쿠버네티스로 노드 애플리케이션을 간단히 돌려보는게 목표!

Minikube provides a simple way of running Kubernetes on your local machine for free

Minikube 설치

curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-darwin-amd64&&
\ chmod +x minikube&&
\ sudo mv minikube /usr/local/bin/

xhyve driver 설치

brew install docker-machine-driver-xhyve

퍼미션 설정

sudo chown root:wheel $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve
sudo chmod u+s $(brew --prefix)/opt/docker-machine-driver-xhyve/bin/docker-machine-driver-xhyve

kubernetes clusters와 통신 위한 kubectl 설치

brew install kubectl

minikube cluster 시작

minikube start --vm-driver=xhyve

minikube 컨텍스트 셋팅

kubectl config use-context minikube

kubectl로 통신 되는지 확인

kubectl cluster-info

노드 코딩

var http = require('http');

var handleRequest = function(request, response) {
  console.log('Received request for URL: ' + request.url);
  response.writeHead(200);
  response.end('Hello World!');
};
var www = http.createServer(handleRequest);
www.listen(8080);

도커 컨테이너 이미지 생성

Dockerfile 생성

FROM node:6.9.2
EXPOSE 8080
COPY server.js .
CMD node server.js

??

eval $(minikube docker-env)

도커 이미지 빌드

docker build -t hello-node:v1 .

pod run

kubectl run hello-node --image=hello-node:v1 --port=8080

배포 확인

kubectl get deployments

NAME         DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
hello-node   1         1         1            1           3m

pod 확인

kubectl get pods

NAME                         READY     STATUS    RESTARTS   AGE
hello-node-714049816-ztzrb   1/1       Running   0          6m

이벤트 확인

kubectl get events

서비스 생성

kubectl expose deployment hello-node --type=LoadBalancer
minikube service hello-node

https://kubernetes.io/docs/tutorials/stateless-application/hello-minikube