{ pkgs, ... }:
let
  access_log_sink = "workhorse.private:12304";
  error_log_sink = "workhorse.private:12305";
in
{
  # for graylog logging
  services.nginx.commonHttpConfig = ''
    log_format graylog2_json escape=json '{ "timestamp": "$time_iso8601", '
      '"facility": "nginx", '
      '"remote_addr": "$remote_addr", '
      '"body_bytes_sent": $body_bytes_sent, '
      '"request_time": $request_time, '
      '"response_status": $status, '
      '"request": "$request", '
      '"request_method": "$request_method", '
      '"host": "$host",'
      '"upstream_cache_status": "$upstream_cache_status",'
      '"upstream_addr": "$upstream_addr",'
      '"http_x_forwarded_for": "$http_x_forwarded_for",'
      '"http_referrer": "$http_referer", '
      '"http_user_agent": "$http_user_agent" }';

    access_log syslog:server=${access_log_sink} graylog2_json;
    error_log syslog:server=${error_log_sink};
  '';

  services.nginx.package = pkgs.nginxMainline;
}