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Amazon EMR
Amazon EMR Release Guide

Enabling SSL/TLS for Internal Communication Between Nodes

With Amazon EMR version 5.6.0 and later, you can enable SSL/TLS secured communication between Presto nodes by using a security configuration to enable in-transit encryption. For more information, see Specifying Amazon EMR Encryption Options Using a Security Configuration. The default port for internal HTTPS is 8446. The port used for internal communication must be the same port used for HTTPS access to the Presto coordinator. The http-server.https.port=port_num parameter in the Presto config.properties file specifies the port.

When in-transit encryption is enabled, Amazon EMR does the following for Presto:

  • Distributes the artifacts you specify for in-transit encryption throughout the Presto cluster. For more information about encryption artifacts, see Providing Certificates for In-Transit Data Encryption.

  • Modifies the config.properties file for Presto as follows:

    • Sets http-server.http.enabled=false on core and task nodes, which disables HTTP in favor of HTTPS.

    • Sets http-server.https.*, internal-communication.https.*, and other values to enable HTTPS and specify implementation details, including LDAP parameters if you have enabled and configured LDAP.