kafka-ldap-integration

Enhancing kafka 2.x with

• customized SimpleLDAPAuthentication using LDAPS simple bind for authentication
• customized SimpleACLAuthorizer using LDAPS compare-matched for group membership verification

Thus, moving authentication from user and passwords in JAAS context file on kafka brokers to LDAP server

By defining Read/Write allowance with LDAP groups, authorization is moved from Zookeeper Access Control Lists to group membership verification.

Binding and group membership information is cached (limited lifetime after write), giving minor performance penalty and reduced LDAPS traffic.

Tools

• Kotlin
• Gradle build tool
• Spek test framework

Components

1. Unboundid LDAP SDK for LDAPS interaction
2. Caffeine Cache
3. YAML Configuration for LDAP baseDN for users, groups and more. See src/test/resources/ldapconfig.yaml for details

N.B. that the directory hosting yaml configuration file must be in CLASSPATH.

Quickstart

A tutorial with configuration examples is available in the User Guide.

Build

./gradlew clean build shadowJar

Build without unit tests

./gradlew clean build shadowJar -x test

The result is build/libs/kafka-ldap-integration-<version>.jar, which contains the authentication and authorization classes, along with all of their dependencies.

N.B. This jar must be added to the classpath for the Kafka broker. The easist way to do that is to copy the jar into the directory $KAFKA_HOME/libs.

Contact us

Code/project related questions can be sent to

• Joe Schmetzer, joe.schmetzer@instaclustr.com
• Zeke Dean, zeke.dean@instaclustr.com

Credit to original authors

Maintainers of the GitHub project kafka-plain-saslserver-2-ad:

• Torstein Nesby, torstein.nesby@nav.no
• Trong Huu Nguyen, trong.huu.nguyen@nav.no