Make cPanel's PHP-FPM max_children change persistent accross reboots

increase_cpanel_php_fpm_limit.sh

#!/bin/sh

# License: MIT License
# Copyright (c) 2023 Julien Tessier, Hodi.host
# 
# This script allows to have persistent change on cPanel's PHP-FPM limits
# (see https://support.cpanel.net/hc/en-us/articles/1500012339862-Server-reached-max-children-setting-25-consider-raising-it-cPanel-PHP-FPM-)
#
# Instructions:
#   Backup files in /var/cpanel/php-fpm.d/
#   Edit the line 22 as required (and duplicate it if needed), in the example I set 250 max_children for user "hodi"
#   Put this script in /usr/local/cpanel/libexec/on_boot/increase_cpanel_php_fpm_limit
#   Make sure it's chmod'ed to be executable
#   Reboot and see how the change is now persistent : )

# First wait until cPanel's PHP-FPM has started (I don't know when cPanel overwrites the config)
until [ `ps ax | grep php-fpm.*/usr/local/cpanel/ | wc -l` -ge 2 ]
do
    sleep 1
done
# Then edit the max_children as needed (per user)
sed -i -e '/pm\.max_children =/ s/= .*/= 250/' /var/cpanel/php-fpm.d/hodi.conf
# Finally restart cPanel's PHP-FPM
/scripts/restartsrv_cpanel_php_fpm