Jenkins + nginx reverse proxy on Plesk - nginx

Question

I'm running Plesk Obsidian on my centOS server and manually installed Jenkins on it. Jenkins is up and running. It can be used by calling http://my-server.de:38080 without any problems. I also created a new subdomain in Plesk (jenkins.my-server.de), which is secured with a lets encrypt certificate.
My idea was to use the nginx reverse proxy to call Jenkins using the new subdomain: https://jenkins.my-server.de. Therefore I disabled the use of Apache in the Plesk Apache & nginx Settings for the subdomain and added the following additional nginx directives in the Plesk web interface:
location ~ / {
proxy_pass http://localhost:38080;
proxy_read_timeout 90;
proxy_redirect http://localhost:38080 https://jenkins.my-server.de;
}
The problem is, that some sites are working and on other sites I get a 404.
Calling https://jenkins.my-server.de should show me the login page, but I get a 404. Only if I enter https://jenkins.my-server.de/index in the browser, I see the login page.
Calling https://jenkins.my-server.de/manage on the other hand loads the wanted page without error. The page https://jenkins.my-server.de/configureSecurity shows a 404 again and only works if I add /index at the end.
Am I missing something in the nginx settings?

Answer 1

The following configuration is working for me in combination with Plesk.
location ^~ / {
proxy_set_header Host $host:$server_port;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forwarded-Proto $scheme;
proxy_redirect http://localhost:38080 https://jenkins.my-server.de;
proxy_pass http://localhost:38080;
proxy_http_version 1.1;
proxy_request_buffering off;
proxy_buffering off;
add_header 'X-SSH-Endpoint' 'jenkins.my-server.de:50022' always;
}