Docker Node.js Example

.dockerignore

node_modules/
*.log

README.md

Docker Node.js Example

Run:

docker-compose up

See logs:

docker logs <name>

Enter container terminal:

docker exec -it <name> /bin/bash

Open app:

open "http://$(docker-machine ip):8000/"
# curl -i "$(docker-machine ip):8000/"

Stop:

docker-compose down

docker-compose.yml

web:
  build: .
  volumes:
    - .:/usr/src/app/
  ports:
    - "8000:3000"
  links:
    - redis

redis:
  image: redis

Dockerfile

# install latest node
# https://hub.docker.com/_/node/
FROM node:latest

# create and set app directory
RUN mkdir -p /usr/src/app/
WORKDIR /usr/src/app/

# install app dependencies
# this is done before the following COPY command to take advantage of layer caching
COPY package.json . # remember the working directory is `/usr/src/app/`
RUN npm install

# copy app source to destination container
COPY . .

# expose container port
EXPOSE 3000

CMD npm start

package.json

{
  "name": "docker-node-example",
  "version": "0.0.0",
  "description": "An example of a Dockerized Node.js web app.",
  "author": "Mark <[email protected]>",
  "main": "server.js",
  "scripts": {
    "start": "node server.js"
  },
  "keywords": [
      "docker node"
  ],
  "dependencies": {
    "express": "^4.13.4",
    "redis": "^2.6.2"
  },
  "devDependencies": {},
  "license": "MIT"
}

server.js

'use strict';

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

const redis = require('redis');
const client = redis.createClient({
    host: 'redis',
    port: 6379
});

app.get('/', (req, res) => {
    client.incr('hits');
    client.get('hits', (err, hit) => {
        if (err) throw err;
        res.send(`Hits: ${hit}`);
    });
});

const port = 3000;
app.listen(port, () => {
    console.log(`Running on http://localhost:${port}`);
});

https://nodejs.org/en/docs/guides/nodejs-docker-webapp/