Nginx做NodeJS应用负载均衡配置实例

负载均衡可以把用户的请求分摊到多个服务器上进行处理,从而实现了对海量用户的访问支持。负载均衡的架构如图所示:

对于复杂的Web应用来说,用Nginx做前端负载均衡是理所当然的事。

下面,我们用Nginx做NodeJS应用的负载均衡。

1、配置Nginx

修改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;

}

}

这里在3000端口和3001端口各有一个Node.js服务器,这两个服务器在做同样的工作。在upstream节,配置了两个Node.js服务器。此外,我们还设置了proxy_pass http://sample做HTTP请求代理。

2、构建NodeJS服务器

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/');

});

3、访问Nginx服务器

现在我们可以访问http://127.0.0.1

可以看到如下的输出:

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

以上是 Nginx做NodeJS应用负载均衡配置实例 的全部内容, 来源链接: utcz.com/a/252294.html

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