Unable to use selfmade Callbackhandler Classes

[fubezz]

I am running Kafka in a Kubernetes environment. I have implemented sasl callbackhandler for Kafka to login and verify users via Keycloak. Sadly I can't add the login handler to the ksm container, since there is no way to add the kafka property "sasl.login.callback.handler.class". Moreover I would have to extend the java classpath to add my jar file containing the callbackhandlers, which is also not possible at the moment, as far as I know. To enable these features would be awesome!

[simplesteph]

1. you can definitely add the sasl.login.callback.handler.class to the properties file. Just modify that file and literally add that setting. If you think it should be accessible by everyone, please do a PR
2. you could use the Zookeeper configs instead and bypass that mechanism altogether
3. you can definitely add classes to the classpath. Just make sure to add your jar to wherever the docker image picks the jars from.