microservice_nodejs's Introduction

microservice_nodejs

This is a template for a Node.js microservice on Kubernetes.

Checkout repository:

git clone https://github.com/sachsenhofer/microservice_nodejs.git

App

const express = require('express')
const app = express()

app.get('/', (req, res) => res.send('Hello World!'))

app.listen(8080, () => console.log('App listening on port 8080!'))

Dockerfile

FROM node:8.11.2-alpine

WORKDIR /usr/src/app

COPY package*.json ./

RUN npm install

COPY . .

EXPOSE 8080

CMD [ "npm", "start" ]

Usage

Build

Builds the Docker image.

Execute in terminal:

sudo docker build -t microservice-nodejs:latest .

Push

Pushes an image or a repository to the Google Container Registry.

A Google Cloud account is needed. Replace 'public-207110' with your own Project-ID.

Execute in terminal:

sudo docker tag microservice-nodejs:latest eu.gcr.io/public-207110/microservice-nodejs:latest
sudo docker push eu.gcr.io/public-207110/microservice-nodejs:latest

Pull

Pulls the image from the Google Container Registry.

Execute in terminal:

sudo docker pull eu.gcr.io/public-207110/microservice-nodejs:latest

Run

Runs the image on your local machine.

Execute in terminal:

sudo docker run -p 8080:8080 eu.gcr.io/public-207110/microservice-nodejs:latest

Deploy

Deploys the application to the Kubernetes cluster.

Execute in terminal:

kubectl create -f deploy/kubernetes

Check all ressources that have been created:

kubectl get deployments,pods,services -n microservice

NAME                      DESIRED   CURRENT   UP-TO-DATE   AVAILABLE   AGE
microservice-nodejs-dep   2         2         2            2           8m

NAME                                       READY     STATUS    RESTARTS   AGE
microservice-nodejs-dep-85bc599557-2g7fj   1/1       Running   0          8m
microservice-nodejs-dep-85bc599557-gzzdz   1/1       Running   0          8m

NAME                      TYPE           CLUSTER-IP      EXTERNAL-IP     PORT(S)          AGE
microservice-nodejs-svc   LoadBalancer   10.63.253.93    35.233.81.3     8080:31666/TCP   8m