5abeel / docker-k8s-helloworld

docker-k8s-helloworld

A 'Hello World' example of building containers and deploying in Docker runtime & k8s (minikube)

Pre-req:

• Docker
• Minikube

Build Docker Container

Build the Docker container and run it as 'hello-app'

docker build --tag hello .
docker run -d --name hello-app -p 5000:5000 hello

Confirm status with

docker images
docker ps

Test with browser or curl: localhost:5000

Build & Deploy on Minikube

1. Start Minikube

minikube start

2. Set Docker env

eval $(minikube docker-env)

3. Build image again

docker build --tag hello .

4. Enable ingress in minikube

Confirm that the ingress pod is running in 'kube-system' namespace.

minikube addons enable ingress
kubectl get pods -n kube-system

5. Run the deployment and create a service for nodeport 5000

kubectl run hello --image=hello:latest --image-pull-policy=Never --port=5000
kubectl expose deployment hello --type=NodePort --port=5000

6. Get IP address to reach the pod via minikube url

minikube service hello --url

Test with browser or curl: <ip:port> from the last command above