Nginx proxy_pass only works partially

Question

I have the following setup

• Master server - call it https://master.com
• Slave server - call it https://slave.com

Bo

Answer 1

Your approach is wrong. Inside the block which handles /test your rewrite it and send it out of the block. The proxy_pass never actually happens because the new URL doesn't have /test in it. Solution is simple, don't use rewrite

location /test/
{
 proxy_pass https://slave.com/;
 proxy_read_timeout 240;
 proxy_redirect off;
 proxy_buffering off;
 proxy_set_header Host $host;
 proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 proxy_set_header X-Forwarded-Proto https;
}

Appending / at the end of the location path and also the proxy_pass server will make sure what is after /test/ is sent to your proxy_pass address

Edit-1

Here is a sample test case I had set before posting this answer.

events {
    worker_connections  1024;
}
http {
server {
   listen 80;

   location /test1 {
     proxy_pass http://127.0.0.1:81;
   }

   location /test2 {
     proxy_pass http://127.0.0.1:81/;
   }

   location /test3/ {
     proxy_pass http://127.0.0.1:81;
   }

   location /test4/ {
     proxy_pass http://127.0.0.1:81/;
   }

}

server {
   listen 81;

   location / {
     echo "$request_uri";
   }
}
}

Now the results explains the difference between all 4 location blocks

$ curl http://192.168.33.100/test1/abc/test
/test1/abc/test

$ curl http://192.168.33.100/test2/abc/test
//abc/test

$ curl http://192.168.33.100/test3/abc/test
/test3/abc/test

$ curl http://192.168.33.100/test4/abc/test
/abc/test

As you can see in /test4 url the proxied server only sees /abc/test