Spring Boot Hello World for OpenShift

A simple Spring Boot application with a hello world endpoint, built with Maven and JDK 17, designed for deployment to OpenShift using Source-to-Image (S2I).

Prerequisites

• JDK 17
• Maven 3.8+
• OpenShift CLI (oc)

Building the Application

To build the application locally:

mvn clean package

Running Locally

To run the application locally:

mvn spring-boot:run

The application will be available at http://localhost:8080

Deploying to OpenShift using S2I

1. Log in to your OpenShift cluster:

oc login <your-openshift-url>

2. Create a new project or use an existing one:

oc new-project hello-openshift

3. Create a new application using S2I:

oc new-app --name=hello-openshift java:17~https://your-git-repo-url --context-dir=/ --strategy=source

4. Expose the service to create a route:

oc expose svc/hello-openshift

5. Get the route URL:

oc get route hello-openshift

Visit the URL to see your application running on OpenShift.