nginx.conf.erb

# If we receive X-Forwarded-Proto, pass it through; otherwise, pass along the
# scheme used to connect to this server
map $http_x_forwarded_proto $proxy_x_forwarded_proto {
  default $http_x_forwarded_proto;
  ''      $scheme;
}

# If we receive Upgrade, set Connection to "upgrade"; otherwise, delete any
# Connection header that may have been passed to this server
map $http_upgrade $proxy_connection {
  default upgrade;
  '' close;
}

gzip on;
gzip_types text/plain text/css application/javascript application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

log_format vhost '$host $remote_addr - $remote_user [$time_local] '
                 '"$request" $status $body_bytes_sent '
                 '"$http_referer" "$http_user_agent"';

access_log /proc/self/fd/1 vhost;
error_log /proc/self/fd/2;

# HTTP 1.1 support
proxy_http_version 1.1;
proxy_buffering off;
proxy_set_header Host $http_host;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $proxy_connection;
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 $proxy_x_forwarded_proto;

server {
  listen 80 default_server;
  server_name _; # This is just an invalid value which will never trigger on a real hostname.
  return 503;
}

server {
  server_name _; # This is just an invalid value which will never trigger on a real hostname.
  listen 443 ssl http2;
  return 503;
  ssl_certificate <%= ENV['NGINX_DEFAULT_SSL_CRT'] %>;
  ssl_certificate_key <%= ENV['NGINX_DEFAULT_SSL_KEY'] %>;
}

<% @services.each do |service| %>
  <% if service.host %>
    upstream <%= service.name %> {
      <% service.containers.each do |container| %>
      server <%= container.ip%>:<%= container.port %>;
      <% end %>
    }

    <% if service.ssl? %>

      server {
        server_name <%= service.host %>;
        return 301 https://$host$request_uri;
      }

      server {
        server_name <%= service.host %>;
        client_max_body_size <%= service.client_max_body_size %>;
        listen 443 ssl http2;

        ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES256-GCM-SHA384:DHE-RSA-AES128-GCM-SHA256:DHE-DSS-AES128-GCM-SHA256:kEDH+AESGCM:ECDHE-RSA-AES128-SHA256:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES128-SHA:ECDHE-ECDSA-AES128-SHA:ECDHE-RSA-AES256-SHA384:ECDHE-ECDSA-AES256-SHA384:ECDHE-RSA-AES256-SHA:ECDHE-ECDSA-AES256-SHA:DHE-RSA-AES128-SHA256:DHE-RSA-AES128-SHA:DHE-DSS-AES128-SHA256:DHE-RSA-AES256-SHA256:DHE-DSS-AES256-SHA:DHE-RSA-AES256-SHA:AES128-GCM-SHA256:AES256-GCM-SHA384:AES128-SHA256:AES256-SHA256:AES128-SHA:AES256-SHA:AES:CAMELLIA:DES-CBC3-SHA:!aNULL:!eNULL:!EXPORT:!DES:!RC4:!MD5:!PSK:!aECDH:!EDH-DSS-DES-CBC3-SHA:!EDH-RSA-DES-CBC3-SHA:!KRB5-DES-CBC3-SHA;

        ssl_prefer_server_ciphers on;
        ssl_session_timeout 5m;
        ssl_session_cache shared:SSL:50m;

        ssl_certificate <%= service.ssl_cert_path %>;
        ssl_certificate_key <%= service.ssl_cert_key_path %>;

        add_header Strict-Transport-Security "max-age=31536000";

        location / {
          proxy_pass http://<%= service.name %>;
        }
      }

    <% else %>

      server {
        server_name <%= service.host %>;
        client_max_body_size <%= service.client_max_body_size %>;
        location / {
          proxy_pass http://<%= service.name %>;
        }
      }
    <% end %>
  <% end %>
<% end %>