Simple java web application.
$ brew update && brew install kustomize jq
Build the image:
$ docker build --tag=webapp .
Running the container:
$ docker run -p 8080:8080 webapp
The application expose the port 8080 and you check running by:
It also provides a health check endpoint:
http://localhost:8080/actuator/health
In order to deploy our application to Kubernetes we have first build and push the image to AWS ECR:
Let's create a local env that it would be used to PUSH the image:
$ WEBAPP_REPO=$(aws ecr describe-repositories --repository-names webapp | jq -r '.repositories[0].repositoryUri')
After building the image we can tag and push it
$ docker tag java-helloworld:latest $WEBAPP_REPO
$ docker push $WEBAPP_REPO
This project it's using Kustomize to handle the Kubernetes configurations files, that an excellent tool to handle multiple configuration per environments, although, it's not this case we are going to use it anyway.
- k8s/: All files related to the application and deployment of Kuberenetes
Go to the kubernetes folder:
$ cd k8s/
In order to deploy our web application to Kubernetes make sure you have pushed the image to the Docker repository and defined the $WEBAPP_REPO var above.
Now we can finally run the kuztomize buid that it will generate all resources to be create on Kubernetes.
obs. The sed command it's updating the final output with the repository url from out env $WEBAPP_REPO
$ kustomize build | sed -e 's,WEBAPP_REPO,'$WEBAPP_REPO',g' | kubectl apply -f -
You now have the PODS running you can check running:
$ kubectl get pods -n dev