ammiiamm / hello-kube

Simple kubernetes example

hello-kube

Simple kubernetes example

Install (macOS)

# Install homebrew
/usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

# Install Kubernetes command-line tool
brew install kubectl

# Install Minikube
brew cask install minikube

# Install gcloud
brew cask install google-cloud-sdk

# Install virtualbox (optional)
brew cask install virtualbox

Start

# To start Kubernetes cluster
minikube start

# To run from image
kubectl run hello-minikube --image=gcr.io/google_containers/echoserver:1.4 --port=8080

# To list pod
kubectl get pod

# To expose service
kubectl expose deployment hello-minikube --type=NodePort

Test

# To see it running and serve
curl $(minikube service hello-minikube --url)

Stop

# Delete service
kubectl delete deployment hello-minikube

# Stop Kubernetes cluster
minikube stop

Reusing the Docker daemon

To use docker on the command line on your host mac/linux machine talking to the docker daemon inside the minikube VM:

# To use Docker via minikube
eval $(minikube docker-env)

# Then try some command
docker ps

Build

# Build builder
npm run build-builder

# Build image (optional)
npm run build-image

Create a container cluster

# Login
gcloud auth login

# Setup config.project_id in package.json
open package.json

# Build and push to hub, will export $PROJECT_NAME, $IMAGE from package.json
npm run hub

# Create cluster
gcloud container clusters create hello-cluster --num-nodes=3

# List cluster
gcloud compute instances list

Deploy

# Port
export PORT=3000

# Try local (optional)
docker run --rm -p 3000:$PORT $IMAGE

# Run
kubectl run hello-kube --image=$IMAGE --port $PORT

# See it run
kubectl get pods

# Expose your application to the Internet
kubectl expose deployment $PROJECT_NAME --type=LoadBalancer --port 80 --target-port $PORT

# See it expose
kubectl get service

Destroy

gcloud container clusters delete $PROJECT_NAME

# Delete service
kubectl delete service $PROJECT_NAME