{{ ansible_managed | comment }}
map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
  '' 'registry/2.0';
}

server {
  listen 80;
  autoindex_localtime on;
  server_name {{ registry_site }};

  access_log /var/log/nginx/docker-error.log;
  error_log /var/log/nginx/docker-error.log;
  
  # disable any limits to avoid HTTP 413 for large image uploads
  client_max_body_size 0;

  # required to avoid HTTP 411: see Issue #1486 (https://github.com/moby/moby/issues/1486)
  chunked_transfer_encoding on;

  location /v2/ {
    # Do not allow connections from docker 1.5 and earlier
    # docker pre-1.6.0 did not properly set the user agent on ping, catch "Go *" user agents
    if ($http_user_agent ~ "^(docker\/1\.(3|4|5(?!\.[0-9]-dev))|Go ).*$" ) {
      return 404;
    }

    # To add basic authentication to v2 use auth_basic setting.
    {% if users_filename|length > 0 %}
    auth_basic "Registry realm";
    auth_basic_user_file /etc/nginx/conf.d/nginx.htpasswd;
    {% else %}
    limit_except GET HEAD OPTIONS {
      deny all;
    }
    {% endif %}

    ## If $docker_distribution_api_version is empty, the header is not added.
    ## See the map directive above where this variable is defined.
    add_header 'Docker-Distribution-Api-Version' $docker_distribution_api_version always;

    proxy_pass                          http://127.0.0.1:{{ registry_port }};
    proxy_set_header  Host              $http_host;   # required for docker client's sake
    proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
    proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
    proxy_set_header  X-Forwarded-Proto $scheme;
    proxy_read_timeout                  900;
  }
  
  location / {
    deny all;
  }
}