How to set limit_req for a subdomain in Nginx?

Question

Nginx

Greetings.
Please tell me how to set the limit_req rule for a subdomain.
There is an api, which is available at:
mysite.ru/api
and
api.mysite.ru

For mysite.ru/api, I set the limit_req rule, but it doesn’t work for api.mysite.ru.

server {
  server_name mysite.ru api.mysite.ru www.mysite.ru;
  ...
  ...
  location / {
    location ~ [^/]\.ph(p\d*|tml)$ {
      try_files /does_not_exists @fallback;
    }
    location / {
      try_files /does_not_exists @fallback;
    }
    location /api {
      limit_req zone=req_limit_api burst=1;
      try_files /does_not_exists @fallback;
    }
  }
  location @fallback {
    proxy_pass http://127.0.0.1:8081;
    proxy_redirect http://127.0.0.1:8081 /;
    proxy_set_header Host $host;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-Forwarded-Proto $scheme;
    proxy_set_header X-Forwarded-Port $server_port;
    access_log off;
  }
  listen ....:443 ssl;
}

Answer 1

Make a separate server block for api.mysite.ru and set any limits there.