Env Viewer

This is a simple Spring Boot application that displays the environment variables it is running with. It serves as a basic example of a containerized Java application with Kubernetes and Helm configurations.

Features

• Exposes a single REST endpoint / that returns a JSON object containing all environment variables.
• Built with Java 21 and Spring Boot 3.2.0.
• Containerized using Jib.
• Includes Kubernetes deployment, service, and configmap configurations.
• Includes a Helm chart for easy deployment to Kubernetes.

Prerequisites

• Java 21
• Gradle 8.x

Building the Project

To build the project, run the following command:

./gradlew build

Running the Project Locally

To run the application locally, use the following command:

./gradlew bootRun

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

Containerization

To build the container image using Jib, run the following command:

./gradlew jib

This will build the image and push it to the configured registry in build.gradle.

Deployment

Kubernetes

The project can be deployed to Kubernetes using the provided YAML files:

kubectl apply -f configmap.yaml
kubectl apply -f deployment.yaml
kubectl apply -f service.yaml

Helm

The project can also be deployed using the provided Helm chart:

helm install env-viewer ./env-viewer