[英]Connect to Kafka on host from Docker (ksqlDB)
I'm running ksqldb-server from a docker-compor found here https://ksqldb.io/quickstart.html#quickstart-content我正在从此处找到的 docker-compor 运行 ksqldb-server https://ksqldb.io/quickstart.html#quickstart-content
My kafka bootstrap server is running on the same VM in standard alone mode.我的 kafka 引导服务器以标准单独模式在同一台 VM 上运行。 I can see the messages in one topic with a console consumer:我可以通过控制台使用者查看一个主题中的消息:
sudo kafka-avro-console-consumer --from-beginning --bootstrap-server localhost:9092 --topic source-air-input --property print.key=true --max-messages 2
Unfortunatly running ksql from docker gives me this error.不幸的是,从 docker 运行 ksql 会给我这个错误。
ksqldb-server | [2021-07-15 23:12:58,772] ERROR Failed to start KSQL (io.confluent.ksql.rest.server.KsqlServerMain:66)
ksqldb-server | java.lang.RuntimeException: Failed to get Kafka cluster information
ksqldb-server | at io.confluent.ksql.services.KafkaClusterUtil.getKafkaClusterId(KafkaClusterUtil.java:107)
ksqldb-server | at io.confluent.ksql.rest.server.KsqlRestApplication.buildApplication(KsqlRestApplication.java:624)
ksqldb-server | at io.confluent.ksql.rest.server.KsqlServerMain.createExecutable(KsqlServerMain.java:152)
ksqldb-server | at io.confluent.ksql.rest.server.KsqlServerMain.main(KsqlServerMain.java:59)
ksqldb-server | Caused by: java.util.concurrent.TimeoutException
ksqldb-server | at org.apache.kafka.common.internals.KafkaFutureImpl$SingleWaiter.await(KafkaFutureImpl.java:108)
ksqldb-server | at org.apache.kafka.common.internals.KafkaFutureImpl.get(KafkaFutureImpl.java:272)
ksqldb-server | at io.confluent.ksql.services.KafkaClusterUtil.getKafkaClusterId(KafkaClusterUtil.java:105)
My docker-compose.yml is the following.我的 docker-compose.yml 如下。
---
version: '3.9'
services:
ksqldb-server:
image: confluentinc/ksqldb-server:0.18.0
hostname: ksqldb-server
container_name: ksqldb-server
extra_hosts:
- "host.docker.internal:host-gateway"
ports:
- "8088:8088"
environment:
KSQL_LISTENERS: http://0.0.0.0:8088
KSQL_BOOTSTRAP_SERVERS: host.docker.internal:9092
KSQL_KSQL_LOGGING_PROCESSING_STREAM_AUTO_CREATE: "true"
KSQL_KSQL_LOGGING_PROCESSING_TOPIC_AUTO_CREATE: "true"
ksqldb-cli:
image: confluentinc/ksqldb-cli:0.18.0
container_name: ksqldb-cli
depends_on:
- ksqldb-server
entrypoint: /bin/sh
tty: true
I tried many possible configurations for the address without success.我为该地址尝试了许多可能的配置,但均未成功。 What might be wrong?可能有什么问题? I tried the suggestions from this question From inside of a Docker container, how do I connect to the localhost of the machine?我尝试了这个问题的建议从Docker 容器内部,如何连接到机器的本地主机? without success.没有成功。
Modify Kafka's server.properties
修改Kafka的server.properties
listeners=PLAINTEXT_DOCKER://:29092,PLAINTEXT_LOCAL://localhost:9092
advertised.listeners=PLAINTEXT_DOCKER://host.docker.internal:29092,PLAINTEXT_LOCAL://localhost:9092
listener.security.protocol.map=PLAINTEXT_DOCKER:PLAINTEXT,PLAINTEXT_LOCAL:PLAINTEXT
inter.broker.listener.name=PLAINTEXT_LOCAL
Update your Compose like so to point at the host rather than itself像这样更新你的 Compose 以指向主机而不是它本身
version: '3.9'
services:
ksqldb-server:
image: confluentinc/ksqldb-server:0.18.0
hostname: ksqldb-server
container_name: ksqldb-server
ports:
- "8088:8088"
extra_hosts:
- "host.docker.internal:host-gateway"
environment:
KSQL_BOOTSTRAP_SERVERS: host.docker.internal:29092
...
(Tested on Mac), Getting /info
endpoint of KSQL (在 Mac 上测试),获取 KSQL 的/info
端点
http :8088/info
HTTP/1.1 200 OK
content-length: 133
content-type: application/json
{
"KsqlServerInfo": {
"kafkaClusterId": "ZH2-h1W_SaivCW0qa8DQGA",
"ksqlServiceId": "default_",
"serverStatus": "RUNNING",
"version": "0.18.0"
}
}
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