Node.js + Nginx - What now?

Nginx works as a front end server, which in this case proxies the requests to a node.js server. Therefore you need to setup an nginx config file for node.

This is what I have done in my Ubuntu box:

Create the file yourdomain.com at /etc/nginx/sites-available/:

vim /etc/nginx/sites-available/yourdomain.com

In it you should have something like:

# the IP(s) on which your node server is running. I chose port 3000.upstream app_yourdomain {    server 127.0.0.1:3000;    keepalive 8;}# the nginx server instanceserver {    listen 80;    listen [::]:80;    server_name yourdomain.com www.yourdomain.com;    access_log /var/log/nginx/yourdomain.com.log;    # pass the request to the node.js server with the correct headers    # and much more can be added, see nginx config options    location / {      proxy_set_header X-Real-IP $remote_addr;      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;      proxy_set_header Host $http_host;      proxy_set_header X-NginX-Proxy true;      proxy_pass http://app_yourdomain/;      proxy_redirect off;    } }

If you want nginx (>= 1.3.13) to handle websocket requests as well, add the following lines in the location / section:

proxy_http_version 1.1;proxy_set_header Upgrade $http_upgrade;proxy_set_header Connection "upgrade";

Once you have this setup you must enable the site defined in the config file above:

cd /etc/nginx/sites-enabled/ ln -s /etc/nginx/sites-available/yourdomain.com yourdomain.com

Create your node server app at /var/www/yourdomain/app.js and run it at localhost:3000

var http = require('http');http.createServer(function (req, res) {    res.writeHead(200, {'Content-Type': 'text/plain'});    res.end('Hello World\n');}).listen(3000, "127.0.0.1");console.log('Server running at http://127.0.0.1:3000/');

Test for syntax mistakes:

nginx -t

Restart nginx:

sudo /etc/init.d/nginx restart

Lastly start the node server:

cd /var/www/yourdomain/ && node app.js

Now you should see "Hello World" at yourdomain.com

One last note with regards to starting the node server: you should use some kind of monitoring system for the node daemon. There is an awesome tutorial on node with upstart and monit.

You can also setup multiple domain with nginx, forwarding to multiple node.js processes.

For example to achieve these:

• domain1.com -> to Node.js process running locally http://127.0.0.1:4000
• domain2.com -> to Node.js process running locally http://127.0.0.1:5000

These ports (4000 and 5000) should be used to listen the app requests in your app code.

/etc/nginx/sites-enabled/domain1

server {    listen 80;    listen [::]:80;    server_name domain1.com;    access_log /var/log/nginx/domain1.access.log;    location / {        proxy_pass    http://127.0.0.1:4000/;    }}

In /etc/nginx/sites-enabled/domain2

server {    listen 80;    listen [::]:80;    server_name domain2.com;    access_log /var/log/nginx/domain2.access.log;    location / {        proxy_pass    http://127.0.0.1:5000/;    }}

You can also have different urls for apps in one server configuration:

• yourdomain.com/app1/* -> to Node.js process running locallyhttp://127.0.0.1:3000
• yourdomain.com/app2/* -> to Node.js processrunning locally http://127.0.0.1:4000

In /etc/nginx/sites-enabled/yourdomain:

server {    listen 80;    listen [::]:80;    server_name yourdomain.com;    location ^~ /app1/{        proxy_set_header X-Real-IP $remote_addr;        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;        proxy_set_header Host $http_host;        proxy_set_header X-NginX-Proxy true;        proxy_pass    http://127.0.0.1:3000/;    }    location ^~ /app2/{        proxy_set_header X-Real-IP $remote_addr;        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;        proxy_set_header Host $http_host;        proxy_set_header X-NginX-Proxy true;        proxy_pass    http://127.0.0.1:4000/;    }}

Restart nginx:

sudo service nginx restart

Starting applications.

node app1.js

var http = require('http');http.createServer(function (req, res) {    res.writeHead(200, {'Content-Type': 'text/plain'});    res.end('Hello from app1!\n');}).listen(3000, "127.0.0.1");console.log('Server running at http://127.0.0.1:3000/');

node app2.js

var http = require('http');http.createServer(function (req, res) {    res.writeHead(200, {'Content-Type': 'text/plain'});    res.end('Hello from app2!\n');}).listen(4000, "127.0.0.1");console.log('Server running at http://127.0.0.1:4000/');