"Using Nginx for load balancing of NodeJS applications"
Author: chszs, please indicate when reprinting. Blog homepage: http://blog.csdn.net/chszs
Load balancing can allocate user requests to multiple servers for processing, thereby achieving access support for a large number of users. The load balancing architecture is shown in the figure:
For complex web applications, using Nginx for front-end load balancing is a matter of course.
Next, we use Nginx to load balance NodeJS applications.
1. Configure Nginx
Modify nginx.conf:
.... upstream sample { server 127.0.0.1:3000; server 127.0.0.1:3001; keepalive 64; } server { listen 80; .... server_name 127.0.0.1; .... location / { proxy_redirect off; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header Host $http_host; proxy_set_header X-NginX-Proxy true; proxy_set_header Connection ""; proxy_http_version 1.1; proxy_pass http://sample; } }
2. Build NodeJS server
var http = require('http'); var morgan = require('morgan'); var server1 = http.createServer(function (req, res) { console.log("Request for: " + req.url + "-- port 3000 "); res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello Node.js\n'); }).listen(3000, "127.0.0.1"); var server2 = http.createServer(function (req, res) { console.log("Request for: " + req.url + "-- port 3001 "); res.writeHead(200, {'Content-Type': 'text/plain'}); res.end('Hello Node.js\n'); }).listen(3001, "127.0.0.1"); server1.once('listening', function() { console.log('Server running at http://127.0.0.1:3000/'); }); server2.once('listening', function() { console.log('Server running at http://127.0.0.1:3001/'); });
Now we can access http://127.0.0.1
You can see the following output:
Server running at http://127.0.0.1:3000/ Server running at http://127.0.0.1:3001/ Request for: /-- port 3001 Request for: /favicon.ico-- port 3000 Request for: /favicon.ico-- port 3001 Request for: /-- port 3000 Request for: /favicon.ico-- port 3001 Request for: /favicon.ico-- port 3000 Request for: /-- port 3001 Request for: /favicon.ico-- port 3000 Request for: /favicon.ico-- port 3001 Request for: /-- port 3000 Request for: /favicon.ico-- port 3001 Request for: /favicon.ico-- port 3000
The above introduces the use of Nginx for load balancing of NodeJS applications, including the relevant aspects. I hope it will be helpful to friends who are interested in PHP tutorials.