Uwe Eisele created KAFKA-13003:
----------------------------------
Summary: KafkaBroker advertises socket port instead of the
configured advertised port
Key: KAFKA-13003
URL: https://issues.apache.org/jira/browse/KAFKA-13003
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 2.8.0
Reporter: Uwe Eisele
Assignee: Uwe Eisele
In Kraft mode Apache Kafka 2.8.0 does advertise the socket port instead of the
configured advertised port.
A broker given with the following configuration
{code:java}
listeners=PUBLIC://0.0.0.0:19092,REPLICATION://0.0.0.0:9091
advertised.listeners=PUBLIC://envoy-kafka-broker:9091,REPLICATION://kafka-broker1:9091
{code}
advertises on the _PUBLIC_ listener _envoy-kafka-broker:19092_, however I would
expect that _envoy-kafka-broker:9091_ is advertised. In ZooKeeper mode it works
as expected.
In a deployment with a L4 proxy in front of the Kafka cluster, it is important,
that the advertised port can be different from the actual socket port.
I tested it with a Docker-Compose setup which runs 3 Kafka Broker in Kraft mode
and an Envoy proxy in front of them. With Apache Kafka 2.8.0 it does not work,
because Kafka does not advertise the configured advertised port. For more
details see:
https://github.com/ueisele/kafka/tree/fix/kraft-advertisedlisteners-build/proxy-examples/proxyl4-kafkakraft-bug-2.8
_Client -- 909[1-3] --> Envoy Proxy -- 19092 --> Kafka Broker [1-3]_
|| Envoy Host || Envoy Port || Kafka Broker || Kafka Port || Advertised
Listener ||
| envoy-kafka-broker | 9091 | kafka-broker1 | 19092 | envoy-kafka-broker:9091 |
| envoy-kafka-broker | 9092 | kafka-broker2 | 19092 | envoy-kafka-broker:9092 |
| envoy-kafka-broker | 9093 | kafka-broker3 | 19092 | envoy-kafka-broker:9093 |
{code:bash}
> docker-compose exec kafkacat kafkacat -b envoy-kafka-broker:9091 -L
Metadata for all topics (from broker -1: envoy-kafka-broker:9091/bootstrap):
3 brokers:
broker 101 at envoy-kafka-broker:19092
broker 102 at envoy-kafka-broker:19092 (controller)
broker 103 at envoy-kafka-broker:19092
0 topics:
{code}
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
