TLS support #185
Description
It would be great to add TLS support to test-container, as we could use it with testing our test-clients repository. In the future, we can potentially integrate it into more of our repos (e.g., metrics-reporter). I think the approach could use openssl as we do it within strimzi-kafka-operator with a few Java APIs (e.g., CertificateFactory, KeyStore ...). It should also use just self-signed certificates, which should be enough for testing purposes.
exposing API should be clear, i.e.,:
StrimziKafkaCluster cluster = new StrimziKafkaCluster.StrimziKafkaClusterBuilder()
.withTls()
.build();and with other auxiliary methods such as isTlsEnabled, getTrustStoreBytes and getTrustStorePassword.
TLS should be applied only on the external listener, i.e., communication between broker <---> client. The CONTROLLER listener should remain operational in plain communication.
And also, an option to provide custom certificates if needed, instead of auto-generated ones.