我有以下docker-compose文件:
version: '3.1'
services:
postgres_db:
image: postgres
restart: always
environment:
POSTGRES_USER: admin
POSTGRES_PASSWORD: admin
POSTGRES_DB: default_db
ports:
- 54320:5432
zookeeper:
image: wurstmeister/zookeeper
ports:
- "2181:2181"
kafka:
image: wurstmeister/kafka
ports:
- "9092:9092"
environment:
KAFKA_ADVERTISED_HOST_NAME: kafka
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_CREATE_TOPICS: "test:1:1"
volumes:
- /var/run/docker.sock:/var/run/docker.sock
使用docker-compose up
运行后-终端输出看起来一切正常。我启动一个python控制台并运行以下行:
kp = KafkaProducer(bootstrap_servers=['localhost:9092'],api_version=(0,10),
value_serializer=lambda x:
dumps(x).encode('utf-8'))
kc = KafkaConsumer('test', bootstrap_servers=['localhost:9092'],api_version=(0,10),group_id=None,auto_offset_reset='earliest',
value_deserializer=lambda json_data: json.loads(json_data.decode('utf-8')))
data = {"test":"test"}
kp.send(topic="test",value=data)
for message in kc:
print(message.value)
但是运行此命令后,控制台只是挂起,看起来好像消息已被消耗/产生。任何想法出什么问题了吗?谢谢!
要么您需要在容器中运行Python代码并进行设置
bootstrap_servers=['kafka:9092']
或者您需要将Kafka播回给主机上的客户端
KAFKA_ADVERTISED_HOST_NAME: localhost
您也可以阅读有关HOSTNAME_COMMAND
的wurstmeister自述文件
我还建议您在测试生产者和消费者时分别运行它们