spring-boot-hello-world

This is a very simple Spring Boot Application which works well for testing CI solutions. The application can be deployed into a Docker image which can then be run just as a container or apart of a Kubernetes cluster. For an example of how this project can be implemented into a simple pipeline, see the spring-boot-hello-world-ci project.

• It will be useful to first have Docker Hub Account so that your images can be accessible on the internet
• You will need to install Docker

Installing Docker (if you need to)

On Linux you can run these commands, log out and back in.

curl https://get.docker.com | sudo bash
sudo usermod -aG docker $(whoami)
exit

Docker Hub Website and follow the install steps, Docker Compose will be installed this way as well - (Windows) (Mac)

Building the Docker Image

We can build the Docker image using this command replacing bobcrutchley with whatever your Docker Hub username is:

docker build -t bobcrutchley/spring-boot-hello-world:latest

Pushing Your Image to Docker Hub

Pushing your new Image to Docker Hub will make it accessible from anywhere:

docker login
docker push bobcrutchley/spring-boot-hello-world:latest

Running with Docker

The image can also be run locally:

docker run -d -p 8080:8080 --name spring-boot-hello-world --rm bobcrutchley/spring-boot-hello-world:latest

Running with Kubernetes (Google Cloud Platform)

You will need to have the following to be able to these commands:

• A free trial or subscription to Google Cloud Platform

• Have the GCloud SDK installed

• Have the Kubernetes Engine API enabled (Requires GCloud SDK to be installed)

   gcloud services enable containers.googleapis.com

• Make sure that you are logged in to the GCloud SDK

  gcloud auth login

• Install the kubectl component, this will allow us to communicate with the Kubernetes cluster

  gcloud components install kubectl

• Create a new cluster

  gcloud container clusters create spring-boot-hello-world

• The Deployment and Service for the application can be made by running this command from the project root:

  kubectl create -f kubernetes