CAS 5.0.x Integration w/ Apache ZooKeeper


Contributed Content
Giovanni Morelli (Email: giannimorell at gmail.com, Github: @GiovanniMorelli) was kind enough to share this guide.

I have created a cas-server-core-configuration-cloud-zookeeper module for CAS 5.0.4 based on cas-server-core-configuration-cloud-mongo When CAS is started, it reads all properties under zookeeper’s path: /cas/config/cas without the need to configure cas.properties.

The project source code is available here.

Configuration

  • Add parameter cas.spring.cloud.zookeeper.uri=localhost:2181 in bootstrap.properties
  • Add configurations on Zookeeper. Example: cas.server.name: https://localhost:9327
  • Start CAS.

Build

Download the codebase for CAS 5.0.4 first and add the project source code into the core directory.

Make the following changes:

  • settings.gradle (Root project)
    • Add include "core:cas-server-core-configuration-cloud-zookeeper"
  • gradle.properties (Root project)
    • Update version zookeeper : zookeeperVersion=3.4.10
    • Add springCloudZookeeperVersion=1.0.4.RELEASE
  • build.gradle (into project cas-server-core-configuration-cloud-zookeeper)
description = "Apereo CAS Core Configuration - Zookeeper"

dependencies {
  compile libraries.springboot
  compile libraries.spring
  compile libraries.springcloud
  compile libraries.zookeeper
}

Classes used in the ZooKeeper project:

/cas-server-core-configuration-cloud-zookeeper/src/main/java/org/apereo/cas/ZookeeperPropertySource.java
/cas-server-core-configuration-cloud-zookeeper/src/main/java/org/apereo/cas/ZookeeperPropertySourceLocator.java
/cas-server-core-configuration-cloud-zookeeper/src/main/java/org/apereo/cas/config/ZookeeperCloudConfigBootstrapConfiguration.java

Build the codebase with gradlew clean build --parallel -x test -x javadoc -x check.

Overlay

Add this configuration in pom.xml:

<dependency>
    <groupId>org.apereo.cas</groupId>
    <artifactId>cas-server-core-configuration-cloud-zookeeper</artifactId>
    <version>${cas.version}</version>
</dependency>

TODO

  • When you add a new configuration to Zookeeper, reload the configuration property automatically in CAS.

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