第 6 章 Securing access to Kafka

Encryption and authentication in Kafka brokers is configured per listener. For more information about Kafka listener configuration, see 第 5.4.2 节 “Listeners”.

Each listener in the Kafka broker is configured with its own security protocol. The configuration property listener.security.protocol.map defines which listener uses which security protocol. It maps each listener name to its security protocol. Supported security protocols are:

Given the following listeners configuration:

listeners=INT1://:9092,INT2://:9093,REPLICATION://:9094

the listener.security.protocol.map might look like this:

listener.security.protocol.map=INT1:SASL_PLAINTEXT,INT2:SASL_SSL,REPLICATION:SSL

This would configure the listener INT1 to use unencrypted connections with SASL authentication, the listener INT2 to use encrypted connections with SASL authentication and the REPLICATION interface to use TLS encryption (possibly with TLS client authentication). The same security protocol can be used multiple times. The following example is also a valid configuration:

listener.security.protocol.map=INT1:SSL,INT2:SSL,REPLICATION:SSL

Such a configuration would use TLS encryption and TLS authentication (optional) for all interfaces.