404 Method not allowed for DELETE as reverse proxy

[ConnorMcLaud]

Hi, I use nginx as reverse proxy to my Flask web server and have following
problem:
after I changed proxy pass to variable DELETE requests started to return 405
Method not allowed (while POST works fine)


        location /client_data {
            resolver 127.0.0.11 valid=60s;
            resolver_timeout 5s;
            set $upstream_client_data web:5000;
            proxy_pass http://$upstream_client_data/client_data;
        }


However, everything works fine with

        location /client_data {
            resolver 127.0.0.11 valid=60s;
            resolver_timeout 5s;
            proxy_pass http://web:5000/client_data;
        }


Full conf:
https://gist.github.com/connormclaud/bc3d65dcb307507c0d8786a168c66b51

What did I do wrong?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,279953,279953#msg-279953