tictactoe

Test project to create a game of tic tac toe, while also learning how to use kubernetes and docker.

• Tools Required
• Set up docker environment on windows
• Start Minikube
• Create a docker image for the tictactoe application
• Deploy postgres
• Deploy application

Tools Required:

1. Java with Spring boot

2. Docker toolbox

3. Minikube

4. Postgresql DB

5. Postman

6. HTML

Set up docker environment on windows

1. Download Docker ToolBox and install.

    https://docs.docker.com/toolbox/toolbox_install_windows/

2. Download and Install kubernetes and minikube.

    https://kubernetes.io/docs/tasks/tools/install-minikube/

Start Minikube

1. Start minikube using command

    start minikube

2. Configure shell to use docker commands

    @FOR /f "tokens=*" %i IN ('minikube docker-env') DO @%i

Create a docker image for the tictactoe application

1. Create a dockerfile.

2. From the root directory of the project (The one with pom.xml), build the code.

    mvn clean install

3. Build the docker image specifying the tag and version.

    docker build -t tictactoe:latest

Deploy postgres

1. Pull postgres image and deploy.

    kubectl run postgres --image=postgres:latest --env="POSTGRES_PASSWORD=postgres" --image-pull-policy=IfNotPresent

2. Expose postgres deployment on desired port.

    kubectl expose --port=5432 deployment postgres --type=NodePort 

3. (Optional) Check if service is running and get postgres service url.

    minikube service postgres --url

Deploy application

1. Deploy the application, set the port to match tomcat port as configured in the application.

    kubectl run tictactoe --image=tictactoe:latest --port=8087 --image-pull-policy=IfNotPresent 

2. Expose the application deployment.

    kubectl expose deployment tictactoe --type=NodePort

3. Get the application's service URL.

    minikube service tictactoe --url

Now the containers can be accessed by using docker ip in browser