upstream docker {
    server 172.31.20.66:5000;
}

server {
    listen       80;
    server_name  docker.alphabets.cn;
    return       301 https://$host$request_uri;
}

server {
    listen                     443;
    server_name                docker.alphabets.cn;

    client_max_body_size       0; # disable any limits to avoid HTTP 413 for large image uploads
    chunked_transfer_encoding on;

    ssl                        on;
    ssl_certificate            /etc/nginx/conf.d/ssl/ssl-bundle.crt;
    ssl_certificate_key        /etc/nginx/conf.d/ssl/ssl.key;

    # enables all versions of TLS, but not SSLv2 or 3 which are weak and now deprecated.
    ssl_protocols              TLSv1 TLSv1.1 TLSv1.2;

    # Disables all weak ciphers
    ssl_ciphers "ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES
128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";

    ssl_prefer_server_ciphers 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 plus add_header
        # auth_basic "registry.localhost";
        # auth_basic_user_file test.password;
        # add_header 'Docker-Distribution-Api-Version' 'registry/2.0' always;

        proxy_pass                          http://docker;
        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 /v0/ {
        return 301 https://$host/v2/;
    }

    location / {
        proxy_pass                          http://docker;
        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;
    }
}