Important

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Docker Security

Confluent Platform supports cluster encryption and authentication, including a mix of authenticated and unauthenticated, and encrypted and non-encrypted clients. Using security is optional. These security features are supported on the Confluent Platform Docker images:

Component	Tests
Confluent Control Center	HTTPS
Kafka Connect	None
Kafka	SASL, SSL
REST Proxy	HTTPS
Schema Registry	HTTPS
ZooKeeper	SASL

Managing secrets

When you enable security for the Confluent Platform, you must pass secrets (e.g., credentials, certificates, keytabs, Kerberos config etc.) to the container. The images handle this by expecting the credentials to be available in the secrets directory. The containers specify a Docker volume for secrets and expect the admin to map it to a directory on the host which contains the required secrets.

Running containers with arbitrary user IDs

The images can be run with arbitrary user IDs. If there is a container engine vulnerability, arbitrary user IDs can prevent processes from escaping the container and gaining escalated permissions on the host node.

For details on the available security features in Confluent Platform, see the Confluent Platform Security Overview Documentation.

For tutorials on using SSL in the Confluent Platform, see Kafka Event Streaming Application.