Node on Digital Ocean

README.md

Node app on Digital Ocean

• Go to https://digitalocean.com
• Create an account
• Add your ssh key
• Buy some credits
• Create an Ubuntu instance with node and your keys, and get its IP

ssh root@YOURINSTANCEIP
apt-get install git nginx
git clone https://gist.github.com/b0146a2b8aa3c24d2dcb.git do-node && cd do-node
mv sites-available-default.conf /etc/nginx/sites-available/default
service nginx restart
mkdir public && mv index.html public/
npm i express
node main.js

• Go to http://YOURINSTANCEIP

You should see a page with a visit counter.

You should now quit the node process and:

npm i -g forever
forever start main.js

Note that if you delete and create an instance in the same region, ssh will fail till you'll remove the old entry from your ~/.ssh/known_hosts. It's likely to be the last one in the file.

When you want to put this on a real domain, point your domain's A-record to your ip, replace localhost with your domain name (i.e. example.com) in /etc/nginx/sites-available/default, and run service nginx restart.

index.html

Loading...

<script>
'use strict'

function reqListener() {
  try {
    var obj = JSON.parse(this.responseText)
    document.body.innerHTML = obj.counter
  } catch(e) {
    document.body.innerHTML = 'error'
  }
}

var oReq = new XMLHttpRequest()
oReq.onload = reqListener
oReq.open('get', '/service/counter', true)
oReq.send()

</script>

main.js

'use strict'

var express = require('express')
var app = express()

app.use(express.static(__dirname + '/public/'));

var counter = 0;
app.get('/service/counter', function (req, res) {
  res.send({ counter: ++counter, pid: process.pid })
})

var server = app.listen(8004, function () {
  var host = server.address().address
  var port = server.address().port
  console.log('Example app listening at http://%s:%s', host, port)
})

sites-available-default.conf

server {
  listen 80 default_server;
  listen [::]:80 default_server ipv6only=on;

  server_name localhost;

  #access_log /root/logs/access.log;
  #error_log /root/logs/error.log;

  location / {
    proxy_pass http://localhost:8004/;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  }

}