Balaji Dama task

Here is a simple Helm chart with NodeJS application (Express based). I've created a Docker image for that task. Multi-stage Dockerfile is also supplied here.

Usage

Run application locally (without Docker) with npm

Here we initialize a node project:

npm init

Installing dependencies. Express server, cors and body-parser (for parsing request):

npm install --save express cors body-parser @rama41222/node-logger npm install --save-dev nodemon

Run our application:

npm run dev

Application is accessible at (paste it to browser)

localhost:8080/hello

Run application locally in Docker container

Build a Docker image:

docker build -t balaji/node-express:latest .

Run a Docker container:

docker run -P -d balaji/node-express:latest

Determine Docker container port:

docker inspect $(docker ps -a --no-trunc -q) | grep HostPort

E.g.:

"HostPort": "32769"

Paste to browser to access container REST endpoint:

0.0.0.0:<port_number_from_command_above>/hello

E.g.:

0.0.0.0:32769/hello

Deploy a Helm chart to Minikube Kubernetes cluster:

Start minikube:

minikube start --vm-driver=hyperkit

Deploy a Helm chart with app:

helm install balaji-app . -f values.yaml

Wait 15 sec, then test an application:

helm test balaji-app

Open minikube application URL in browser:

minikube service balaji-app

To list installed Helm charts:

helm list

To delete a Helm chart:

helm del balaji-app

Add /hello to the end - it's our application REST endpoint

BONUS POINTS: Deploy a Helm chart with Terraform

Init Terraform:

terraform init

Apply Terraform configurations:

terraform apply

To list Kubernetes pods of our application:

kubectl get po -n default

Enter: yes

To delete Helm chart with Terraform:

terraform destroy

Enter: yes

To spin down a minikube:

minikube delete

Architecture diagrams

Express Web Server:

Application Deployment to local Minikube Kubernetes cluster with Helm: