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IMPORTANT NOTE

This repository is always automatically generated from the CAS Initializr. Do NOT submit pull requests here as the change-set will be overwritten on the next sync. To learn more, please visit the CAS documentation.

Apereo CAS WAR Overlay Template

WAR Overlay Type: cas-config-server-overlay

Versions

  • CAS Server 7.2.0-RC2
  • JDK 21

Build

To build the project, use:

# Use --refresh-dependencies to force-update SNAPSHOT versions
./gradlew[.bat] clean build

To see what commands/tasks are available to the build script, run:

./gradlew[.bat] tasks

If you need to, on Linux/Unix systems, you can delete all the existing artifacts (artifacts and metadata) Gradle has downloaded using:

# Only do this when absolutely necessary
rm -rf $HOME/.gradle/caches/

Same strategy applies to Windows too, provided you switch $HOME to its equivalent in the above command.

Keystore

For the server to run successfully, you might need to create a keystore file. This can either be done using the JDK's keytool utility or via the following command:

./gradlew[.bat] createKeystore

Use the password changeit for both the keystore and the key/certificate entries. Ensure the keystore is loaded up with keys and certificates of the server.

Extension Modules

Extension modules may be specified under the dependencies block of the Gradle build script:

dependencies {
    implementation "org.apereo.cas:cas-server-some-module"
    ...
}

To collect the list of all project modules and dependencies in the overlay:

./gradlew[.bat] dependencies

Deployment

On a successful deployment via the following methods, the server will be available at:

  • https:/localhost:8888/casconfigserver

Executable WAR

Run the server web application as an executable WAR. Note that running an executable WAR requires CAS to use an embedded container such as Apache Tomcat, Jetty, etc.

No servlet container is specified for the current build. Examine your gradle.properties file and modify the appServer property to point to the appropriate container of choice.

java -jar build/libs/casconfigserver.war

Or via:

./gradlew[.bat] run

It is often an advantage to explode the generated web application and run it in unpacked mode. One way to run an unpacked archive is by starting the appropriate launcher, as follows:

jar -xf build/libs/casconfigserver.war
cd build/libs
java org.springframework.boot.loader.launch.JarLauncher

This is slightly faster on startup (depending on the size of the WAR file) than running from an unexploded archive. After startup, you should not expect any differences.

Debug the CAS web application as an executable WAR:

./gradlew[.bat] debug

Or via:

java -Xdebug -Xrunjdwp:transport=dt_socket,address=5000,server=y,suspend=y -jar build/libs/casconfigserver.war

Run the CAS web application as a standalone executable WAR:

./gradlew[.bat] clean executable

CDS Support

CDS is a JVM feature that can help reduce the startup time and memory footprint of Java applications. CAS via Spring Boot now has support for easy creation of a CDS friendly layout. This layout can be created by extracting the CAS web application file with the help of the tools jarmode:

# Note:
# You must first build the web application with "executable" turned off
java -Djarmode=tools -jar build/libs/casconfigserver.war extract

# Perform a training run once
java -XX:ArchiveClassesAtExit=cas.jsa -Dspring.context.exit=onRefresh -jar casconfigserver/casconfigserver.war

# Run the CAS web application via CDS
java XX:SharedArchiveFile=cas.jsa -jar casconfigserver/casconfigserver.war

External

Deploy the binary web application file in build/libs after a successful build to a servlet container of choice.

Docker

The following strategies outline how to build and deploy CAS Docker images.

Jib

The overlay embraces the Jib Gradle Plugin to provide easy-to-use out-of-the-box tooling for building CAS docker images. Jib is an open-source Java containerizer from Google that lets Java developers build containers using the tools they know. It is a container image builder that handles all the steps of packaging your application into a container image. It does not require you to write a Dockerfile or have Docker installed, and it is directly integrated into the overlay.

# Running this task requires that you have Docker installed and running.
./gradlew build jibDockerBuild

Dockerfile

You can also use the Docker tooling and the provided Dockerfile to build and run. There are dedicated Gradle tasks available to build and push Docker images using the supplied DockerFile:

./gradlew build casBuildDockerImage

Once ready, you may also push the images:

./gradlew casPushDockerImage

If credentials (username+password) are required for pull and push operations, they may be specified using system properties via -DdockerUsername=... and -DdockerPassword=....

A docker-compose.yml is also provided to orchestrate the build:

docker-compose build

Spring Boot

You can use the Spring Boot build plugin for Gradle to create CAS container images. The plugins create an OCI image (the same format as one created by docker build) by using Cloud Native Buildpacks. You do not need a Dockerfile, but you do need a Docker daemon, either locally (which is what you use when you build with docker) or remotely through the DOCKER_HOST environment variable. The default builder is optimized for Spring Boot applications such as CAS, and the image is layered efficiently.

./gradlew bootBuildImage

The first build might take a long time because it has to download some container images and the JDK, but subsequent builds should be fast.