Set up Trino SSL

SSL Requirement

• If any authentication (Kerberos, LDAP) is enabled for Trino, SSL must also be enabled.
• In Ambari, when Kerberos is enabled, the 'Enable SSL' option is automatically selected. Disabling SSL while using authentication will cause Trino services to fail at startup.
• The SSL certificate must have a valid SubjectAlternativeName (SAN). The SSL certificates without a SAN are not supported.

SSL Setup

• Must use either a passwordless .pem file or a .jks keystore with a password on all the trino nodes, readable by trino user.
• Configure SSL Keystore Path=<path to pem/keystore location>, this path must be the same for each Trino server as shown below.

• A Shared Key must be configured when SSL is enabled. You can generate it using below command.

openssl rand 64 | base64

Enter the generated key in the 'Shared Key' configuration field during Trino setup under Advanced trino-env.

Internal Node-to-Node SSL (Optional)

The internode SSL communication between the Coordinator and Worker nodes, can be enabled as per below steps, however there is a performance degradation and it is not recommended.

Requirement: All certificates must be imported into the JDK 23 cacerts truststore on each node.

The example command is as follows.

sudo keytool -importcert \

  -trustcacerts \

  -keystore /tmp/jdk-23/lib/security/cacerts \

  -storepass changeit \

  -alias trino-worker \

  -file /etc/trino/worker.crt \

  -noprompt

Kerberos Configuration

The kerberos properties are all auto configured in the Coordinator node’s config.properties.

The following properties are added in config.properties once security is identified as Kerberos.

http-server.authentication.type=KERBEROS

web-ui.authentication.type=KERBEROS

#http-server.authentication.krb5.service-name={{kerberos_service_name}}

## This line if you plan to use it through a HTTP connection and UI access via Knox

http-server.authentication.krb5.service-name=HTTP

http-server.authentication.krb5.principal-hostname={{hostname}}

http-server.authentication.krb5.keytab={{keytab}}

http.authentication.krb5.config=/etc/krb5.conf

LDAP Configuration

To configure or enable LDAP, the following two properties need to be configured under Advanced trino-ldap:

• LDAP URL
• LDAP User Bind Pattern String