Dockerized Spring Boot Application

This was a very simple Spring Boot application that is containerizered with Docker. I built this to understand the underlying technology from the ground up.

Table of Contents

• Introduction
• Prerequisites
• Project Structure
• Getting Started
  • Clone the Repository
  • Build the Project
  • Run the Application Locally
  • Build and Run the Docker Container
• Accessing the Application
• Docker Commands
• License

Introduction

This is a simple Spring Boot application that has been containerized using Docker. The application consists of a single REST endpoint that returns "Hello, Docker!" when accessed.

Prerequisites

Before you begin, ensure you have the following installed on your machine:

• Java Development Kit (JDK) 11
• Maven
• Docker

Project Structure

DockerDemo

├── src
│   ├── main
│   │   ├── java
│   │   │   └── com
│   │   │       └── example
│   │   │           └── demo
│   │   │               ├── DemoApplication.java
│   │   │               └── HelloController.java
├── target
├── Dockerfile
└── pom.xml

Getting Started

Clone the Repository

git clone https://github.com/taaare/docker-demo.git cd docker-demo

Run the Application Locally

Run the JAR file directly to verify it works:

java -jar target/docker-demo-0.0.1-SNAPSHOT.jar You should see the application start and be accessible at http://localhost:8080.

Build and Run the Docker Container

Build the Docker Image

docker build -t my-java-app . Run the Docker Container

docker run -p 8080:8080 my-java-app

Accessing the Application

Once the Docker container is running, open your web browser and navigate to:

http://localhost:8080

You should see the message "Hello, Docker!".

Docker Commands

Here are some useful Docker commands for managing your containers:

List Running Containers

docker ps Stop a Running Container

docker stop <container_id_or_name> Remove a Stopped Container

docker rm <container_id_or_name> View Container Logs

docker logs <container_id_or_name> Remove the Docker Image

docker rmi my-java-app

License

This project is licensed under the MIT License. See the LICENSE file for details.