upstream docker-registry {
  server localhost:5000;
}

## Set a variable to help us decide if we need to add the
## 'Docker-Distribution-Api-Version' header.
## The registry always sets this header.
## In the case of nginx performing auth, the header is unset
## since nginx is auth-ing before proxying.

map $upstream_http_docker_distribution_api_version $docker_distribution_api_version {
    '' 'registry/2.0';
    }


server {
  listen 4343 default_server ssl;
  server_name registry.cryptochest.io;

  ssl on;
  ssl_certificate /etc/ssl/certs/registry-bundle.crt;
  ssl_certificate_key /etc/ssl/private/registry.cryptochest.io.key;

  # Recommendations from https://raymii.org/s/tutorials/Strong_SSL_Security_On_nginx.html
  
  ssl_protocols TLSv1.1 TLSv1.2;
  ssl_ciphers 'EECDH+AESGCM:EDH+AESGCM:AES256+EECDH:AES256+EDH';
  ssl_prefer_server_ciphers on;
  ssl_session_cache shared:SSL:10m;

  # 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/ {
    
    proxy_pass http://docker-registry;

	# To add basic authentication to v2 use auth_basic setting.
    auth_basic_user_file /etc/nginx/.htpasswd;
    auth_basic "Access restricted";
	
	# 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_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;
  }
}