My docker-compose.yml is
version: "2.1"
services:
pg-master:
image: postgres-9.6:3
ports:
- "5432:5432"
environment:
- VIRTUAL_HOST=postgres.local
web:
build: .
links:
- pg-master:postgres.local
ports:
- "8080:8080"
zookeeper:
image: jplock/zookeeper:3.4.6
ports:
- "2181:2181"
kafka:
image: wurstmeister/kafka:1.0.0
ports:
- "9092:9092"
environment:
- KAFKA_ADVERTISED_HOST_NAME=localhost
- KAFKA_ADVERTISED_PORT=9092
- KAFKA_CREATE_TOPICS=TestTopic1:3:1
- KAFKA_ZOOKEEPER_CONNECT=zookeeper:2181
- KAFKA_BROKER_ID=999
volumes:
- /var/run/docker.sock:/var/run/docker.sock
In web docker container, the java kafka producer:
Properties props = new Properties();
props.put("bootstrap.servers", "localhost:9092");
props.put("acks", "all");
props.put("retries", 0);
props.put("batch.size", 16384);
props.put("linger.ms", 1);
props.put("buffer.memory", 33554432);
props.put("key.serializer", "org.apache.kafka.common.serialization.StringSerializer");
props.put("value.serializer", "org.apache.kafka.common.serialization.StringSerializer");
this.kafkaProducer = new KafkaProducer<String, String>(props);
But, I got [kafka-producer-network-thread | producer-2] WARN org.apache.kafka.clients.NetworkClient - [Producer clientId=producer-2] Connection to node -1 could not be established. Broker may not be available.
NO idea why. any suggestions welcomed. Thanks very much.
UPDATE
I can produce and consume messages by bin/kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic TestTopic1 --from-beginning and bin/kafka-console-producer.sh --broker-list localhost:9092 --topic TestTopic1 inside and outside kafka docker container.
what is localhost inside docker container?
UPDATE
Now, I changed the KAFKA_ADVERTISED_HOST_NAME and bootstrap.servers of Kafka Java producer config manually to the docker host ip (got by ifconfig).
Now, it is working. Now, I have no idea how to get docker host ip and set it in docker-compose files automatically by program or bash.
