我也必须这样做！如果我不想使用 wurstmeister 图片怎么办？我决定制作一个自定义脚本来完成这项工作，并在单独的容器中运行此脚本。
存储库
https://github.com/yan-khonski-it/kafka-compose
注意，它适用于使用 zookeeper 的 kafka 版本。
Is Zookeeper a must for Kafka?
用你的所有主题和 zookeeper 开始 kafka - docker-compose up -d。
实现细节。
docker-compose.yml
# These services are kafka related. This docker-compose allows to start kafka locally quickly.
version: '2.1'
networks:
demo-network:
name: demo-network
driver: bridge
services:
zookeeper:
image: "confluentinc/cp-zookeeper:${CONFLUENT_PLATFORM_VERSION}"
container_name: zookeeper
environment:
ZOOKEEPER_CLIENT_PORT: 32181
ZOOKEEPER_TICK_TIME: 2000
ports:
- 32181:32181
hostname: zookeeper
networks:
- demo-network
kafka:
image: "confluentinc/cp-kafka:${CONFLUENT_PLATFORM_VERSION}"
container_name: kafka
hostname: kafka
ports:
- 9092:9092
- 29092:29092
environment:
KAFKA_ZOOKEEPER_CONNECT: zookeeper:32181
KAFKA_BROKER_ID: 1
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://localhost:9092,PLAINTEXT_HOST://kafka:29092
LISTENERS: PLAINTEXT://0.0.0.0:9092
KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
volumes:
- /var/run/docker.sock:/var/run/docker.sock
depends_on:
- "zookeeper"
networks:
- demo-network
# Automatically creates required kafka topics if they were not created.
kafka-topics-creator:
build:
context: kafka-topic-creator
dockerfile: Dockerfile
container_name: kafka-topics-creator
depends_on:
- zookeeper
- kafka
environment:
ZOOKEEPER_HOSTS: "zookeeper:32181"
KAFKA_TOPICS: "topic_v1 topic_v2"
networks:
- demo-network
然后我有一个目录kafka-topics-creator。
在这里，我有三个文件
create-kafka-topics.sh, Dockerfile, README.md.
Dockerfile
# It is recommened to use same version as kafka broker is used.
# So no additional images are pulled.
FROM confluentinc/cp-kafka:4.1.2
WORKDIR usr/bin
# Once it is executed, this container is not needed.
COPY create-kafka-topics.sh create-kafka-topics.sh
ENTRYPOINT ["./create-kafka-topics.sh"]
create-kafka-topics.sh
#!/bin/bash
# Simply wait until original kafka container and zookeeper are started.
sleep 15.0s
# Parse string of kafka topics into an array
# https://stackoverflow.com/a/10586169/4587961
kafkatopicsArrayString="$KAFKA_TOPICS"
IFS=' ' read -r -a kafkaTopicsArray <<< "$kafkatopicsArrayString"
# A separate variable for zookeeper hosts.
zookeeperHostsValue=$ZOOKEEPER_HOSTS
# Create kafka topic for each topic item from split array of topics.
for newTopic in "${kafkaTopicsArray[@]}"; do
# https://kafka.apache.org/quickstart
kafka-topics --create --topic "$newTopic" --partitions 1 --replication-factor 1 --if-not-exists --zookeeper "$zookeeperHostsValue"
done
README.md - 以便其他人知道如何使用它。始终记录您的资料 - 很好的建议。
# Creates kafka topics automatically.
## Parameters
`ZOOKEEPER_HOSTS` - zookeeper hosts, I used value `"zookeeper:32181"` to run it locally.
`KAFKA_TOPICS` - space separated list of kafka topics. Example, `topic_1, topic_2, topic_3`.
Note, this container should run only **after** your original kafka broker and zookeeper are running.
After this container creates topics, it is not needed anymore.
如何检查主题是否已创建。
一种解决方案是检查kafka-topics-creator容器的日志。
docker logs kafka-topics-creator 应该打印
$ docker logs kafka-topics-creator
WARNING: Due to limitations in metric names, topics with a period ('.') or underscore ('_') could collide. To avoid issues it is best to use either, but not both.
Created topic "topic_v1".
WARNING: Due to limitations in metric names, topics with a period ('.') or underscore ('_') could collide. To avoid issues it is best to use either, but not both.
Created topic "topic_v2".