Simple application of Nginx upstream module and proxy module

Nginx of Upstream modules and Proxy simple application of modules

nginx in web service is a powerful tool that can do static Span style= "FONT-FAMILY:CALIBRI;" >web service, of course its most common function is its load balancer, the following is just the application nginx upstream module and proxy module to do a little experiment. The function shown here is just the tip of the iceberg.

upstreem Use Note: 1 , use only http context. 2 server can only be used directly ip server IP The way to proxy the backend, the backend uses the apache web service.

experimental topology diagram:

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Experiment Configuration

This experiment mainly uses nginx 's upstream module and proxy module.

Upstream Webservers {

Server 192.168.1.117 weight=1 max_fails=2 fail_timeout=3;

Server 192.168.1.119 weight=1 max_fails=2 fail_timeout=3;

Server 127.0.0.1:8080 backup;

}

server {

Listen 80; at this point the server listens on the tcp/80 Port.

server_name www.a.com ;

Location/{

root HTML;

Index index.html index.htm;

Proxy_pass http://webservers/;

Proxy_set_header X-real-ip $remote _addr;

}

}

server {

Listen 8080;

server_name 127.0.0.1;

Root/www/backup;

}

The above options are described below.

set_header x-real-ip $remote _addr; the proxy sends the header to the upstream server .

add_header X-via $server _addr// is the header that the agent sends to the client.

weight=#:// Weights

max_fails=#:// maximum number of failed attempts, default to 1 .

fail_timeout=time:// timeout for failed attempts, default to 301 .

Backup :                                           // when other services are hung up, it will automatically go to this page. However, no one node on-line backup will be online.

Experimental test

After the configuration is complete, you can test and add a test page to the two hosts on the back end. The httpd service is then started . IP access to nginx server :192.168.1.118

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Refresh Page

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When the backend two servers are stopped at the same time, the service is refreshed again.

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Nginx upstream module and proxy module simple application