Detailed explanation of nginx front-end distribution method based on $remote_addr

The requirements are as follows:

There are multiple servers under the domain name. Now we are testing a certain region. Let the IP users in a certain region access only one server and test it separately. If there is no problem, all servers will be updated. If there is a problem, the impact will be small. We will find and solve the problem in time.

Solution:

Use the nginx module to configure matching rules on the front-end load balancing forwarding machine;

In the nginx configuration vhost, add a piece of code to the location section under the domain name

If $remote_addr matches the ip, forward it to abc_test_server;

server {
  listen 80;
  server_name abc.com.cn;
  access_log /dev/null;
  error_log /data/logs/error.log;
  
  location / {

  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      if ($remote_addr ~ "202.96.134.100") 
       {
           proxy_pass http://abc_test_server;
            break;
        }
  proxy_pass http://abc_server;
  }
}

The load balancing configuration also needs to add a section

#abc_test only
upstream abc_test_server {
  server 192.168.20.10:80;
  
}

#abc.com.cn
upstream abc_server {
  server 192.168.20.11:80;
  server 192.168.20.12:80;
  server 192.168.20.13:80;
}

The set IP will be directly distributed to the backend server 192.168.20.10 for testing;

The above is the full content of this article. I hope it will be helpful for everyone’s study. I also hope that everyone will support 123WORDPRESS.COM.