nginxでuuidを発行する

    userid         on;
    userid_name    uid;
    userid_domain  example.com;
    userid_path    /;
    userid_expires max;
    userid_p3p     'policyref="/w3c/p3p.xml", CP="CUR ADM OUR NOR STA NID"';

    set $uid '-';
    if ( $uid_set != '' ){
      set $uid $uid_set;
    }
    if ( $uid_got != '' ){
      set $uid $uid_got;
    }

    proxy_set_header X-UUID $uid;

    log_format  ltsv  "time:$mtime"
                      "\tmethod:$request_method"
                      "\thost:$host"
                      "\turi:$uri"
                      "\tquery:$args"
                      "\tstatus:$status"
                      "\tip:$http_x_forwarded_for"
                      "\tua:$http_user_agent"
                      "\treferer:$http_referer"
                      "\tuid:$uid";

    access_log  /var/log/nginx/access.ltsv  ltsv;