我正在开发一个应用程序,该应用程序从sqs队列中读取一条消息,对该数据进行一些处理,然后获取结果并发布到kafka主题。为了在本地测试,我想在我的docker构建中设置一个kafka映像。我目前能够使用docker-compose在本地启动aws-cli,localstack和我的应用程序的容器。另外,我也可以毫无问题地启动kafka和zookeper。我无法使我的应用程序与kafka通信。
我尝试使用两个单独的撰写文件,并且还弄乱了网络。最后,我引用了:https://rmoff.net/2018/08/02/kafka-listeners-explained/。
这是我的docker-compose文件:
version: '3.7'
services:
localstack:
image: localstack/localstack:latest
container_name: localstack
env_file: .env
ports:
# Localstack endpoints for various API. Format is localhost:container
- '4563-4584:4563-4584'
- '8080:8080'
environment:
- SERVICES=sns:4575,sqs:4576
- DATA_DIR=/tmp/localstack/data
volumes:
# store data locally in 'localstack' folder
- './localstack:/tmp/localstack'
networks:
- my_network
aws:
image: mesosphere/aws-cli
container_name: aws-cli
# copy local JSON_DATA folder contents into aws-cli container's app folder
#volumes:
# - ./JSON_DATA:/app
env_file: .env
# bash entrypoint needed for multiple commands
entrypoint: /bin/sh -c
command: >
" sleep 10;
aws --endpoint-url=http://localstack:4576 sqs create-queue --queue-name input_queue;
aws --endpoint-url=http://localstack:4575 sns create-topic --name input_topic;
aws --endpoint-url=http://localstack:4575 sns subscribe --topic-arn arn:aws:sns:us-east-2:123456789012:example_topic --protocol sqs --notification-endpoint http://localhost:4576/queue/input_queue; "
networks:
- my_network
depends_on:
- localstack
my_app:
build: .
image: my_app
container_name: my_app
env_file: .env
ports:
- '9000:9000'
networks:
- my_network
depends_on:
- localstack
- aws
zookeeper:
image: confluentinc/cp-zookeeper:5.0.0
container_name: zookeeper
ports:
- 2181:2181
environment:
ZOOKEEPER_CLIENT_PORT: 2181
networks:
- my_network
kafka:
image: confluentinc/cp-kafka:5.0.0
ports:
- 9092:9092
depends_on:
- zookeeper
environment:
# For more details see See https://rmoff.net/2018/08/02/kafka-listeners-explained/
KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
KAFKA_ADVERTISED_LISTENERS: INSIDE://localhost:9092
KAFKA_LISTENERS: INSIDE://localhost:9092
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INSIDE:PLAINTEXT
KAFKA_INTER_BROKER_LISTENER_NAME: INSIDE
KAFKA_CREATE_TOPICS: "output_topic:2:2"
networks:
- my_network
networks:
my_network:
我希望不会因为发布到该主题而出现错误。相反,我得到:
kafka: client has run out of available brokers to talk to (Is your cluster reachable?)
任何想法我可能做错了什么?谢谢您的帮助。
答案 0 :(得分:1)
通过将侦听器仅设置为本地主机,可以使代理仅在Kafka容器本身(或从主机到容器)中可解析。
如果您希望另一个Docker服务能够访问该容器,则必须将<some protocol>://kafka:<some port>
添加到广告侦听器中,并listeners
不是本地主机
协议也添加到KAFKA_LISTENER_SECURITY_PROTOCOL_MAP
FWIW,该博客应涵盖所有这些基础。