OpenShift - Unable to connect Strimzi from KafkaJS

问题

I have Strimzi Kafka cluster set-up successfully on OpenShift. I can see the following services:

kafka-brokers
kafka-bootstrap
zookeeper-client
zookeeper-nodes

This is actually different from what is called out here; so, not sure, if this is a Strimzi installation issue. I followed installation steps from here.

I created a routes for kafka-bootstrap and kafka-brokers on port 9092 (non-TLS clients). In both cases, I get a ECONNREFUSED error when I provide the route value (e.g. my-cluster-myproject.192.168.99.100.nip.io:9092 in the example from kafkajs.

How do I get the kafkajs package connected to the Strimzi cluster?

回答1:

The Strimzi services that you are seeing are correct but in order to access the Kafka brokers, it's better using the bootstrap service which allows to specify only one "broker" in the bootstrap servers list of your client and it will select a broker to connect the first time and then getting metadata (it avoids to you to connect using the headless service where the pod IPs can change on restart). So saying that, if you need to access the brokers from outside of OpenShift you don't have to create a route for the bootstrap service manually but you have to configure external listeners (https://strimzi.io/docs/latest/#assembly-configuring-kafka-broker-listeners-deployment-configuration-kafka) with type route. As already mentioned above, the OpenShift routes work with TLS only for TCP connections. In order to provide your clients the right certificate tu use for TLS you can follow this part of the documentation: https://strimzi.io/docs/latest/#kafka_client_connections