Is there a script that "turns on" the testcookie during an attack?

Question

Nginx

Hello, is there a script that monitors the number of connections to nginx (for example, using the ngx_http_stub_status_module module) and, in case of an attack, "turns on" testcookie (changes "testcookie off" to "testcookie on" in the config)?
I found one but it doesn't work :(

script i found

#!/bin/sh
 
NGINX_CONF=/srv/www/nagg.ru/conf/nginx.conf
MAIL="" # true is enable send mail
MAILTO=root
LA_ACTIVATE=17
LA_DEACTIVATE=5
NGINX_CONNECT=1000
 
########################################################
TMPLOG=/tmp/testcookie_module.tmp
NGINXCONN=`curl -s http://localhost/nginx-status | grep "Active" | awk '{print($3)}'`
LA=`cat /proc/loadavg | awk -F '.' '{print($1)}'`
 
function e {
    echo -en $(date "+%F %T"): "$1"
}
 
if [ ! -f $TMPLOG ];then echo 0 > $TMPLOG; fi
LASTRESULT=`cat $TMPLOG`
 
if [ -n "$NGINXCONN" ]; then
  if [ $NGINXCONN -gt $NGINX_CONNECT ]; then
    ALERT1="1"
  fi
fi
 
if [ -n "$LA" ]; then
  if [ $LA -gt $LA_ACTIVATE ]; then
    ALERT2="1"
  fi
fi
 
ALERT=$ALERT1$ALERT2
 
if [ -n "$ALERT" -a $LASTRESULT -eq 0 ]; then
    e; printf "Nginx connect: %-4s LA: %-3s | Activate testcookie\n" "$NGINXCONN" "$LA"
    sed -i 's/.*##-AUTO-DDOS-LABEL-##/\ttestcookie on; ##-AUTO-DDOS-LABEL-##/g' $NGINX_CONF
    /sbin/service nginx reload >/dev/null 2>&1
    echo 1 > $TMPLOG
    if [ "$MAIL" = "true" ];then
        echo "Nginx connect $NGINXCONN, LA $LA. Nginx test-cookie enable" | mail -s "`hostname` DDOS detected. Nginx test-cookie enable" $MAILTO
    fi
fi
 
if [ $LA -le $LA_DEACTIVATE -a $LASTRESULT -eq 1 ]; then
    e; printf "Nginx connect: %-4s LA: %-3s | Dectivate testcookie\n" "$NGINXCONN" "$LA"
    sed -i 's/.*##-AUTO-DDOS-LABEL-##/\ttestcookie off; ##-AUTO-DDOS-LABEL-##/g' $NGINX_CONF
    /sbin/service nginx reload >/dev/null 2>&1
    echo 0 > $TMPLOG
fi

Answer 1

and your nginx config is here?
/srv/www/nagg.ru/conf/nginx.conf7