clintonmedbery/node-kubernetes-app

Basic node application with the ability to deploy on kubernetes.

Running the Node app

Install the app using:

npm install

Run the app using:

npm run start

Connect by going to:

http://localhost:3000/

Creating a Docker image to deploy

Build the image

docker build -t clintomed/hello-kubernetes:0.1.0 .

Run an image

docker run -p 3000:3000 -d hello-kubernetes

Push the image

docker push clintomed/hello-kubernetes:0.1.0

Deploying to Kubernetes using vanilla Kubernetes

For these instructions I used kind. Make sure you have pushed the Docker image.

1. kind create cluster
2. Go into kubernetes-yaml/deployments/hello-kubernetes.deployment.yaml and change the spec.template.spec to use the image you pushed to Docker Hub.
3. Run k apply -f kubernetes-yaml/deployments/hello-kubernetes.deployment.yaml
4. Run k apply -f kubernetes-yaml/services/service-definition.yaml
5. Run kubectl port-forward service/myapp-service 3003:3000 to expose port 3000 on your node to port 3003 on your host.
6. Go to http://localhost:3003/

Deploying to Kubernetes using Helm

Setting up helm release

1. Create a new folder called helm
2. Initialize helm using helm create node-kubernetes
3. In the deployment.yaml file in the templates folder, change the containerPort to 3000.
4. In the Chart.yaml change the the appVersion to the version of the docker container you want to deploy, for example 0.1.0.
5. In the values.yaml file, change the image.repository to clintomed/hello-kubernetes. Change service.type to NodePort and service.port to 3000. Change ingress.enabled to true.

How to make a Helm chart in 10 minutes

Deploying the new helm release