Cannot connect build agent to TeamCity behind nginx proxy

Hi,

I have a teamcity behind nginx proxy and my configuration is the following:

Nginx:
teamcity_http.conf

server {

  listen                *:80;

  server_name           teamcity.example.com;

  proxy_set_header        Host $host;

  access_log            /var/log/nginx/teamcity_http.access.log;

  error_log             /var/log/nginx/teamcity_http.error.log;

  location / {

    return 301 https://$host$request_uri;

  }

}

teamcity_https.conf

server {

  listen       *:443 ssl;

  server_name  teamcity.example.com ;

  ssl on;

  ssl_certificate           /etc/nginx/teamcity_https.crt;

  ssl_certificate_key       /etc/nginx/teamcity_https.key;

  ssl_session_cache         shared:SSL:10m;

  ssl_session_timeout       5m;

  ssl_protocols             TLSv1 TLSv1.1 TLSv1.2;

  ssl_ciphers               HIGH:!aNULL:!MD5;

  ssl_prefer_server_ciphers on;

  ssl_stapling              on;

  ssl_trusted_certificate   /etc/nginx/teamcity_https.trusted.crt;

  resolver                  8.8.8.8;

  access_log            /var/log/nginx/ssl-teamcity_https.access.log;

  error_log             /var/log/nginx/ssl-teamcity_https.error.log;

  proxy_set_header        Host $host;

  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;

  add_header              Strict-Transport-Security max-age=15552000;

  location / {

    proxy_redirect http:// https://;

    proxy_pass          http://teamcity;

    proxy_read_timeout  90;

  }

}

TeamCIty itself is listening on 127.0.0.1:8111

I can connect to the TeamCity via Web browser, but Agent fails with the 504 error.

What am I doing wrong?