \ 
-e KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR=1 \ 
-e KAFKA_CREATE_TOPICS="test:1:1" \ 
confluentinc/cp-enterprise-kafka:5.2.3

python client:

from kafka import KafkaProducer
import json
producer = KafkaProducer(bootstrap_servers=['localhost:29092'],
value_serializer=lambda v: json.dumps(v).encode('utf-8'),
security_protocol='PLAINTEXT')
acc_ini = 523416
print("Sending message")
producer.send('test', {'model_id': '1','acc':str(acc_ini), 'content':'test'})
producer.flush()