Forcing PLAINTEXT in SECURITY_PROTOCOL_MAP for created listener

I'm trying to create ConfluentKafkaContainer in which I need to have an additional listener. The problem is that I require this listener to use SASL_PLAINTEXT not the plaintext. I see that KafkaHelper pushes PLAINTEXT for this listener into the security protocol map, even if I manually defined it as SASL_PLAINTEXT. Is there a workaround for this, or is there an idea to have this working?

https://github.com/testcontainers/testcontainers-java/blob/6e104da1d6e8a4188451f556e9c7cb4ce8eb3164/modules/kafka/src/main/java/org/testcontainers/kafka/KafkaHelper.java#L81C11-L81C59

Network network = new Network();
var kafka = new ConfluentKafkaContainer(DockerImageName.parse("confluentinc/cp-kafka:7.6.0"))
                .withNetwork(network)
                .withNetworkAliases(HOST_ALIAS)
                .withExposedPorts(9092, 9093, 9095)
                .withEnv("KAFKA_INTER_BROKER_LISTENER_NAME", "BROKER")
                .withEnv("KAFKA_LISTENER_NAME_PLAINTEXT_SASL_ENABLED_MECHANISMS", "PLAIN")
                .withEnv("KAFKA_LISTENER_NAME_PLAINTEXT_PLAIN_SASL_JAAS_CONFIG", "org.apache.kafka.common.security.plain.PlainLoginModule required " +
                        "username=\"admin\" " +
                        "password=\"admin-secret\" " +
                        "user_admin=\"admin-secret\";")
                .withEnv("KAFKA_LISTENER_NAME_TC-0_PLAIN_SASL_JAAS_CONFIG", "org.apache.kafka.common.security.plain.PlainLoginModule required " +
                        "username=\"admin\" " +
                        "password=\"admin-secret\" " +
                        "user_admin=\"admin-secret\";")
                    .withEnv("KAFKA_SASL_ENABLED_MECHANISMS", "PLAIN")
                .withEnv("KAFKA_AUTO_CREATE_TOPICS_ENABLE", "true")
                .withEnv("KAFKA_SASL_MECHANISM_INTER_BROKER_PROTOCOL", "PLAIN")
                .withListener("kafka:9095")
                .withEnv("KAFKA_LISTENER_SECURITY_PROTOCOL_MAP", "BROKER:PLAINTEXT,PLAINTEXT:SASL_PLAINTEXT,CONTROLLER:PLAINTEXT,TC-0:SASL_PLAINTEXT");

リンク先の行にある KafkaHelper.java から始め、withListener("kafka:9095") の呼び出しを追跡してください。リスナーのセキュリティプロトコルマップがどのように組み立てられているかを、明示的に指定された KAFKA_LISTENER_SECURITY_PROTOCOL_MAP の値と比較してください。追加されたリスナーが PLAINTEXT を強制されるのではなく SASL_PLAINTEXT を維持でき、既存のリスナー設定も有効なままであれば完了です。