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[英]Cannot connect to Docker Postgres server through Airflow DAG
[英]Cannot connect to single-node Kafka server through Docker
我正在尝试通过Docker连接到单节点Kafka服务器,但出现以下错误:
%3|1529395526.480|FAIL|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused
%3|1529395526.480|ERROR|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: localhost:9092/bootstrap: Connect to ipv4#127.0.0.1:9092 failed: Connection refused
%3|1529395526.480|ERROR|rdkafka#producer-1| [thrd:localhost:9092/bootstrap]: 1/1 brokers are down
docker-compose.yml文件的内容如下:
version: '2'
services:
zookeeper:
image: confluentinc/cp-zookeeper:latest
network_mode: host
environment:
ZOOKEEPER_CLIENT_PORT: 2181
ZOOKEEPER_TICK_TIME: 2000
extra_hosts:
- "moby:127.0.0.1"
kafka:
image: confluentinc/cp-kafka:latest
network_mode: host
depends_on:
- zookeeper
environment:
KAFKA_BROKER_ID: 1
KAFKA_ZOOKEEPER_CONNECT: localhost:2181
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092
KAFKA_ADVERTISED_HOSTNAME: kafka
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
extra_hosts:
- "moby:127.0.0.1"
schema_registry:
image: confluentinc/cp-schema-registry
hostname: schema_registry
depends_on:
- zookeeper
- kafka
ports:
- "8081:8081"
environment:
SCHEMA_REGISTRY_HOST_NAME: schema_registry
SCHEMA_REGISTRY_KAFKASTORE_CONNECTION_URL: '127.0.0.1:2181'
Dockerfile的内容如下:
FROM python:2
WORKDIR /kafkaproducerapp
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt
COPY . .
CMD [ "python", "./BackOffice_Producer.py" ]
我究竟做错了什么?
你需要这个:
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:29092,PLAINTEXT_HOST://localhost:9092
否则,Kafka经纪人会告诉所有连接的人,它可以在localhost:9092
上找到,该localhost:9092
无法在其他容器上运行。 在您的其他容器中,将kafka:29092
用作代理主机和端口,并将zookeeper:2181
用作Zookeeper。
从本地主机,您可以在9092上访问您的代理(假设您公开了端口)。
查看此docker-compose的完整示例
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