## GitLab
##
## Modified from nginx http version
## Modified from http://blog.phusion.nl/2012/04/21/tutorial-setting-up-gitlab-on-debian-6/
## Modified from https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
##
## Lines starting with two hashes (##) are comments with information.
## Lines starting with one hash (#) are configuration parameters that can be uncommented.
##
##################################
##        CONTRIBUTING          ##
##################################
##
## If you change this file in a Merge Request, please also create
## a Merge Request on https://gitlab.com/gitlab-org/omnibus-gitlab/merge_requests
##
###################################
##         configuration         ##
###################################
##
## See installation.md#using-https for additional HTTPS configuration details.

upstream gitlab-workhorse {
  server localhost:8181 fail_timeout=0;
}

map $http_upgrade $connection_upgrade_gitlab_ssl {
    default upgrade;
    ''      close;
}

## Obfuscate access_token and private_token in access log
map $request_uri $obfuscated_request_uri {
    ~(.+\?)(.*&)?(private_token=|access_token=)[^&]*(&.*|$) $1$2$3****$4;
    default $request_uri;
}
log_format main '$remote_addr - $remote_user [$time_local] '
                  '"$request_method $obfuscated_request_uri $server_protocol" $status $body_bytes_sent '
                  '"$http_referer" "$http_user_agent"';

## Redirects all HTTP traffic to the HTTPS host
server {
  ## Either remove "default_server" from the listen line below,
  ## or delete the /etc/nginx/sites-enabled/default file. This will cause gitlab
  ## to be served if you visit any address that your server responds to, eg.
  ## the ip address of the server (http://x.x.x.x/)
  listen 0.0.0.0:80;
  listen [::]:80 ipv6only=on default_server;
  server_name _; ## Replace this with something like gitlab.example.com
  server_tokens off; ## Don't show the nginx version number, a security best practice
  return 301 https://$host:{{GITLAB_PORT}}$request_uri;
  access_log  {{GITLAB_LOG_DIR}}/nginx/gitlab_access.log main;
  error_log   {{GITLAB_LOG_DIR}}/nginx/gitlab_error.log;
}

## HTTPS host
server {
  listen 0.0.0.0:443 ssl http2;
  listen [::]:443 ipv6only=on ssl http2 default_server;
  server_name {{GITLAB_HOST}}; ## Replace this with something like gitlab.example.com
  server_tokens off; ## Don't show the nginx version number, a security best practice

  ## Strong SSL Security
  ## https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html & https://cipherli.st/
  ssl_certificate {{SSL_CERTIFICATE_PATH}};
  ssl_certificate_key {{SSL_KEY_PATH}};
  ssl_verify_client {{SSL_VERIFY_CLIENT}};
  ssl_client_certificate {{SSL_CA_CERTIFICATES_PATH}};

  # GitLab needs backwards compatible ciphers to retain compatibility with Java IDEs
  ssl_ciphers "{{SSL_CIPHERS}}";
  ssl_protocols {{SSL_PROTOCOLS}};
  ssl_prefer_server_ciphers on;
  ssl_session_cache shared:SSL:10m;
  ssl_session_timeout 5m;

  ## See app/controllers/application_controller.rb for headers set

  ## Real IP Module Config
  ## http://nginx.org/en/docs/http/ngx_http_realip_module.html
  real_ip_header X-Real-IP; ## X-Real-IP or X-Forwarded-For or proxy_protocol
  real_ip_recursive {{NGINX_REAL_IP_RECURSIVE}};    ## If you enable 'on'
  ## If you have a trusted IP address, uncomment it and set it
  set_real_ip_from {{NGINX_REAL_IP_TRUSTED_ADDRESSES}}; ## Replace this with something like 192.168.1.0/24

  add_header X-Accel-Buffering {{NGINX_ACCEL_BUFFERING}};
  add_header Strict-Transport-Security "max-age={{NGINX_HSTS_MAXAGE}};";

  ## [Optional] If your certficate has OCSP, enable OCSP stapling to reduce the overhead and latency of running SSL.
  ## Replace with your ssl_trusted_certificate. For more info see:
  ## - https://medium.com/devops-programming/4445f4862461
  ## - https://www.ruby-forum.com/topic/4419319
  ## - https://www.digitalocean.com/community/tutorials/how-to-configure-ocsp-stapling-on-apache-and-nginx
  # ssl_stapling on;
  # ssl_stapling_verify on;
  # ssl_trusted_certificate /etc/nginx/ssl/stapling.trusted.crt;
  # resolver 208.67.222.222 208.67.222.220 valid=300s; # Can change to your DNS resolver if desired
  # resolver_timeout 5s;

  ## [Optional] Generate a stronger DHE parameter:
  ##   sudo openssl dhparam -out /etc/ssl/certs/dhparam.pem 4096
  ##
  ssl_dhparam {{SSL_DHPARAM_PATH}};

  ## Individual nginx logs for this GitLab vhost
  access_log  {{GITLAB_LOG_DIR}}/nginx/gitlab_access.log main;
  error_log   {{GITLAB_LOG_DIR}}/nginx/gitlab_error.log;

  location / {
    client_max_body_size 0;
    gzip off;

    ## https://github.com/gitlabhq/gitlabhq/issues/694
    ## Some requests take more than 30 seconds.
    proxy_read_timeout      300;
    proxy_connect_timeout   300;
    proxy_redirect          off;
    proxy_buffering         {{NGINX_PROXY_BUFFERING}};

    proxy_http_version 1.1;

    proxy_set_header    Host                $http_host;
    proxy_set_header    X-Real-IP           $remote_addr;
    proxy_set_header    X-Forwarded-Ssl     on;
    proxy_set_header    X-Forwarded-For     $proxy_add_x_forwarded_for;
    proxy_set_header    X-Forwarded-Proto   {{NGINX_X_FORWARDED_PROTO}};
    proxy_set_header    Upgrade             $http_upgrade;
    proxy_set_header    Connection          $connection_upgrade_gitlab_ssl;

    proxy_pass http://gitlab-workhorse;
  }

  error_page 404 /404.html;
  error_page 422 /422.html;
  error_page 500 /500.html;
  error_page 502 /502.html;
  error_page 503 /503.html;
  location ~ ^/(404|422|500|502|503)\.html$ {
    root {{GITLAB_INSTALL_DIR}}/public;
    internal;
  }

  {{NGINX_CUSTOM_GITLAB_SERVER_CONFIG}}
}