Nginx – How to correctly route a Gitlab installation in a subdirectory through an SSL reverse proxy

I am currently struggling with routing a Gitlab installation through an SSL reverse proxy to have Gitlab respond at the path https://myserver/git.

I am using the sameersbn/gitlab Docker image and an nginx web server as the reverse proxy.

Without SSL, I use the following environment configuration for Gitlab:

• GITLAB_PORT: 80
• GITLAB_RELATIVE_URL_ROOT: /git
• GITLAB_HOST: myserver

My site-config for nginx looks like this:

server {
        listen 80 default_server;
        server_name myserver;


    location /git {
        proxy_pass      http://gitlab/git;

        proxy_redirect off;
        proxy_set_header Host           $http_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;
    }

}

The reverse proxy is also a Docker container which links my Gitlab container as hostname gitlab.

This works – going to http://myserver/git redirects me to the login page.

However, when changing it to SSL:

• GITLAB_PORT: 443
• GITLAB_RELATIVE_URL_ROOT: /git
• GITLAB_HOST: myserver
• GITLAB_HTTPS: true
• SSL_SELF_SIGNED: true

and

server {
    listen 443 ssl;
    server_name myserver;
    ssl_certificate /etc/ssl/certs/server.crt;
    ssl_certificate_key /etc/ssl/certs/server.key;

    location /git {
        proxy_pass      http://gitlab/git;

        proxy_redirect off;
        proxy_set_header Host           $http_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  https;
    }

}

does not work. When calling https://myserver/git, it tries to redirect to http://localhost.my.company.domain.com/git/users/sign_in which does not exist.

When I use curl -k -L -vvv https://myserver/git I see that nginx redirects me to http://localhost/git/users/sign_in.

What am I missing?