Containerized Springboot on Tomcat native (with support for HTTP/2)

A proof-of-concept to run Springboot applications Debian based container with support for:

• Tomcat native with APR over SSL
• HTTP/2

Build tomcat-native/Gradle image

Dockerfile is based on Tomcat's Dockerfile with the following modifications:

• Changed TOMCAT_MAJOR and TOMCAT_VERSION to match Springboot tomcat container version
• Changed URL for Tomcat gpg keys
• Added Gradle-3.3 SDK
• Removed clean-up of JDK for the convinience of building and running inside container (gradle bootRun)

To build, run ./build.sh. Run build.sh -h to see available options. It generates an image <REGISTRY_URL>/tomcatnative-gradle. Image will be tagged with a version pulled from gradle project

example: ./build.sh -r docker.io -p

  -v|--version Version number of the image. e.g: 1.0.0
  -r|--registry Docker registry URL.
  -p|--publish (Optional) Publish the image to the supplied docker registry.
  --release (Optional) Release tag.
  --latest (Optional) Move the latest tag.

NOTE: Building the image will not package springboot-http2 project inside it. Refer Usage section for how to run the project.

Usage

Run with gradle bootRun

build.gradle has bootRun task defined with all required params including ALPN library required to have http/2 working on JDK-8. Run the following from sprintboot-http2 project directory:
docker run -d -p 8849:8849 -p 9900:9900 -p 9910:9910 -p 9920:9920 -v /${HOME}/.gradle:/gradle-cache -v ${PWD}:/springboot-http2 --name springboot-http2 <REGISTRY_URL>/tomcatnative-gradle bash -c "cd /springboot-http2 && gradle bootRun"

* 8849 --> JMX port for profiling (optional)
* 9900 --> http/2 port (h2 with SSL)
* 9910 --> NIO connector with SSL
* 9920 --> APR connector with SSL

Run as executable jar

1. Run gradle bootRepackage. This will generate a jar build/libs/http2-poc-0.0.1-SNAPSHOT.jar
2. Docker run with bash.
3. Run with alpn jar in classpath as shown in start.sh from inside the container.